Quarterly Financial Data (Unaudited) - Summary of Operating Results (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 6,913		$ 6,355		$ 6,062		$ 6,538		$ 6,773		$ 6,288		$ 6,112		$ 6,765		$ 25,868	$ 25,938	$ 25,896
Gross profit	2,759		2,516		2,469		2,593		2,549		2,414		2,540		2,849		10,337	10,352	10,034
(Provision)/benefit for income taxes	(230)		633		(216)		(189)		(111)		(310)		(15)		(337)		(2)	(773)	(666)
Net (loss)/gain on equity method investment transactions	0		0		(25)		23		21		757		0		0		(2)	778	40
Equity method investment net earnings	105		111		113		113		149		80		87		232		442	548	344
Net earnings	729	[1]	1,428	[1]	808	[1]	920	[1]	826	[1]	1,197	[1]	320	[1]	1,052	[1]	3,885	3,395	2,842
Noncontrolling interest earnings	(3)		(5)		(1)		(6)		(3)		(3)		(2)		(6)		(15)	(14)	(14)
Net earnings attributable to Mondelēz International	$ 726		$ 1,423		$ 807		$ 914		$ 823		$ 1,194		$ 318		$ 1,046		$ 3,870	$ 3,381	$ 2,828
Weighted-average shares for basic EPS (in shares)	1,441		1,445		1,445		1,449		1,457		1,466		1,475		1,489		1,445	1,472	1,513
Plus incremental shares from assumed conversions of stock options and long-term incentive plan shares (in shares)	12		13		13		12		13		14		13		16		13	14	18
Weighted-average shares for diluted EPS (in shares)	1,453		1,458		1,458		1,461		1,470		1,480		1,488		1,505		1,458	1,486	1,531
Per share data:
Basic earnings per share attributable to Mondelēz International (in dollars per share)	$ 0.50		$ 0.98		$ 0.56		$ 0.63		$ 0.56		$ 0.81		$ 0.22		$ 0.70		$ 2.68	$ 2.30	$ 1.87
Diluted earnings per share attributable to Mondelēz International (in dollars per share)	0.50		0.98		0.55		0.63		0.56		0.81		0.21		0.70		$ 2.65	$ 2.28	$ 1.85
Dividends declared (in dollars per share)	$ 0.285		$ 0.285		$ 0.26		$ 0.26		$ 0.26		$ 0.26		$ 0.22		$ 0.22
Swiss Tax Administration | Foreign Tax Authority
Effect of Fourth Quarter Events [Line Items]
Reduction on deferred tax expense from impact of Swiss tax reform			$ 769

[1] 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.