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Benefit Plans - Additional Information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 11, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Multiemployer Plan, Type [Extensible List] |  |  |  | us-gaap:PensionPlanMember
Multiemployer Plan, Pension, Significant, Name [Extensible List] |  |  |  | mdlz:BakeryAndConfectioneryUnionAndIndustryInternationalPensionFundMember
U.S. Plans | North America |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Multiemployer plan, withdrawal liability | $ 526 | $ 383 |  | $ 383
Multiemployer plan, withdrawal obligation term | 20 years |  |  |
Multiemployer plan, final adjustment to reduce withdrawal liability |  |  | $ 35 |
Multiemployer plan, final adjustment to reduce withdrawal liability, net of tax |  |  | $ 26 |
Multiemployer plan, accreted interest on the long-term liability |  | 3 |  | 6
Other current liabilities | U.S. Plans | North America |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Multiemployer plan, withdrawal liability |  | 14 |  | 14
Long-term other liabilities | U.S. Plans | North America |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Multiemployer plan, withdrawal liability |  | 369 |  | 369
Pension Plans | U.S. Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer contribution |  |  |  | 11
Estimated future employer contributions |  | 5 |  | 5
Pension Plans | Non-U.S. Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer contribution |  |  |  | 104
Estimated future employer contributions |  | $ 86 |  | 86
Pension Plans | United Kingdom and Ireland |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer contribution |  |  |  | $ 50

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- Definition Multiemployer Plans, Withdrawal Obligation, Period Charge + References No definition available. + Details
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- Definition Multiemployer Plans, Withdrawal Obligation, Period Charge, Net Of Tax + References No definition available. + Details
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