Goodwill and Other Intangible Assets Annual Impairment Testing (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Indefinite-lived Intangible Assets [Line Items]
Goodwill and other intangible assets	$ 8,300
Other intangible assets excluding goodwill	2,068	$ 2,083	$ 2,840
Goodwill	5,799	5,861	6,050
Divestiture Goodwill		191
Divestiture net intangibles	3	765
Indefinite-lived intangible assets acquired		18
North America
Indefinite-lived Intangible Assets [Line Items]
Other intangible assets excluding goodwill	1,238	1,238	1,985
Goodwill	4,423	4,422	$ 4,611
Divestiture Goodwill		191
Divestiture net intangibles	0	765
Indefinite-lived intangible assets acquired		$ 18
Pringles and cracker related trademarks | North America
Indefinite-lived Intangible Assets [Line Items]
Other intangible assets excluding goodwill	1,700
RXBAR
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 373