Equity Method Investments - Impact of Change in Accounting Principle on Consolidated Financial Statements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Type [Extensible List]				mdlz:ChangeInAccountingMethodAccountedOfEarningsInEquityMethodInvestmentsMember
Statements of Earnings
Equity method investment net earnings	$ 106	$ 109	$ 227	$ 275
Net earnings	545	804	1,288	1,777
Net earnings attributable to Mondelēz International	$ 544	$ 803	$ 1,280	$ 1,770
Earnings per share attributable to Mondelēz International:
Basic EPS (in dollars per share)	$ 0.38	$ 0.56	$ 0.89	$ 1.22
Diluted EPS (in dollars per share)	$ 0.38	$ 0.55	$ 0.89	$ 1.21
Statements of Other Comprehensive Earnings
Currency translation adjustment	$ 81	$ 30	$ (1,290)	$ 193
Pension and other benefit plans	5	38	65	55
Derivative cash flow hedges	1	(62)	59	(127)
Total other comprehensive earnings/(losses)	87	6	(1,166)	121
Comprehensive earnings/(losses) attributable to Mondelēz International	627	807	115	1,890
Balance Sheet
Equity method investments	6,659		6,659			$ 7,178
Total Assets	64,194		64,194			64,515
Retained earnings	27,040		27,040			26,615
Accumulated other comprehensive losses	(11,419)		(11,419)			(10,254)
Total Mondelēz International shareholders' equity	26,018		26,018			27,241
Total equity	$ 26,097	26,143	$ 26,097	26,143	$ 25,820	27,317	$ 25,835	$ 25,602
As Reported
Statements of Earnings
Equity method investment net earnings		113		226
Net earnings		808		1,728
Net earnings attributable to Mondelēz International		$ 807		$ 1,721
Earnings per share attributable to Mondelēz International:
Basic EPS (in dollars per share)		$ 0.56		$ 1.19
Diluted EPS (in dollars per share)		$ 0.55		$ 1.18
Statements of Other Comprehensive Earnings
Currency translation adjustment		$ (33)		$ 157
Pension and other benefit plans		54		64
Derivative cash flow hedges		(62)		(131)
Total other comprehensive earnings/(losses)		(41)		90
Comprehensive earnings/(losses) attributable to Mondelēz International		$ 764		$ 1,810
Balance Sheet
Equity method investments						7,212
Total Assets						64,549
Retained earnings						26,653
Accumulated other comprehensive losses						(10,258)
Total Mondelēz International shareholders' equity						27,275
Total equity						$ 27,351