Taxes on Earnings Taxes on Earnings (SAB 118 Impact) (Details) - Tax Cut and Jobs Act 2017 [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Apr. 29, 2018	Apr. 29, 2018
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax Expense (Benefit)	$ (4)	$ 179
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)	$ 0	$ (59)