Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation and Other Disputes and Environmental Related to litigation, other disputes and environmental issues, we have an aggregate accrued contingent liability of $65.8 million and $11.3 million as of March 31, 2022 and December 31, 2021, respectively. While we cannot predict the eventual aggregate cost for litigation, other disputes and environmental matters in which we are currently involved, we believe adequate reserves have been provided for losses that are probable and estimable. For all matters other than discussed individually below, we believe that any reasonably possible losses in excess of the amounts accrued are immaterial to our unaudited condensed consolidated financial statements. Our litigation, other disputes and environmental issues are discussed in further detail within Part II—Item 8 Financial Statements, Note 18, "Commitments and Contingencies" in our Annual Report and did not significantly change during the first quarter of 2022, except as noted below. Other than those disclosed below, we are also involved in other disputes and legal actions arising in the ordinary course of our business. While it is not feasible to predict or determine the outcome of these proceedings, in our opinion, based on a review with legal counsel, other than as noted, none of these disputes or legal actions are expected to have a material impact on our business, consolidated financial position, results of operations or cash flows. However, litigation is subject to inherent uncertainties and an adverse result in these or other matters may arise from time to time that may harm our business. On February 12, 2018, Stone Brewing Company filed a trademark infringement lawsuit in federal court in the Southern District of California against Molson Coors Beverage Company USA LLC ("MCBC USA"), a wholly owned subsidiary of our Company, alleging that the Keystone brand has “rebranded” itself as “Stone” and is marketing itself in a manner confusingly similar to Stone Brewing Company's registered Stone trademark. Stone Brewing Company sought treble damages and disgorgement of MCBC USA's profit from Keystone sales. MCBC USA subsequently filed an answer and counterclaims against Stone Brewing Company. On May 31, 2018, Stone Brewing Company filed a motion to dismiss MCBC USA's counterclaims and for a preliminary injunction seeking to bar MCBC USA from continuing to use “STONE” on Keystone Light cans and related marketing materials. In March 2019, the court denied Stone Brewing Company’s motion for preliminary injunction and its motion to dismiss MCBC USA's counterclaims. The jury trial began on March 7, 2022. The jury returned a verdict in which it concluded that trademark infringement had occurred and awarded Stone Brewing Company $56.0 million in damages. The jury also found that no "willful" trademark infringement had occurred. The parties are currently briefing a series of post-trial issues including certain unsubmitted MCBC USA defenses. Resolution of the remaining defenses and other post-trial issues could alter or nullify the jury verdict. Stone Brewing Company also filed a motion for a permanent injunction, which MCBC USA plans to oppose. At the conclusion of these issues, either or both parties could appeal the case to the applicable federal appellate court. As of March 31, 2022, the Company has accrued a liability of $56.0 million within other liabilities on our unaudited condensed consolidated balance sheet as the best estimate of probable loss in this case based on the jury verdict. However, it is reasonably possible that the estimate of the loss could change in the near term based on the progression of the case, including any potential impact of the resolution of remaining defenses and other post-trial issues on the jury verdict as well as any appeals process. We will continue to monitor the status of the case and will adjust the accrual in the period in which any significant change occurs which could impact the estimate of the loss for this matter. Regulatory Contingencies In June 2019, the Ontario government adopted a bill that, if enacted, would terminate a 10-year Master Framework Agreement that was originally signed between the previous government administration and Molson Canada 2005, a wholly owned indirect subsidiary of our Company, Labatt Brewing Company Limited, Sleeman Breweries Ltd., and Brewers Retail Inc. in 2015 and dictates the terms of the beer distribution and retail systems in Ontario through 2025. The government has not yet proclaimed the bill as law. The impacts of these potential legislative changes are unknown at this time, but could have a negative impact on the results of operations, cash flows and financial position of the Americas segment. Molson Canada 2005 and the other Master Framework Agreement signatories are prepared to vigorously defend our rights and pursue legal recourse, should the Master Framework Agreement be unilaterally terminated by the enactment of the legislation. Guarantees and Indemnities We guarantee indebtedness and other obligations to banks and other third parties for some of our equity method investments and consolidated subsidiaries. As of March 31, 2022 and December 31, 2021, the unaudited condensed consolidated balance sheets include liabilities related to these guarantees of $38.7 million and $38.1 million, respectively. See Note 4, "Investments" for further detail. Separately, related to our Cervejarias Kaiser Brasil S.A. ("Kaiser") indemnities, we accrued $12.0 million and $7.2 million, in aggregate, as of March 31, 2022 and December 31, 2021, respectively. The maximum potential claims amount remaining for the Kaiser-related purchased tax credits was $73.8 million, based on foreign exchange rates as of March 31, 2022. Our Kaiser liabilities are discussed in further detail within Part II—Item 8 Financial Statements, Note 18, "Commitments and Contingencies" in our Annual Report and did not significantly change during the first quarter of 2022.