Divestiures, West Africa Investments and Acquisitions RXBAR Acquisition Narrative (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended								12 Months Ended
		Oct. 31, 2017	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 28, 2019		Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired											$ 8		$ 28	$ 592
Goodwill, purchase accounting adjustments													0
Net sales			$ 3,223	$ 3,372	$ 3,461	$ 3,522	$ 3,317	$ 3,469	$ 3,360	$ 3,401	13,578		13,547	12,854
Operating profit											1,401		1,706	1,387
RXBAR
Business Acquisition [Line Items]
Payments to acquire businesses, gross		$ 600
Payments to acquire businesses, net of cash acquired		596
Goodwill, purchase accounting adjustments		$ (1)
North America
Business Acquisition [Line Items]
Goodwill, purchase accounting adjustments													0
Net sales											8,390		8,688	8,673
Operating profit	[1]										$ 1,215	[2]	$ 1,397	1,246
North America | RXBAR
Business Acquisition [Line Items]
Net sales														27
Operating profit														$ 1

[1] Corporate operating profit in 2019 includes the cost of certain global research and development activities that were previously included in the North America reportable segment in 2018 and 2017 totaling approximately $48 million and $47 million, respectively.

[2] During 2019, North America operating profit includes the recognition of multi-employer pension plan exit liabilities totaling $132 million.