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Goodwill and Intangible Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Line Items]      
Amortization expense for intangible assets $ 46us-gaap_AmortizationOfIntangibleAssets $ 54us-gaap_AmortizationOfIntangibleAssets  
Estimated amortization expense in year 1 190us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
Estimated amortization expense in year 2 190us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
Estimated amortization expense in year 3 190us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
Estimated amortization expense in year 4 190us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
Estimated amortization expense in year 5 190us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Number of brands     3mdlz_NumberOfIndefiniteLivedIntangiblesFairValueOverBookValueTenPercentOrLess
Intangible asset, aggregate book value 18,017us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill   18,810us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Fair Value Over Book Value 10% or Less      
Goodwill and Intangible Assets Disclosure [Line Items]      
Intangible asset, aggregate book value     341us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_FairValueByMeasurementBasisAxis
= mdlz_FairValueOverBookValueTenPercentOrLessMember
Asia Pacific and Europe      
Goodwill and Intangible Assets Disclosure [Line Items]      
Asset impairment charges on intangible assets     $ 57us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
/ us-gaap_StatementBusinessSegmentsAxis
= mdlz_AsiaPacificAndEuropeMember
Weighted Average      
Goodwill and Intangible Assets Disclosure [Line Items]      
Life of our amortizable intangible assets (in years) 13 years 3 months 18 days