Income From Continuing Operations Per Common Share - Computation of Income From Continuing Operations Per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 29, 2017	Dec. 30, 2016
Earnings Per Share [Abstract]
Income from continuing operations	$ 139	$ 163	$ 306	$ 308
Adjustments for participating securities outstanding	0	0	(1)	0
Income from continuing operations used in per basic and diluted common share calculations (A)	$ 139	$ 163	$ 305	$ 308
Basic weighted average common shares outstanding (B) (in shares)	118,500,000	123,700,000	118,800,000	123,800,000
Impact of dilutive share-based awards (in shares)	2,400,000	1,700,000	2,300,000	1,700,000
Diluted weighted average common shares outstanding (C) (in shares)	120,900,000	125,400,000	121,100,000	125,500,000
Income from continuing operations per basic common share (A)/(B) (in dollars per share)	$ 1.17	$ 1.32	$ 2.57	$ 2.49
Income from continuing operations per diluted common share (A)/(C) (in dollars per share)	$ 1.15	$ 1.30	$ 2.52	$ 2.45
Outstanding antidilutive employee stock options (in shares)			222	1,200,708