Income Taxes Unrecognized Tax Benefit Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Income Tax Disclosure [Abstract]
Income Tax Examination, Interest Expense	$ 2	$ 2	$ 3
Accrued tax-related interest and penalties	21	19	17
Balance at beginning of year	63	73	78
Additions, current year	6	6	8
Additions, prior year	5	1	9
Reducitons, prior year	(8)	(14)	(12)
Settlements, decreases	(4)		(10)
Settlements, increases		1
Lapse in statute of limitations	(2)	(4)	0
Balance at end of year	$ 60	$ 63	$ 73