Opalinski v. Robert Half International Inc. , 761 F.3d 326 ( 2014 )


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  •                                       PRECEDENTIAL
    UNITED STATES COURT OF APPEALS
    FOR THE THIRD CIRCUIT
    ________________
    No. 12-4444
    ________________
    DAVID OPALINSKI;
    JAMES MCCABE, on behalf of themselves
    and all others similarly situated
    v.
    ROBERT HALF INTERNATIONAL INC;
    ROBERT HALF CORPORATION;
    Appellants
    ________________
    Appeal from the United States District Court
    for the District of New Jersey
    (D.C. Civil Action No. 2-10-cv-02069)
    District Judge: Honorable Faith S. Hochberg
    ________________
    Argued April 7, 2014
    Before: AMBRO, JORDAN, and ROTH, Circuit Judges
    (Opinion filed: July 30, 2014)
    Richard L. Alfred, Esquire (Argued)
    Patrick J. Bannon, III, Esquire
    Carla J. Easton, Esquire
    James M. Hlawek, Esquire
    Seyfarth Shaw LLP
    Two Seaport Lane
    World Trade Center East, Suite 300
    Boston, MA 02210
    Christopher H. Lowe, Esquire
    Seyfarth Shaw LLP
    620 Eighth Avenue
    New York, NY 10018
    James M. Harris, Esquire
    Seyfarth Shaw LLP
    2029 Century Park East, Suite 3500
    Los Angeles, CA 90067
    Adam N. Saravay, Esquire
    McCarter & English
    100 Mulberry Street
    Four Gateway Center, 14th Floor
    Newark, NJ 07102
    Alexander Wood, Esquire
    Paul Hastings
    75 East 55th Street
    New York, NY 10022
    Counsel for Appellants
    2
    Shannon Liss-Riordan, Esquire (Argued)
    Lichten & Liss-Riordan, P.C.
    100 Cambridge Street, 20th Floor
    Boston, MA 02114
    Anthony L. Marchetti, Jr., Esquire
    Marchetti Law, P.C.
    900 North Kings Highway
    Cherry Hill, NJ 08034
    Counsel for Appellees
    ________________
    OPINION OF THE COURT
    ________________
    AMBRO, Circuit Judge
    We consider whether a district court, rather than an
    arbitrator, should decide if an agreement to arbitrate disputes
    between the parties to that agreement also authorizes
    classwide arbitration. Because of the fundamental differences
    between classwide and individual arbitration, and the
    consequences of proceeding with one rather than the other,
    we hold that the availability of classwide arbitration is a
    substantive “question of arbitrability” to be decided by a court
    absent clear agreement otherwise.
    I.     Background
    Plaintiffs David Opalinski and James McCabe
    (sometimes collectively referred to as “Appellees”), former
    employees of Robert Half International, Inc. (“RHI”), bring
    this action on behalf of themselves and other individuals,
    3
    alleging that RHI failed to pay them overtime and improperly
    classified them as overtime-exempt employees in violation of
    the Fair Labor Standards Act (“FLSA”), 29 U.S.C. § 201 et
    seq. Both McCabe and Opalinski signed employment
    agreements that contained arbitration provisions. They
    provide that “[a]ny dispute or claim arising out of or relating
    to Employee’s employment, termination of employment or
    any provision of this Agreement” shall be submitted to
    arbitration.     Neither agreement mentions classwide
    arbitration.
    RHI moved to compel arbitration of Opalinski and
    McCabe’s claims on an individual basis. In October 2011,
    the District Court granted the motion in part, thus compelling
    arbitration but holding that the propriety of individual (also
    known as bilateral) versus classwide arbitration was for the
    arbitrator to decide (the “October 2011 Order”). The Court
    subsequently entered an order terminating the case. Rather
    than immediately appealing the October 2011 Order, RHI
    proceeded with the arbitration process and did not return to
    the District Court until the arbitrator issued a partial award
    and ruled that the employment agreements permitted
    classwide arbitration. RHI then moved the District Court to
    vacate the arbitrator’s partial award. The District Court
    denied the motion to vacate (the “December 2012 Order”).
    RHI appeals the December 2012 Order. The crux of
    the appeal, however, is not the underlying issue whether the
    employment agreements between the parties permit classwide
    as opposed to only bilateral arbitration. Rather, the question
    before us is who decides – that is, should the availability of
    classwide arbitration have been decided by the arbitrator or
    by the District Court?
