Reclassifications from Accumulated Other Comprehensive Income - Changes in the Accumulated Balance of Components of Other Comprehensive Earnings/(Losses) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		$ 25,713	$ 26,074	$ 25,195
Less: other comprehensive (earnings)/loss attributable to noncontrolling interests		2	2	(28)
Total other comprehensive earnings/(losses)		370	(635)	1,149
Other comprehensive earnings/(losses)		372	(633)	1,121
Balance at end of period		27,351	25,713	26,074
Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(8,603)	(7,740)	(8,910)
Tax (expense)/benefit on gains/(losses)		250	(698)	984
Tax (expense)/benefit		49	(173)	214
Total other comprehensive earnings/(losses)		299	(865)	1,198
Balance at end of period		(8,302)	(8,603)	(7,740)
Equity method investment transactions
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings		0	6	0
Pension and Other Benefits Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(1,860)	(2,144)	(2,087)
Tax (expense)/benefit on gains/(losses)		20	(16)	50
Net gains/(losses) arising during period		(10)	36	(71)
Tax expense/(benefit) on reclassifications	[1]	(42)	(36)	(65)
Currency impact		(19)	92	(183)
Total other comprehensive earnings/(losses)		116	284	(57)
Balance at end of period		(1,744)	(1,860)	(2,144)
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		137	168	174
Settlement losses and other expenses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings		30	40	38
Derivative Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(167)	(113)	(121)
Tax (expense)/benefit on gains/(losses)		19	6	9
Net gains/(losses) arising during period		(224)	(58)	(17)
Tax expense/(benefit) on reclassifications	[1]	(1)	2	(6)
Currency impact		6	7	(11)
Total other comprehensive earnings/(losses)		(45)	(54)	8
Balance at end of period		(212)	(167)	(113)
Derivative Cash Flow Hedges | Currency exchange contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings		0	0	4
Derivative Cash Flow Hedges | Commodity contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings		0	0	29
Derivative Cash Flow Hedges | Interest rate contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings		155	(11)	0
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		(10,630)	(9,997)	(11,118)
Total other comprehensive earnings/(losses)		372	(633)	1,121
Balance at end of period		$ (10,258)	$ (10,630)	$ (9,997)

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