Foundations Retirement Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
First Tier Discretionary Match [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 29	$ 28	$ 30
Second Tier Discretionary Match [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost		$ 8	$ 7