    4
    II.    Jurisdiction and Standard of Review
    The District Court had jurisdiction over this action per
    28 U.S.C. § 1331 because Plaintiffs brought claims under the
    FLSA. We have jurisdiction under 9 U.S.C. § 16(a)(1)(D)
    (“An appeal may be taken from . . . an order . . . confirming
    or denying confirmation of an award or partial award[.]”).
    Appellees argue that this appeal is untimely because
    although RHI styles it as one based on the District Court’s
    December 2012 Order denying its motion to vacate, the
    appeal actually challenges only the October 2011 Order’s
    holding that the availability of classwide arbitration is a
    question for the arbitrator. The October 2011 Order,
    Appellees contend, was a final decision that was immediately
    appealable on an interlocutory basis, and RHI’s attempt now
    to appeal the merits of that decision is untimely. See Fed. R.
    App. P. 4(a)(1)(A) (party seeking to appeal a final decision
    must file notice of appeal within 30 days of entry of the
    judgment or order appealed from).
    The Federal Arbitration Act “preserves immediate
    appeal of any ‘final decision with respect to an arbitration,’ . .
    . whether the decision is favorable or hostile to arbitration.”
    Green Tree Fin. Corp.-Ala. v. Randolph, 
    531 U.S. 79
    , 86
    (2000) (quoting 9 U.S.C. § 16(a)(3)). A “final decision” is
    one that “ends the litigation on the merits and leaves nothing
    more for the court to do but execute the judgment.” 
    Id. (quotation marks
    and citation omitted). Here the October
    2011 Order was not a final decision because it effected only a
    non-final,    administrative      closure,    and      explicitly
    acknowledged the potential need for further litigation before
    the District Court. Freeman v. Pittsburgh Glass Works, LLC,
    
    709 F.3d 240
    , 247 (3d Cir. 2013) (“administrative closings
    are not final orders”). RHI timely appealed the District
    5
    Court’s final decision – the December 2012 Order – and we
    have jurisdiction to consider this appeal.
    “On appeal from a district court’s ruling on a motion
    to confirm or vacate an arbitration award, we review its legal
    conclusions de novo and its factual findings for clear error.”
    Sutter v. Oxford Health Plans LLC, 
    675 F.3d 215
    , 219 (3d
    Cir. 2012), aff’d, 
    133 S. Ct. 2064
    (2013).
    III.   Discussion
    We decide first what arguments we may properly
    consider on this appeal. Appellees contend that because RHI
    did not argue in its Motion to Vacate that the District Court
    (and not the arbitrator) should have determined the
    permissibility of classwide arbitration, it has waived its right
    to raise that argument in this appeal. However, waiver, which
    is intended to protect litigants from unfair surprise and
    prevent district courts from being reversed on grounds that
    were never argued before them, does not apply in this
    instance. Appellees were well aware of RHI’s argument that
    the District Court, not the arbitrator, should decide the
    availability of classwide arbitration: the Court expressly
    addressed the issue in its October 2011 Order, RHI objected
    to the arbitrator’s determination whether classwide arbitration
    was permissible throughout the arbitration proceedings, and
    RHI did flag the “who decides” issue in its Motion to Vacate
    by reminding the Court that “from the outset [RHI] has
    maintained that the class action issue is for this Court to
    decide.” Thus, our addressing the issue on appeal prejudices
    neither Appellees nor the District Court.
    We proceed to the merits of the case and consider
    whether, in the context of an otherwise silent contract, the
    availability of classwide arbitration is to be decided by a court
    rather than an arbitrator. The analysis is twofold. We decide
    6
    first whether the availability of classwide arbitration is a
    “question of arbitrability.” See Howsam v. Dean Witter
    Reynolds, Inc., 
    537 U.S. 79
    , 83 (2002) (internal quotation
    marks and citation omitted). If yes, it is presumed that the
    issue is “for judicial determination unless the parties clearly
    and unmistakably provide otherwise.” 
    Id. (internal quotation
    marks, citations, and alteration omitted). If the availability of
    classwide arbitration is not a “question of arbitrability,” it is
    presumptively for the arbitrator to resolve. See First Options
    of Chi., Inc. v. Kaplan, 
    514 U.S. 938
    , 944-45 (1994).
    A.     Is the availability of classwide arbitration a “question
    of arbitrability”?
