Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 29, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Income Tax Contingency [Line Items]
Income tax benefit associated with updated estimate for transition tax	$ 69		$ 101	$ 206	$ 246
Effective income tax rate	15.00%		26.00%	14.00%	23.00%
Employer discretionary contribution amount		$ 250
Discrete tax benefit	$ (44)
Reductions Credited To Income Tax Expense			$ (39)
Unrecognized tax benefits	51			$ 51		$ 60
Unrecognized tax benefits that would affect the effective income tax rate	40			40
Tax-related interest and penalties accrual	21			21
Other current liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits	2			2
Projected additions to unrecognized tax benefits	6			6
Tax Cuts and Jobs Act
Income Tax Contingency [Line Items]
Income tax benefit associated with updated estimate for transition tax	(16)			$ (16)
Effective income tax rate				21.00%		35.00%
Undistributed earnings of foreign subsidiaries	$ 2,600			$ 2,600