Debt - Components of Notes Payable (Details) - USD ($) $ in Millions		Mar. 31, 2018	Dec. 30, 2017
Short-term Debt [Line Items]
Principal amount		$ 469	$ 370
U.S. commercial paper
Short-term Debt [Line Items]
Principal amount		$ 191	$ 196
Effective interest rate (a)		2.15%	1.76%
Europe commercial paper
Short-term Debt [Line Items]
Principal amount		$ 197	$ 96
Effective interest rate (a)	[1]	(0.31%)	(0.32%)
Bank borrowings
Short-term Debt [Line Items]
Principal amount		$ 81	$ 78

[1] Negative effective interest rates on certain borrowings in Europe are the result of efforts by the European Central Bank to stimulate the economy in the eurozone.