Reportable Segments (Details) $ in Millions		3 Months Ended		6 Months Ended
	Jul. 28, 2019 USD ($)	Jun. 27, 2020 USD ($)	Jun. 29, 2019 USD ($)	Jun. 27, 2020 USD ($)	Jun. 29, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments				4
Net sales		$ 3,465	$ 3,461	$ 6,877	$ 6,983
Operating profit		506	397	966	778
Operating Segments
Segment Reporting Information [Line Items]
Operating profit		625	420	1,129	928
Operating Segments | North America
Segment Reporting Information [Line Items]
Net sales		2,167	2,148	4,264	4,437
Operating profit		464	322	830	702
Operating Segments | Europe
Segment Reporting Information [Line Items]
Net sales		546	541	1,072	1,038
Operating profit		92	36	162	96
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Net sales		223	239	450	464
Operating profit		31	17	53	38
Operating Segments | AMEA
Segment Reporting Information [Line Items]
Net sales		529	533	1,091	1,044
Operating profit		38	45	84	92
Corporate
Segment Reporting Information [Line Items]
Operating profit		$ (119)	(23)	$ (163)	(150)
Cookies, fruit and fruit-flavored snacks, pie crusts and ice cream cones businesses
Segment Reporting Information [Line Items]
Cash proceeds from sale of businesses	$ 1,300
Net assets	$ 1,300
Cookies, fruit and fruit-flavored snacks, pie crusts and ice cream cones businesses | North America
Segment Reporting Information [Line Items]
Net sales			$ 194		$ 507