Equity Method Investments - Impact of Change in Accounting Principle on Consolidated Financial Statements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Statements of Earnings
Equity method investment net earnings	$ 78	$ 121
Net earnings	968	743
Net earnings attributable to Mondelēz International	$ 961	$ 736
Earnings per share attributable to Mondelēz International:
Basic EPS (in dollars per share)	$ 0.68	$ 0.51
Diluted EPS (in dollars per share)	$ 0.68	$ 0.51
Statements of Other Comprehensive Earnings
Currency translation adjustment	$ (136)	$ (1,371)
Pension and other benefit plans	69	60
Derivative cash flow hedges	2	58
Total other comprehensive earnings/(losses)	(65)	(1,253)
Comprehensive earnings/(losses) attributable to Mondelēz International	$ 905	(512)
JDEP
Statements of Earnings
Equity method investment net earnings		121
Net earnings		743
Net earnings attributable to Mondelēz International		$ 736
Earnings per share attributable to Mondelēz International:
Basic EPS (in dollars per share)		$ 0.51
Diluted EPS (in dollars per share)		$ 0.51
Statements of Other Comprehensive Earnings
Currency translation adjustment		$ (1,371)
Pension and other benefit plans		60
Derivative cash flow hedges		58
Total other comprehensive earnings/(losses)		(1,253)
Comprehensive earnings/(losses) attributable to Mondelēz International		(512)
JDEP \| As Reported
Statements of Earnings
Equity method investment net earnings		138
Net earnings		760
Net earnings attributable to Mondelēz International		$ 753
Earnings per share attributable to Mondelēz International:
Basic EPS (in dollars per share)		$ 0.53
Diluted EPS (in dollars per share)		$ 0.52
Statements of Other Comprehensive Earnings
Currency translation adjustment		$ (1,511)
Pension and other benefit plans		79
Derivative cash flow hedges		60
Total other comprehensive earnings/(losses)		(1,372)
Comprehensive earnings/(losses) attributable to Mondelēz International		$ (614)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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