Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017	Dec. 22, 2017
Income Tax Contingency [Line Items]
U.S. Federal Corporate Tax Rate prior to Tax Cuts and Jobs Act of 2017				35.00%
U.S. Federal Corporate Tax Rate after Tax Cuts and Jobs Act of 2017				21.00%
Effective income tax rate	13.00%	14.00%
Discrete tax benefit	$ 44
Undistributed earnings of foreign subsidiaries	2,600
Reductions Credited To Income Tax Expense		$ 38
Unrecognized tax benefits	63		$ 60
Projected additions to unrecognized tax benefits	6
Unrecognized tax benefits that would affect the effective income tax rate	50
Tax-related interest and penalties accrual	24
Other current liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 10