Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended
	Jun. 29, 2018	Dec. 31, 2017	Dec. 29, 2017	Jun. 30, 2017	Jun. 29, 2018	Jun. 29, 2018	Jun. 30, 2017	Sep. 29, 2017
Income Taxes
Income tax expense	$ 81			$ 71		$ 789	$ 164
Income tax benefit resulting from lapses of applicable statutes of limitations	17					34	24
Income tax benefit associated with pre-separation tax matters				$ 14			14
Income tax expense related to tax impacts of Tax Cuts and Jobs Act			$ 567			567
Net income tax benefit related to certain legal entity restructurings						61
Income tax benefit associated with intercompany transactions and the corresponding reduction in the valuation allowance for U.S. tax loss carryforwards							$ 52
Accrued interest and penalties related to uncertain tax positions	60				$ 60	60		$ 60
Income tax expense related to interest and penalties						2
Unrecognized income tax benefits, approximate amount that could be resolved in next twelve months	$ 30				$ 30	$ 30
U.S. federal corporate income tax rate		35.00%			21.00%
Income tax benefit related to the reduction in the valuation allowance recorded against certain U.S. federal tax credit carryforwards			34
Revalued beginning deferred tax asset related to interest carryforwards			$ 223