Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Oct. 31, 2017	Mar. 31, 2018	Apr. 01, 2017
Business Acquisition [Line Items]
Purchase price adjustment		$ (1)
Amortization		3	$ 2
Net sales		3,401	3,248
Operating profit		510	$ 280
RXBAR
Business Acquisition [Line Items]
Payments to acquire business, net of cash	$ 596
Payments to acquire business, gross	$ 600
Purchase price adjustment		(1)
North America Other
Business Acquisition [Line Items]
Purchase price adjustment		(1)
Amortization		0
North America Other | RXBAR
Business Acquisition [Line Items]
Net sales		$ 51