Reclassifications from Accumulated Other Comprehensive Income - Changes in the Accumulated Balance of Components of Other Comprehensive Earnings/(Losses) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		$ 25,820	$ 25,835	$ 27,317	$ 25,602
Less: other comprehensive (earnings)/loss attributable to noncontrolling interests		(4)	(2)	1	(1)
Total other comprehensive earnings/(losses)		87	6	(1,166)	121
Other comprehensive earnings/(losses) attributable to Mondelēz International		83	4	(1,165)	120
Balance at end of period		26,097	26,143	26,097	26,143
Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(9,686)	(8,458)	(8,320)	(8,622)
Currency impact		26	31	(1,255)	172
Tax (expense)/benefit		26	(1)	(64)	21
Less: other comprehensive (earnings)/loss attributable to noncontrolling interests		(4)	(2)	1	(1)
Total other comprehensive earnings/(losses)		81	30	(1,290)	193
Balance at end of period		(9,609)	(8,430)	(9,609)	(8,430)
Equity method investment transactions
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings	[1]	29	0	29	0
Pension and Other Benefits Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(1,661)	(1,837)	(1,721)	(1,854)
Currency impact		(18)	5	41	4
Net actuarial gain/(loss) arising during period		(2)	(20)	(24)	(32)
Tax (expense)/benefit before reclassifications		(1)	6	(1)	7
Tax expense/(benefit) on reclassifications	[2]	(7)	(11)	(15)	(18)
Total other comprehensive earnings/(losses)		5	38	65	55
Balance at end of period		(1,656)	(1,799)	(1,656)	(1,799)
Amortization of experience losses and prior service costs
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings	[3]	24	34	49	66
Settlement losses and other expenses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings	[1]	9	24	15	28
Derivative Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(155)	(233)	(213)	(168)
Currency impact		(1)	1	1	1
Losses/(gains) reclassified into net earnings	[1],[4]	8	12	113	12
Net actuarial gain/(loss) arising during period		(16)	(84)	(56)	(158)
Tax (expense)/benefit before reclassifications		11	9	26	18
Tax expense/(benefit) on reclassifications	[2]	(1)	0	(25)	0
Total other comprehensive earnings/(losses)		1	(62)	59	(127)
Balance at end of period		(154)	(295)	(154)	(295)
Accumulated other comprehensive income attributable to Mondelēz International
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(11,502)	(10,528)	(10,254)	(10,644)
Total other comprehensive earnings/(losses)		83	4	(1,165)	120
Balance at end of period		$ (11,419)	$ (10,524)	$ (11,419)	$ (10,524)

[1] These amounts include equity method investment transactions recorded within gain/(loss) on equity method investment transactions.

[2] Taxes reclassified to earnings are recorded within the provision for income taxes.

[3] These reclassified losses are included in net periodic benefit costs disclosed in Note 10, Benefit Plans.

[4] These reclassified gains or losses are recorded within interest and other expense, net.