Divestitures and Acquisitions (Details) € in Millions, $ in Millions, $ in Millions, ¥ in Billions														1 Months Ended	3 Months Ended									12 Months Ended
	Jul. 16, 2019 USD ($)	Jun. 07, 2018 USD ($)	Dec. 28, 2017 USD ($)	Dec. 28, 2017 JPY (¥)	Oct. 23, 2017 EUR (€)	Oct. 23, 2017 USD ($)	Aug. 17, 2017 EUR (€) agreement	Aug. 17, 2017 USD ($) agreement	Jul. 04, 2017 AUD ($)	Jul. 04, 2017 USD ($)	Apr. 28, 2017 EUR (€)	Apr. 28, 2017 USD ($)	Mar. 31, 2016 USD ($)	May 31, 2016 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Jun. 07, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Acquisition And Dispositions [Line Items]
Payment to acquire business, net of cash received																								$ 284		$ 528	$ 0
Goodwill															$ 20,848				$ 20,725				$ 21,085	20,848		20,725	21,085
Divestiture transaction costs															0	$ 3	$ 41	$ 0						44		0	186
Divestiture-related costs															0	4	(11)	$ 1	(2)	$ 0	$ 0	$ 3
Proceeds from sale of property, plant and equipment and other																								82		398	109
Intangible asset impairment																								57		68
Trademarks
Acquisition And Dispositions [Line Items]
Intangible asset impairment																								57			1
North America
Acquisition And Dispositions [Line Items]
Goodwill															9,356				9,173					9,356		9,173
AMEA
Acquisition And Dispositions [Line Items]
Goodwill															3,151				3,210					3,151		3,210
Europe
Acquisition And Dispositions [Line Items]
Goodwill															7,523				$ 7,519					7,523		$ 7,519
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Cheese Business | AMEA
Acquisition And Dispositions [Line Items]
Proceeds from divestiture of businesses																								161
Current assets divested															19									19
Non-current assets divested															$ 96									96
Divestiture transaction costs																								2
Net pre-tax gain on divestiture																								44
Discontinued Operations, Disposed of by Sale | Japan | AMEA
Acquisition And Dispositions [Line Items]
Proceeds from divestiture of businesses			$ 24	¥ 2.8
Discontinued Operations, Disposed of by Sale | Australia and New Zealand
Acquisition And Dispositions [Line Items]
Proceeds from divestiture of businesses									$ 456	$ 347
Divestiture transaction costs									$ 247	187
Disposal group, including discontinued operation, other current assets										27
Disposal group, including discontinued operation, other non current assets										135
Disposal group, including discontinued operation, other current liabilities										$ 4
Divestiture-related costs																											2
Gain (loss) on foreign currency derivatives																											(3)
Inventory-related working capital adjustment																							3				3
Gain (loss) on inventory working capital adjustment																							$ 190
Discontinued Operations, Disposed of by Sale | France
Acquisition And Dispositions [Line Items]
Divestiture transaction costs																											(3)
Disposal group, including discontinued operation, other current assets												$ 44
Disposal group, including discontinued operation, other non current assets												155
Disposal group, including discontinued operation, other current liabilities												8
Divestiture-related costs																											$ 27	$ 84
Proceeds from sale of property, plant and equipment and other											€ 157	169
Disposal group, including discontinued operation, other non current liabilities												$ 22
Discontinued Operations, Disposed of by Sale | France | Trademarks
Acquisition And Dispositions [Line Items]
Intangible asset impairment													$ 14	$ 5
Discontinued Operations, Disposed of by Sale | The Kraft Heinz Company | Europe
Acquisition And Dispositions [Line Items]
Proceeds from divestiture of businesses					€ 2	$ 3	€ 9	$ 11
Number of agreements entered into to terminate licenses | agreement							2	2
Perfect Snacks
Acquisition And Dispositions [Line Items]
Goodwill																$ 150
Perfect Snacks | North America
Acquisition And Dispositions [Line Items]
Payment to acquire business, net of cash received	$ 284
Definite-life intangible assets acquired	31
Indefinite-lived intangible assets acquired	107
Goodwill	150
Property, plant and equipment acquired	1
Inventory acquired	12
Accounts receivables acquired	8
Current liabilities assumed	13
Deferred tax liabilities assumed	3
Other liabilities assumed	$ 9
Incremental net revenues from acquisition																								$ 53
Tate’s Bake Shop | North America
Acquisition And Dispositions [Line Items]
Payment to acquire business, net of cash received		$ 528															527
Definite-life intangible assets acquired																	45
Indefinite-lived intangible assets acquired																	205
Goodwill		$ 298															297
Property, plant and equipment acquired																	16
Inventory acquired																	5
Accounts receivables acquired																	9
Current liabilities assumed																	7
Deferred tax liabilities assumed																	$ 43
Incremental net revenues from acquisition																									$ 35