Recently Adopted Accounting Pronouncements Recent Accounting Pronouncements (Details) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 29, 2017 USD ($)	Dec. 29, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefit from share-based compensation, operating activities	$ 5	$ 27
Retained Earnings | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	70	70
Retained Earnings | Accounting Standards Update 2016-09 | Windfall Tax Benefit, Unrecognized
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	58	58
Retained Earnings | Accounting Standards Update 2016-09 | Cumulative Adjustment, Change in Accounting Policy
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	19	19
Retained Earnings | Accounting Standards Update 2016-09 | Cumulative Adjustment, Change in Accounting Policy, Tax Impact
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ (7)	$ (7)