Acquisitions and Divestitures (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 01, 2020	Jul. 16, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Purchase consideration, net of cash received					$ 1,141	$ 0
Goodwill			$ 20,997		20,997		$ 20,848
Acquisition-related costs			10	$ 1	15	1
North America
Business Acquisition [Line Items]
Goodwill			9,854		9,854		9,356
AMEA
Business Acquisition [Line Items]
Goodwill			3,074		3,074		3,151
AMEA | Cheese Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Proceeds from divestiture of businesses				158			161
Current assets divested							19
Non-current assets divested							96
Pre-tax gain on divestiture				41			$ 44
Decline in year-over-year net revenues due to business divestiture			22		55
Decline in year-over-year net operating income due to business divestiture			5		9
Reversal of divestiture-related costs accruals no longer required			2		2
Divestiture-related costs				$ 11		$ 10
Give & Go
Business Acquisition [Line Items]
Purchase consideration, net of cash received	$ 1,141
Definite-lived intangible assets	511
Indefinite-lived intangible assets	42
Goodwill	530
Property, plant and equipment	136
Operating right of use assets	71
Inventory	38
Accounts receivables	29
Other current assets	3
Current liabilities	41
Deferred tax liabilities	83
Long-term operating lease liabilities	66
Long-term debt	7
Long-term other liabilities	$ 19
Incremental net revenues from acquisition			91		91
Incremental operating loss from acquisition			8		8
Acquisition-related costs			10		15
Perfect Snacks | North America
Business Acquisition [Line Items]
Purchase consideration, net of cash received		$ 284
Definite-lived intangible assets		31
Indefinite-lived intangible assets		107
Goodwill		150
Property, plant and equipment		1
Inventory		12
Accounts receivables		8
Current liabilities		13
Deferred tax liabilities		3
Long-term other liabilities		$ 9
Incremental net revenues from acquisition			$ 23		$ 55