    “[A]rbitration is a matter of contract and a party cannot
    be required to submit to arbitration any dispute which he has
    not agreed so to submit.” 
    Howsam, 537 U.S. at 83
    (internal
    quotation marks and citation omitted). While federal policy
    favors arbitration agreements, an arbitrator has the power to
    decide an issue only if the parties have authorized the
    arbitrator to do so. Because parties frequently disagree
    whether a particular dispute is arbitrable, courts play a limited
    threshold role in determining “whether the parties have
    submitted a particular dispute to arbitration, i.e., the ‘question
    of arbitrability[.]’” 
    Id. at 83
    (emphasis in original).
    “Questions of arbitrability” are limited to a narrow
    range of gateway issues. They may include, for example,
    “whether the parties are bound by a given arbitration clause”
    or “whether an arbitration clause in a concededly binding
    contract applies to a particular type of controversy.” 
    Id. at 84.
    On the other hand, questions that the parties would likely
    expect the arbitrator to decide are not “questions of
    arbitrability.” 
    Id. Those include
    “‘procedural’ questions that
    grow out of the dispute and bear on its final disposition[,]” as
    7
    well as allegations of waiver, delay, or similar defenses to
    arbitrability. 
    Id. The Supreme
    Court has not yet decided whether the
    availability of class arbitration is a “question of arbitrability.”
    In Green Tree Financial Corp. v. Bazzle, 
    539 U.S. 444
    (2003), a plurality of the Court concluded that the availability
    of classwide arbitration was not a question of arbitrability
    because “it concerns neither the validity of the arbitration
    clause nor its applicability to the underlying dispute between
    the parties . . . [, but only] contract interpretation and
    arbitration procedures.” 
    Id. at 451,
    452-53.
    Subsequent Supreme Court decisions, however, cast
    doubt on the Bazzle plurality’s decision. In Stolt-Nielsen S.A.
    v. AnimalFeeds International Corp., 
    559 U.S. 662
    (2010), the
    Court specifically noted that “only the plurality” in Bazzle
    decided that an arbitrator should determine whether a contract
    permits classwide arbitration and Bazzle is accordingly not
    binding on this point. 
    Id. at 680.
    And in Oxford Health
    Plans LLC v. Sutter, 
    133 S. Ct. 2064
    (2013), the Court again
    stated that it “has not yet decided whether the availability of
    class arbitration” is for a court or for an arbitrator to resolve.
    
    Id. at 2069
    n.2.
    Our Court has also not decided whether the availability
    of classwide arbitration is a question of arbitrability. We
    briefly addressed the issue in Quilloin v. Tenett HealthSys.
    Philadelphia, Inc., 
    673 F.3d 221
    (3d Cir. 2012), where we
    concluded that classwide arbitration was not a question of
    arbitrability. 
    Id. at 232
    (“Silence regarding class arbitration
    generally indicates a prohibition against class arbitration, but
    the actual determination as to whether class action is
    prohibited is a question of interpretation and procedure for the
    arbitrator.”). However, this single sentence addressing “who
    decides” is a dictum because at the district court level the
    8
    parties in Quilloin had already agreed that the arbitrator
    should be the one to determine whether the contract provided
    for class action arbitration. See Quilloin v. Tenett HealthSys.
    Philadelphia, Inc., 
    763 F. Supp. 2d 707
    , 727 n.22 (E.D. Pa.
    2011). Additionally, Quilloin relied solely on the Supreme
    Court’s decision in Stolt-Nielsen for its conclusion that the
    availability of class arbitration is a question of procedure for
    the arbitrator to decide. 
    See 673 F.3d at 232
    . This reliance
    falls short: not only does Stolt-Nielsen expressly state that the
    Supreme Court has not yet resolved the “who decides” issue
    but, as explained below, the opinion also indicates that the
    availability of classwide arbitration is a question of substance
    rather than procedure. Thus, whether the availability of
    classwide arbitration is a “question of arbitrability” to be
    presumptively decided by a court remains an open question.
    Our Court has explained that questions of arbitrability
    generally fall into two categories – (1) when the parties
    dispute “whether [they] have a valid arbitration agreement at
    all” (whose claims the arbitrator may adjudicate); and (2)
    “when the parties are in dispute as to whether a concededly
    binding arbitration clause applies to a certain type of
    controversy” (what types of controversies the arbitrator may
    decide). Puleo v. Chase Bank USA, N.A., 
    605 F.3d 172
    , 178
    (3d Cir. 2010) (en banc) (internal quotation marks and
    citation omitted). The crucial consideration is the expectation
    of the contracting parties: We do not “forc[e] parties to
    arbitrate a matter that they may well not have agreed to
    arbitrate.” 
