Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 28, 2018	Dec. 29, 2017
Income Tax Disclosure [Abstract]
Effective tax rate	17.00%	41.80%	16.50%	34.70%
Write-down of deferred tax assets balances due to changes in enacted tax rate		$ 58
Write-down of deferred tax assets balances due to changes in enacted tax rate, per diluted share (in dollars per share)		$ 0.48
Benefit from impact of lower tax rate		$ 26
Benefit from impact of lower tax rate, per diluted share (in dollars per share)		$ 0.21
Impact of releasing uncertain tax provisions and differences in tax accounting related to investments		$ 22
Impact of releasing uncertain tax provisions and differences in tax accounting related to investments per diluted share (in dollar per share)		$ 0.18
Deferred tax liability for netted foreign E&P	$ 19		$ 19
Increase in deferred tax liability due to potential cumulative basis differences in netted foreign E&P	$ 88		$ 88