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Debt Short Term Borrowings (Details)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2014
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2014
Factoring Arrangement
USD ($)
Dec. 31, 2013
Factoring Arrangement
USD ($)
Dec. 31, 2014
Line Of Credit - CAD
CAD
Dec. 31, 2014
Line Of Credit - GBP
Dec. 31, 2014
Overdraft facility - GBP
GBP (£)
Dec. 31, 2014
Line Of Credit - YEN
USD ($)
Dec. 31, 2014
Line Of Credit - YEN
JPY (¥)
Dec. 31, 2014
Line Of Credit YEN 500M [Member] [Domain]
JPY (¥)
Dec. 31, 2014
Overdraft facility (USD)
May 03, 2012
Senior Notes
USD ($)
Oct. 06, 2010
Senior Notes
USD ($)
Jun. 15, 2007
Senior Notes
Convertible Senior Notes Due 2013 $575 Million 2.5% [Member]
USD ($)
Dec. 31, 2013
Revolving Credit Facility
USD ($)
Dec. 31, 2013
Commercial Paper Program
USD ($)
Jun. 30, 2014
Commercial Paper Program
USD ($)
Mar. 30, 2013
Commercial Paper Program
USD ($)
Jun. 30, 2014
Revolving Credit Facility
USD ($)
Dec. 31, 2014
Central Europe
USD ($)
Sep. 30, 2014
Central Europe
EUR (€)
Sep. 10, 2012
Central Europe
EUR (€)
Dec. 31, 2014
Japan, Yen
Line of Credit
USD ($)
Dec. 31, 2013
Japan, Yen
Line of Credit
USD ($)
Debt Instrument [Line Items]                                                  
Debt Instrument, Face Amount                         $ 1,900,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 $ 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 $ 575,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= tap_ConvertibleSeniorNotesDue2013575Million25Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		                    
Commercial Paper Outstanding, Amount                                 379,800,000tap_CommercialPaperOutstandingAmount
/ us-gaap_LongtermDebtTypeAxis
= tap_CommercialPaperProgramMember		                
Debt Instrument, Basis Spread on Variable Rate             1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditGbpMember		   1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditYenMember		 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditYenMember		   1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= tap_OverdraftfacilityUSDMember		                          
Line of credit facility, maximum borrowing capacity   750,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity       30,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditCadMember		   20,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= tap_OverdraftFacilityGbpMember		   1,500,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditYenMember		 500,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditYEN500MMemberDomain		             750,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= tap_CommercialPaperProgramMember		 950,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= tap_CommercialPaperProgramMember		     100,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_StatementBusinessSegmentsAxis
= tap_CentralEuropeMember		 150,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_StatementBusinessSegmentsAxis
= tap_CentralEuropeMember		    
Line of Credit Facility, Fair Value of Amount Outstanding                               137,400,000us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		                  
Debt Issuance Cost                                       1,800,000us-gaap_DebtIssuanceCosts
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember		          
Line of Credit Facility, Interest Rate Description             GBP LIBOR +1.5%   base rate of less than 1.0% base rate of less than 1.0%                              
Letters of Credit Outstanding, Amount 58,300,000us-gaap_LettersOfCreditOutstandingAmount               575,000,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= tap_LineOfCreditYenMember		                                
Short-term borrowings       5,600,000us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= tap_FactoringArrangementMember		 4,800,000us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= tap_FactoringArrangementMember		                                     4,900,000us-gaap_ShortTermBorrowings
/ us-gaap_CurrencyAxis
= currency_JPY
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember		 3,100,000us-gaap_ShortTermBorrowings
/ us-gaap_CurrencyAxis
= currency_JPY
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
Weighted average effective interest rate                                 0.49%us-gaap_ShortTermDebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= tap_CommercialPaperProgramMember		                
Debt instrument, remaining term to maturity (tenor)                                 1133 hours                
Bank Overdrafts 64,600,000us-gaap_BankOverdrafts   0us-gaap_BankOverdrafts                                   64,600,000us-gaap_BankOverdrafts
/ us-gaap_StatementBusinessSegmentsAxis
= tap_CentralEuropeMember		        
Cash Held in Bank                                         80,000,000tap_CashHeldinBank
/ us-gaap_StatementBusinessSegmentsAxis
= tap_CentralEuropeMember		        
Cash Held in Bank, Net of Bank Overdrafts                                         $ 15,400,000tap_CashHeldinBankNetofBankOverdrafts
/ us-gaap_StatementBusinessSegmentsAxis
= tap_CentralEuropeMember