    Howsam, 537 U.S. at 83
    . We now hold that
    whether an agreement provides for classwide arbitration is a
    “question of arbitrability” to be decided by the District Court.
    9
    1.    The availability of class arbitration implicates
    whose claims the arbitrator may resolve.
    The Supreme Court has long recognized that a district
    court must determine whose claims an arbitrator is authorized
    to decide. In John Wiley & Sons, Inc. v. Livingston, 
    376 U.S. 543
    (1964), the defending company claimed it was not bound
    by the arbitration provisions of an agreement signed by a
    company with which it had merged. 
    Id. at 546-47.
    The Court
    stated that there was “no doubt” that the issue “whether or not
    the company was bound to arbitrate, as well as what issues it
    must arbitrate, is a matter to be determined by the Court . . . .”
    
    Id. at 546-47
    (internal quotation marks and citations omitted).
    Similarly, in First Options individual business owners argued
    that they were not personally bound by an arbitration
    agreement they had signed on behalf of their wholly owned
    company. 
    See 514 U.S. at 941-42
    . The Court again
    concluded that this was a “question of arbitrability” to be
    presumptively determined by a court absent clear contractual
    language to the contrary. 
    Id. at 946-47.
    Our Circuit has also
    held repeatedly that whose claims an arbitrator may decide is
    an issue for the courts. See, e.g., Allstate Settlement Corp. v.
    Rapid Settlements, Ltd., 
    559 F.3d 164
    , 169 (3d Cir. 2009)
    (“[w]hether the arbitrator’s award binds [a third-party] is a
    question that the court must decide”); Sandvik AB v. Advent
    Int’l Corp., 
    220 F.3d 99
    , 107 (3d Cir. 2000) (determining
    “whether Huep’s signature bound Advent” was “a necessary
    prerequisite to the court’s fulfilling its role of determining
    whether the dispute is one for an arbitrator to decide”).
    Here, based on the agreement to arbitrate with
    Opalinski and McCabe, RHI moved to compel bilateral
    arbitration with each of them.       By seeking classwide
    arbitration, however, Opalinski and McCabe contend that
    their arbitration agreements empower the arbitrator to resolve
    not only their personal claims but the claims of additional
    10
    individuals not currently parties to this action.           The
    determination whether RHI must include absent individuals in
    its arbitrations with Opalinski or McCabe affects whose
    claims may be arbitrated and is thus a question of arbitrability
    to be decided by the court. See 
    Stolt-Nielsen, 559 U.S. at 683
    (“parties may specify with whom they choose to arbitrate their
    disputes” (emphasis in original)); 
    id. at 686
    (in classwide
    arbitration, the arbitrator “no longer resolves a single dispute
    between the parties to a single agreement, but instead resolves
    many disputes between hundreds or perhaps even thousands
    of parties”). Additionally, as Justice Alito warned in his
    concurrence in Oxford Health, courts should be wary of
    concluding that the availability of classwide arbitration is for
    the arbitrator to decide, as that decision implicates the rights
    of absent class members without their 
    consent. 133 S. Ct. at 2071-72
    (Alito, J., concurring) (“at least where absent class
    members have not been required to opt in, it is difficult to see
    how an arbitrator’s decision to conduct class proceedings
    could bind absent class members who have not authorized the
    arbitrator to decide on a classwide basis which arbitration
    procedures are to be used” (emphasis in original)).
    2.      The availability of classwide arbitration
    implicates the type of controversy submitted to arbitration.
    The availability of classwide arbitration is a “question
    of arbitrability” for a second, independent reason – it
    concerns “whether a concededly binding arbitration clause
    applies to a certain type of controversy.” 
    Puleo, 605 F.3d at 178
    (internal quotation marks and citation omitted); see also
    Granite Rock Co. v. Int’l Bhd. of Teamsters, 
    561 U.S. 287
    ,
    297 (2010) (“[A] court may order arbitration of a particular
    dispute only where the court is satisfied that the parties
    agreed to arbitrate that dispute[.]” (emphasis in original)).
