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Performance Share Unit, Deferred Stock Unit, and Restricted Stock Activity (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Actual tax benefit realized for the tax deductions from the shares vested | $ 7 | $ 18 | $ 18

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- Definition Disclosure of the aggregate tax benefit realized from stock awards that vested. + References No definition available. + Details
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Namespace Prefix: | mdlz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration