Equity Method Investments - Summarized Financial Information of Equity Method Investments (Details) - USD ($) $ in Millions		3 Months Ended												12 Months Ended
		Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 08, 2016
Summary Balance Sheet for Equity Method Investments
Current assets		$ 9,979								$ 7,630				$ 9,979	$ 7,630
TOTAL ASSETS		67,810								64,515				67,810	64,515	$ 62,618
Current liabilities		15,159								15,322				15,159	15,322
TOTAL LIABILITIES		40,156								37,198				40,156	37,198
Equity attributable to shareowners of investees		27,578								27,241				27,578	27,241
Equity attributable to noncontrolling interests		76								76				76	76
TOTAL EQUITY		27,654								27,317				27,654	27,317	25,602	$ 26,025
Equity method investments	[1]	6,036								7,178				6,036	7,178
Net revenues		7,298		$ 6,665		$ 5,911		$ 6,707		6,913	$ 6,355	$ 6,062	$ 6,538	26,581	25,868	25,938
Gross profit		2,872		2,792		2,331		2,451		2,759	2,516	2,469	2,593	10,446	10,337	10,352
Income from continuing operations														3,853	3,843	3,312
Net earnings		1,159	[2]	1,122	[2]	545	[2]	743	[2]	736	1,431	804	973	3,569	3,944	3,331
Net earnings attributable to Mondelēz International		1,156		1,119		544		736		733	1,426	803	967	3,555	3,929	3,317
Equity method investment net earnings		$ 110		$ 84		$ 106		$ 121		$ 112	$ 114	$ 109	$ 166	421	501	$ 484
Adjustment Due to Change in Accounting Basis
Summary Balance Sheet for Equity Method Investments
Difference between U.S. GAAP accounting basis for equity method investments and the investees' equity														$ 519	$ 333
Minimum
Summary Balance Sheet for Equity Method Investments
Mondelēz International ownership interests		8.00%								13.00%				8.00%	13.00%	13.00%
Maximum
Summary Balance Sheet for Equity Method Investments
Mondelēz International ownership interests		50.00%								50.00%				50.00%	50.00%	50.00%
JDE and JDEP
Summary Balance Sheet for Equity Method Investments
Equity method investment net earnings														$ 421	$ 501	$ 472
Keurig
Summary Balance Sheet for Equity Method Investments
Mondelēz International ownership interests																		24.20%
Equity method investment net earnings														0	0	12
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Summary Balance Sheet for Equity Method Investments
Current assets		$ 5,922								$ 5,523				5,922	5,523
Noncurrent assets		72,941								69,587				72,941	69,587
TOTAL ASSETS		78,863								75,110				78,863	75,110
Current liabilities		11,784								9,823				11,784	9,823
Noncurrent liabilities		27,752								28,193				27,752	28,193
TOTAL LIABILITIES		39,536								38,016				39,536	38,016
Equity attributable to shareowners of investees		39,161								37,058				39,161	37,058
Equity attributable to noncontrolling interests		166								36				166	36
TOTAL EQUITY		$ 39,327								$ 37,094				39,327	37,094
Net revenues														20,112	19,361	14,419
Gross profit														9,856	9,781	5,989
Income from continuing operations														2,078	2,216	1,753
Net earnings														2,078	2,216	1,753
Net earnings attributable to Mondelēz International														$ 2,070	$ 2,206	$ 1,742

[1] Includes a basis difference of approximately $519 million as of December 31, 2020 and $333 million as of December 31, 2019 between the U.S. GAAP accounting basis for our equity method investments and the U.S. GAAP accounting basis of our investees’ equity.

[2] The third quarter of 2019 was significantly impacted by the $769 million net deferred tax benefit related to Swiss tax reform. Refer to Note 16, Income Taxes, for more information.