Fair Value (Schedule of Fair Value, by Balance Sheet Grouping, Measured on Recurring Basis) (Details) - Recurring basis [Member] - USD ($) $ in Millions	Sep. 29, 2017	Jun. 30, 2017
Assets:
Cash and cash equivalents	$ 826	$ 1,174
Other current assets	4	4
Total assets	830	1,178
Quoted Prices in Active Markets for Identical Instruments (Level 1) [Member]
Assets:
Cash and cash equivalents	622	593
Other current assets	1	1
Total assets	623	594
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash and cash equivalents	204	581
Other current assets	3	3
Total assets	207	584
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Cash and cash equivalents	0	0
Other current assets	0	0
Total assets	$ 0	$ 0