Accumulated Other Comprehensive Earnings/(Losses) - Changes in the Accumulated Balance of Components of Other Comprehensive Earnings/(Losses) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		$ 26,247	$ 27,718	$ 26,958	$ 28,366
Total other comprehensive earnings/(losses)		96	(54)	1,030	(631)
less: other comprehensive (earnings)/loss attributable to noncontrolling interests		1	(10)	(23)	(2)
Other comprehensive earnings/(losses) attributable to Mondelēz International		97	(64)	1,007	(633)
Balance at end of period		26,229	27,891	26,229	27,891
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		(11,561)	(11,515)	(12,471)	(10,946)
Total other comprehensive earnings/(losses)		97	(64)	1,007	(633)
Balance at end of period		(11,464)	(11,579)	(11,464)	(11,579)
Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(10,149)	(10,177)	(11,017)	(9,574)
Net gain/(loss) arising during period		(60)	(18)	763	(608)
Tax effect		(20)	18	49	(3)
Other comprehensive earnings/(losses)		(80)	0	812	(611)
less: other comprehensive (earnings)/loss attributable to noncontrolling interests		1	(10)	(23)	(2)
Balance at end of period		(10,228)	(10,187)	(10,228)	(10,187)
Pension and Other Benefits Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(1,343)	(1,277)	(1,402)	(1,323)
Net gain/(loss) arising during period		14	0	(37)	(6)
Tax effect		85	0	98	1
Tax expense/(benefit) on reclassifications	[1]	(17)	(3)	(99)	(11)
Total other comprehensive earnings/(losses)		169	(52)	228	(6)
Balance at end of period		(1,174)	(1,329)	(1,174)	(1,329)
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]	13	14	44	40
Settlement losses and other expenses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Losses/(gains) reclassified into net earnings	[2]	54	3	346	9
Currency impact
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive earnings/(losses)		20	(66)	(124)	(39)
Derivative Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		(69)	(61)	(52)	(49)
Tax effect		(2)	0	0	(6)
Tax expense/(benefit) on reclassifications	[1]	(2)	5	6	3
Total other comprehensive earnings/(losses)		7	(2)	(10)	(14)
Balance at end of period		(62)	(63)	(62)	(63)
Derivative Cash Flow Hedges | Interest rate contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net gain/(loss) arising during period		(2)	1	(1)	(9)
Losses/(gains) reclassified into net earnings	[3]	1	1	4	7
Derivative Cash Flow Hedges | Cross-currency swap contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net gain/(loss) arising during period		(9)	(57)	(95)	(17)
Losses/(gains) reclassified into net earnings	[3]	11	51	90	(2)
Derivative Cash Flow Hedges | Other derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net gain/(loss) arising during period		5	(2)	(7)	(6)
Losses/(gains) reclassified into net earnings	[3]	0	0	0	4
Currency impact
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive earnings/(losses)		$ 1	$ (1)	$ (7)	$ 0

[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 9, Benefit Plans.

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