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Fair Value (Schedule of Fair Value, by Balance Sheet Grouping, Measured on Recurring Basis) (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Jul. 01, 2016
Assets:    
Available-for-sale securities, Fair Value $ 1,178 $ 243
Recurring basis [Member]    
Assets:    
Cash and cash equivalents 1,174 230
Available-for-sale securities, Fair Value   6
Other current assets 4 10
Total assets 1,178 246
Liabilities:    
Accrued expenses   (3)
Derivative liabilities   (3)
Total liabilities   (3)
Recurring basis [Member] | Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]    
Assets:    
Cash and cash equivalents 592 230
Available-for-sale securities, Fair Value   0
Other current assets 1 2
Total assets 593 232
Liabilities:    
Accrued expenses   0
Derivative liabilities   0
Total liabilities   0
Recurring basis [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Assets:    
Cash and cash equivalents 582 0
Available-for-sale securities, Fair Value   6
Other current assets 3 8
Total assets 585 14
Liabilities:    
Accrued expenses   (3)
Derivative liabilities   (3)
Total liabilities   (3)
Recurring basis [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Assets:    
Cash and cash equivalents 0 0
Available-for-sale securities, Fair Value   0
Other current assets 0 0
Total assets $ 0 0
Liabilities:    
Accrued expenses   0
Derivative liabilities   0
Total liabilities   $ 0