    11
    Opalinski and McCabe argue that, because class
    actions in the context of traditional litigation are a procedural
    construct, the availability of classwide arbitration is also a
    procedural question. In Stolt-Nielsen, however, the Supreme
    Court expressly disclaimed classwide arbitration as simply
    
    procedural. 559 U.S. at 687
    (the differences between class
    and individual arbitration cannot be characterized as a
    question of “merely what ‘procedural mode’ [i]s available to
    present [a party’s] claims”). The Court stated that “class-
    action arbitration changes the nature of arbitration to such a
    degree that it cannot be presumed the parties consented to it
    by simply agreeing to submit their disputes to an arbitrator.”
    
    Id. at 685.
    To further the point, it continued on to explain the
    numerous differences between bilateral and class arbitration,
    notably that
    [(1) a]n arbitrator . . . no longer resolves a
    single dispute between the parties to a single
    agreement, but instead resolves many disputes
    between hundreds or perhaps even thousands of
    parties . . . [; (2)] the presumption of privacy
    and confidentiality that applies in many bilateral
    arbitrations [does] not apply in class
    arbitrations[,] thus potentially frustrating the
    parties’ assumptions when they agreed to
    arbitrate[; (3) t]he arbitrator’s award no longer
    purports to bind just the parties to a single
    arbitration agreement, but adjudicates the rights
    of absent parties as well[; and (4)] the
    commercial stakes of class-action arbitration are
    comparable to those of class-action litigation,
    even though the scope of judicial review is
    much more limited.
    
    Id. at 686-87
    (internal quotation marks and citations omitted).
    In AT&T Mobility LLC v. Concepcion, 
    131 S. Ct. 1740
    12
    (2011), the Court similarly emphasized that the “changes
    brought about by the shift from bilateral arbitration to class-
    action arbitration are fundamental,” concluding that
    “[a]rbitration is poorly suited to the higher stakes of class
    litigation” and that classwide arbitration “is not arbitration as
    envisioned by the FAA.” 
    Id. at 1750,
    1751-53 (internal
    quotation marks and citations omitted) (emphasis added).
    Accordingly, we read the Supreme Court as
    characterizing the permissibility of classwide arbitration not
    solely as a question of procedure or contract interpretation but
    as a substantive gateway dispute qualitatively separate from
    deciding an individual quarrel.         Traditional individual
    arbitration and class arbitration are so distinct that a choice
    between the two goes, we believe, to the very type of
    controversy to be resolved. We turn below to the support our
    Sixth Circuit colleagues give to this conclusion.
    3.     Other Circuits
    The only other Circuit Court of Appeals to have
    squarely resolved the “who decides” issue is the Sixth, which
    has also held that “whether an arbitration agreement permits
    classwide arbitration is a gateway matter” that is
    presumptively “for judicial determination[.]” Reed Elsevier,
    Inc. v. Crockett, 
    734 F.3d 594
    , 599 (6th Cir. 2013) (internal
    quotation marks and citation omitted). Citing to Concepcion,
    Oxford Health, and Stolt-Nielsen, the Sixth Circuit Court
    reviewed the differences between classwide and bilateral
    arbitration and noted that “recently the [Supreme] Court has
    given every indication, short of an outright holding, that
    classwide arbitrability is a gateway question rather than a
    subsidiary one.” 
    Id. at 598.
    Specifically, the Sixth Circuit
    reasoned that
    13
    [g]ateway questions are fundamental to the
    manner in which the parties will resolve their
    dispute – whereas subsidiary questions, by
    comparison, concern details. And whether the
    parties arbitrate one claim or 1,000 in a single
    proceeding is no mere detail. Unlike the
    question whether, say, one party to an
    arbitration agreement has waived his claim
    against the other – which of course is a
    subsidiary question – the question whether the
    parties agreed to classwide arbitration is vastly
    more consequential than even the gateway
    question whether they agreed to arbitrate
    bilaterally. An incorrect answer in favor of
    classwide arbitration would “forc[e] parties to
    arbitrate” not merely a single “matter that they
    may well not have agreed to arbitrate” but
    thousands of them.
    
    Id. at 598-99
    (second alteration in original) (internal citation
    omitted) (quoting 
    Howsam, 537 U.S. at 84
    ). This analysis is
    persuasive and guides our own.
    Appellees argue that the First, Second and Eleventh
    Circuits have also considered the “who decides” question and
    have concluded that the availability of classwide arbitration is
    not a question of arbitrability for the court but rather a
    question of procedure for the arbitrator to decide. See S.
