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Acquisitions and Divestitures - Narrative (Details) € in Millions, £ in Millions, $ in Millions												12 Months Ended
	Jan. 03, 2022 USD ($)	Jan. 03, 2022 EUR (€)	Nov. 01, 2021 USD ($)	Nov. 01, 2021 AUD ($)	Apr. 01, 2021 USD ($)	Apr. 01, 2021 AUD ($)	Mar. 25, 2021 USD ($)	Mar. 25, 2021 GBP (£)	Jan. 04, 2021 USD ($)	Apr. 01, 2020 USD ($)	Jul. 16, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)
Business Acquisition [Line Items]
Acquisition-related costs												$ 25,000,000	$ 15,000,000	$ 3,000,000
Goodwill												21,978,000,000	21,895,000,000	20,848,000,000
Purchase consideration, net of cash received												833,000,000	1,136,000,000	284,000,000
North America
Business Acquisition [Line Items]
Goodwill												10,109,000,000	9,901,000,000
AMEA
Business Acquisition [Line Items]
Goodwill												3,365,000,000	3,250,000,000
Cheese Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations | AMEA
Business Acquisition [Line Items]
Proceeds from divestiture of businesses														161,000,000
Current assets divested														19,000,000
Non-current assets divested														96,000,000
Net pre-tax gain on divestiture														44,000,000
Decline in year-over-year net revenues due to business divestiture													55,000,000
Decline in year-over-year net operating income due to business divestiture													9,000,000
Divestiture-related costs													4,000,000	$ 6,000,000
Chipita
Business Acquisition [Line Items]
Acquisition-related costs												6,000,000
Acquisition integration costs												17,000,000
Chipita | Subsequent Event
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%	100.00%
Closing cash consideration	$ 1,500,000,000	€ 1,300
Debt assumed	400,000,000	400
Total purchase price	$ 1,900,000,000	€ 1,700
Gourmet Food
Business Acquisition [Line Items]
Closing cash consideration					$ 343,000,000	$ 450
Acquisition-related costs												7,000,000
Incremental net revenues from acquisition												49,000,000
Incremental operating income from acquisition												7,000,000
Indefinite-life intangible assets					41,000,000
Definite-life intangible assets					80,000,000
Goodwill					164,000,000
Property, plant and equipment					19,000,000
Inventory					18,000,000
Accounts receivables					25,000,000
Other assets					12,000,000
Operating right of use assets					5,000,000
Other current assets					3,000,000
Current liabilities					19,000,000
Long-term operating lease liabilities					$ 5,000,000
Gourmet Food | MaxFoods Pty Ltd. | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Proceeds from divestiture of businesses, net of cash divested			$ 41,000,000	$ 57
Incremental net revenues from acquisition												35,000,000
Incremental operating income from acquisition												5,000,000
Grenade
Business Acquisition [Line Items]
Acquisition-related costs												2,000,000
Incremental net revenues from acquisition												67,000,000
Incremental operating income from acquisition												6,000,000
Indefinite-life intangible assets							$ 82,000,000
Definite-life intangible assets							28,000,000
Goodwill							181,000,000
Property, plant and equipment							1,000,000
Inventory							11,000,000
Accounts receivables							18,000,000
Current liabilities							25,000,000
Purchase consideration, net of cash received							261,000,000	£ 188
Deferred tax liabilities							20,000,000
Long-term other liabilities							$ 15,000,000
Hu
Business Acquisition [Line Items]
Percentage of interests acquired									93.00%
Acquisition-related costs												9,000,000
Incremental net revenues from acquisition												38,000,000
Incremental operating income from acquisition												44,000,000
Indefinite-life intangible assets									$ 123,000,000
Definite-life intangible assets									51,000,000
Goodwill									202,000,000
Property, plant and equipment									1,000,000
Inventory									2,000,000
Accounts receivables									4,000,000
Current liabilities									5,000,000
Purchase consideration, net of cash received									229,000,000
Fair value of contingent consideration obligation									132,000,000
Reduction to contingent consideration liability												70,000,000
Pre-tax gain to step up investment to fair value and consolidate the company									9,000,000
After-tax gain to step up investment to fair value and consolidate the company									7,000,000
Amount of equity in the acquiree held by immediately before the acquisition date									$ 8,000,000
Percentage of equity in the acquiree held immediately before the acquisition date									7.00%
Long-term other liabilities									$ 132,000,000
Give & Go
Business Acquisition [Line Items]
Total purchase price										$ 1,139,000,000
Acquisition-related costs													15,000,000
Acquisition integration costs												6,000,000	2,000,000
Incremental net revenues from acquisition												106,000,000
Incremental operating income from acquisition												$ 6,000,000
Indefinite-life intangible assets										42,000,000
Definite-life intangible assets										511,000,000
Goodwill										531,000,000			531,000,000
Property, plant and equipment										136,000,000
Inventory										38,000,000
Accounts receivables										29,000,000
Operating right of use assets										61,000,000
Other current assets										6,000,000
Current liabilities										42,000,000
Long-term operating lease liabilities										56,000,000
Purchase consideration, net of cash received										1,136,000,000
Deferred tax liabilities										92,000,000
Long-term other liabilities										19,000,000
Give & Go | Customer Relationships
Business Acquisition [Line Items]
Definite-lived intangible assets acquired										$ 416,000,000
Estimated useful life of definite-lived intangible assets acquired										17 years
Goodwill expected to be deductible for income tax purposes										$ 0
Perfect Snacks | North America
Business Acquisition [Line Items]
Incremental net revenues from acquisition													$ 55,000,000
Indefinite-life intangible assets															$ 107,000,000
Definite-life intangible assets															31,000,000
Goodwill															150,000,000
Property, plant and equipment															1,000,000
Inventory															12,000,000
Accounts receivables															8,000,000
Current liabilities															13,000,000
Purchase consideration, net of cash received											$ 284,000,000
Deferred tax liabilities															3,000,000
Long-term other liabilities															$ 9,000,000

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