Book Value of Indefinite Lived Intangibles, Fair Value Over Book Value, Ten Percent Or Less

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Goodwill and Intangible Assets Disclosure [Line Items]

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Impairment of Intangible Assets, Number Of Brands With Impairment Charges

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Number Of Indefinite Lived Intangibles Fair Value Over Book Value 10% or Less

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Weighted-average period of amortization for finite-lived intangible asset acquired in business combination, asset acquisition, and from joint venture formation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of impairment loss for indefinite-lived intangible asset. Excludes goodwill.

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Goodwill and Intangible Assets - Narrative (Details)	3 Months Ended			6 Months Ended
Goodwill and Intangible Assets - Narrative (Details)	Jun. 30, 2026 USD ($) brand	Mar. 31, 2026 USD ($) brand	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) brand	Jun. 30, 2025 USD ($)
Goodwill and Intangible Assets Disclosure [Line Items]
Estimated useful life				16 years
Amortization expense for intangible assets \| $	$ 26,000,000		$ 38,000,000	$ 53,000,000	$ 75,000,000
Goodwill, impairment loss \| $				$ 0
Indefinite-lived intangible asset impairment charges \| $		$ 33,000,000
Number of brands with fair value in excess of book value of 10% or less	5			5
Brands
Goodwill and Intangible Assets Disclosure [Line Items]
Book value of brands with fair value in excess of book value of 10% or less \| $	$ 1,500,000,000			$ 1,500,000,000
With Recognized Impairment
Goodwill and Intangible Assets Disclosure [Line Items]
Number of brands with fair value in excess of book value of 10% or less	4			4
Europe \| Biscuits
Goodwill and Intangible Assets Disclosure [Line Items]
Number of brands with impairment charges		2
AMEA \| Biscuits
Goodwill and Intangible Assets Disclosure [Line Items]
Number of brands with impairment charges		1
Latin America \| Candy
Goodwill and Intangible Assets Disclosure [Line Items]
Number of brands with impairment charges		1