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Interest Expense Relating to Debt including Results from Discontinued Operations (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Oct. 01, 2012
Debt Instrument [Line Items]  
Interest expense $ 278us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
Senior unsecured notes  
Debt Instrument [Line Items]  
Interest expense 70us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
/ us-gaap_DebtInstrumentAxis
= mdlz_SeniorUnsecuredNotesMember
Exchanged Debt  
Debt Instrument [Line Items]  
Interest expense 171us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
/ us-gaap_DebtInstrumentAxis
= mdlz_ExchangeOfDebtMember
7.55% senior unsecured notes  
Debt Instrument [Line Items]  
Interest expense 24us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
/ us-gaap_DebtInstrumentAxis
= mdlz_SevenPointFiveFivePercentSeniorUnsecuredNotesMember
Capital leases and other  
Debt Instrument [Line Items]  
Interest expense $ 13us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
/ us-gaap_DebtInstrumentAxis
= mdlz_CapitalLeasesAndOtherMember