Subsequent Events - IT Services Divestiture (Details) - USD ($) $ in Millions		6 Months Ended
	Jan. 26, 2017	Dec. 30, 2016	Jul. 01, 2016
Subsequent Event [Line Items]
Defined benefit plans, estimated voluntary Future Employer contributions in current fiscal year		$ 400
Assets
Current assets		344	$ 112
Liabilities
Current liabilities		67	$ 91
Discontinued Operations, Held-for-sale | IT Services
Assets
Current assets		270
Goodwill		460
Other intangible assets		250
Other assets		20
Liabilities
Current liabilities		$ 110
Subsequent Event | Discontinued Operations, Held-for-sale | IT Services
Subsequent Event [Line Items]
Proceeds from divestiture of business, less assumption of debt-like items	$ 690
Defined benefit plans, estimated voluntary Future Employer contributions in current fiscal year	$ 400