    Commc’ns Servs., Inc. v. Thomas, 
    720 F.3d 1352
    (11th Cir.
    2013); Fantastic Sams Franchise Corp. v. FSRO Ass’n Ltd.,
    
    683 F.3d 18
    (1st Cir. 2012); Jock v. Sterling Jewelers Inc.,
    
    646 F.3d 113
    (2d Cir. 2011). This is untrue, as none of those
    Circuits ruled, or even expressed a view, on the issue before
    us. The First Circuit’s decision in Fantastic Sams involved
    associational arbitration, not class arbitration, and expressly
    recognized that an “associational action . . . is [not] equivalent
    14
    to a class 
    action.” 683 F.3d at 23
    . In Jock, the Second
    Circuit noted repeatedly that the parties had submitted the
    question whether their contract allowed for classwide
    arbitration to the arbitrator, and so the “who decides”
    question was not before the Court. 
    See 646 F.3d at 116
    , 124.
    And far from holding that the availability of classwide
    arbitration is for the arbitrator to decide, the Eleventh Circuit
    has specifically stated that the question remains unresolved.
    See S. Commc’ns 
    Servs., 720 F.3d at 1359
    n.6 (“Like the
    Supreme Court, we also have not decided whether the
    availability of class arbitration is a question of
    arbitrability[.]”).
    Since Bazzle, the Supreme Court has not directly
    decided whether the availability of class arbitration is a
    question of arbitrability. The Court’s line of post-Bazzle
    opinions, however, indicates that, because of the fundamental
    differences between classwide and bilateral arbitration, and
    the consequences of proceeding with one rather than the
    other, the availability of classwide arbitrability is a
    substantive gateway question rather than a procedural one.
    We thus join the Sixth Circuit Court of Appeals in holding
    that the availability of class arbitration is a “question of
    arbitrability.”
    B.     There is no evidence rebutting the presumption that
    the District Court should decide     all   questions    of
    arbitrability.
    It is presumed that courts must decide questions of
    arbitrability “unless the parties clearly and unmistakably
    provide otherwise.” 
    Howsam, 537 U.S. at 83
    (internal
    quotation marks and citation omitted). The burden of
    overcoming the presumption is onerous, as it requires express
    contractual language unambiguously delegating the question
    of arbitrability to the arbitrator. See Major League Umpires
    15
    Ass’n v. Am. League of Prof’l Baseball Clubs, 
    357 F.3d 272
    ,
    280-81 (3d Cir. 2004). Silence or ambiguous contractual
    language is insufficient to rebut the presumption. Gen. Elec.
    Co. v. Deutz AG, 
    270 F.3d 144
    , 154-55 (3d Cir. 2001). Here,
    Opalinski and McCabe’s employment agreements provide for
    arbitration of any dispute or claim arising out of or relating to
    their employment but are silent as to the availability of
    classwide arbitration or whether the question should be
    submitted to the arbitrator. Nothing else in the agreements or
    record suggests that the parties agreed to submit questions of
    arbitrability to the arbitrator. Thus, the strong presumption
    favoring judicial resolution of questions of arbitrability is not
    undone, and the District Court had to decide whether the
    arbitration agreements permitted classwide arbitration.
    The District Court’s October 2011 Order directing the
    arbitrator to decide the availability of classwide arbitration,
    and December 2012 Order denying RHI’s motion to vacate
    the arbitrator’s partial final award, are reversed. This case is
    remanded for the District Court to determine whether
    Appellees’ employment agreements call for classwide
    arbitration.
    *   *   *    *   *
    “Arbitration is fundamentally a creature of contract,
    and an arbitrator’s authority is derived from an agreement to
    arbitrate.” 
    Puleo, 605 F.3d at 194
    (alteration in original)
    (internal quotation marks and citation omitted). Here, where
    we have an agreement to arbitrate individual disputes and no
    mention of arbitration for a wider group, we believe the
    parties would have expected a court, not an arbitrator, to
    determine the availability of class arbitration. This is
    especially so given the critical differences between individual
    and class arbitration and the significant consequences of that
    determination for both whose claims are subject to arbitration
    16
    and the type of controversy to be arbitrated. Hence we hold
    that the availability of class arbitration is a “question of
    arbitrability” for a court to decide unless the parties
    unmistakably provide otherwise.
    17