Benefit Plans - Additional Information (Details) $ in Millions		3 Months Ended		12 Months Ended
	Jul. 11, 2019 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) company	Dec. 31, 2023 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of insurance companies | company					2
Plan assets related to certain insurance contracts				$ 106	$ 96
Expense for defined contribution plans				75	68	$ 66
Accrued postretirement health care costs				$ 74	98
Fixed-income securities | U.S. and International Investment Grade Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage				75.00%
Mondelēz Global LLC Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Loss due to settlement			$ 282
Canadian Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Loss due to settlement		$ 54
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Period for recognition of net periodic benefit costs				4 years
U.S. Plans | North America | Bakery and Confectionery Union and Industry International Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Undiscounted withdrawal liability	$ 491			$ 294
Withdrawal liability payment term	20 years
Accreted interest				9	10	10
U.S. Plans | North America | Bakery and Confectionery Union and Industry International Pension Fund | Other current liabilities
Defined Benefit Plan Disclosure [Line Items]
Undiscounted withdrawal liability				16
U.S. Plans | North America | Bakery and Confectionery Union and Industry International Pension Fund | Other liabilities
Defined Benefit Plan Disclosure [Line Items]
Undiscounted withdrawal liability				278
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net pension asset				767	561
Pension Plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation				300	1,200
Employer contributions				10
Estimated future employer contributions				1
Net periodic postretirement (benefit)/cost				$ 286	$ (11)	(14)
Weighted-average discount rate				5.48%	5.18%
Rate of compensation cost increases				4.00%	4.00%
Pension Plans | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation				$ 6,600	$ 6,600
Employer contributions				78
Employee contributions				23
Estimated future employer contributions				77
Net periodic postretirement (benefit)/cost				$ 33	$ (22)	(4)
Weighted-average discount rate				4.59%	4.45%
Rate of compensation cost increases				3.08%	3.10%
Pension Plans | Non-U.S. Plans | Fixed-income securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage				56.00%
Pension Plans | Non-U.S. Plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage				12.00%
Pension Plans | Non-U.S. Plans | Buy-in annuity contracts
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage				27.00%
Pension Plans | Non-U.S. Plans | Real estate
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage				5.00%
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Current portion of accrued postretirement benefit obligation				$ 5	$ 11
Postretirement Benefit Plans | Multiemployer Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Multiemployer medical plan contributions				18	17	18
Postretirement Benefit Plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions				$ 10	$ 14
Weighted-average discount rate				5.55%	5.70%
Postretirement Benefit Plans | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted-average discount rate				5.98%	5.77%
Postemployment Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic postretirement (benefit)/cost				$ 20	$ 20	4
Weighted-average discount rate				6.30%	9.10%
Weighted-average ultimate annual turnover rate				0.70%	0.80%
Rate of compensation cost increases				4.00%	4.00%
Net gain for post-employment benefit plans expected to be amortized from AOCI into net periodic postemployment costs				$ 2
Postretirement Health Care Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic postretirement (benefit)/cost				$ (12)	$ (11)	$ (5)