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
		Mar. 31, 2020	Mar. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		$ 27,351	$ 25,713
Less: other comprehensive (earnings)/loss attributable to noncontrolling interests		5	1
Total other comprehensive earnings/(losses)		(1,372)	131
Other comprehensive earnings/(losses)		(1,367)	132
Balance at end of period		25,752	25,909
Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(8,302)	(8,603)
Tax (expense)/benefit on gains/(losses)		(1,421)	168
Tax (expense)/benefit		(90)	22
Less: other comprehensive (earnings)/loss attributable to noncontrolling interests		5	1
Total other comprehensive earnings/(losses)		(1,511)	190
Balance at end of period		(9,808)	(8,412)
Pension and Other Benefits Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(1,744)	(1,860)
Tax (expense)/benefit on gains/(losses)		0	6
Net gains/(losses) arising during period		(5)	(24)
Tax expense/(benefit) on reclassifications	[1]	(8)	(7)
Currency impact	[1]	61	(1)
Total other comprehensive earnings/(losses)		79	10
Balance at end of period		(1,665)	(1,850)
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	[2]	25	32
Settlement losses and other expenses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings	[2]	6	4
Derivative Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(212)	(167)
Tax (expense)/benefit on gains/(losses)		14	8
Losses/(gains) reclassified into net earnings	[3]	105	0
Net gains/(losses) arising during period		(37)	(77)
Tax expense/(benefit) on reclassifications	[1]	(24)	0
Currency impact		2	0
Total other comprehensive earnings/(losses)		60	(69)
Balance at end of period		(152)	(236)
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		(10,258)	(10,630)
Total other comprehensive earnings/(losses)		(1,367)	132
Balance at end of period		$ (11,625)	$ (10,498)

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

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

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