Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended			12 Months Ended
	Dec. 22, 2017	Dec. 29, 2017	Dec. 30, 2016	Jun. 29, 2018	Dec. 29, 2017	Dec. 30, 2016	Jun. 29, 2018
Income Tax Contingency [Line Items]
Statutory tax rate	35.00%
Estimated write-down to deferred tax assets balance due to changes in enacted tax rate		$ 52
Estimated write-down to deferred tax asset balance per diluted share (in dollars per share)		$ 0.43
Tax benefit from the impact of lower corporate tax rates in estimated annual rate for fiscal year		$ 26
Tax benefit from the impact of lower corporate tax rates in estimated annual rate for fiscal year, per diluted share (in dollars per share)		$ 0.21
Effective tax rate		39.30%	30.60%		33.50%	29.70%
Income tax expense, adjustment due to changes in enacted tax rate		$ 22
Income tax expense, adjustment due to changes in enacted tax rate, per diluted share (in dollars per share)		$ 0.18
Deferred tax liability for netted foreign E&P		$ 25			$ 25
Increase in deferred tax liability due to potential cumulative basis differences in netted foreign E&P		$ 116			$ 116
Scenario, Forecast
Income Tax Contingency [Line Items]
Statutory tax rate				21.00%			28.00%