Benefit Plans - Narrative (Details) $ in Millions				3 Months Ended			9 Months Ended
	Sep. 11, 2025 USD ($)	Jun. 12, 2025 USD ($)	Jul. 11, 2019 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2024 company	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Third party insurance companies | company					2
Mondelēz Global LLC Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement losses		$ 282
Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Settlement losses	$ 54
U.S. Plans | North America
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plan, withdrawal obligation term			20 years
Multiemployer plan, withdrawal liability			$ 491	$ 298			$ 298
Multiemployer plan, accreted interest on the long-term liability				2		$ 2	7	$ 7
Other current liabilities | U.S. Plans | North America
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plan, withdrawal liability				16			16
Long-term other liabilities | U.S. Plans | North America
Defined Benefit Plan Disclosure [Line Items]
Multiemployer plan, withdrawal liability				282			282
Pension Plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions							2
Estimated future employer contributions over the remainder of the year				9			9
Settlement losses				0		3	292	9
Net periodic pension (benefit)/cost				(5)		(4)	283	(12)
Pension Plans | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions							62
Estimated future employer contributions over the remainder of the year				6			6
Settlement losses				54		0	54	0
Net periodic pension (benefit)/cost				49		(4)	39	(16)
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension (benefit)/cost				(3)		(3)	(9)	(8)
Postemployment Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension (benefit)/cost				$ 5		$ 5	$ 16	$ 16