Shareholders' Equity - Stock Option Activity (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
	Dec. 28, 2018 USD ($) $ / shares shares	Dec. 28, 2018 USD ($) $ / shares shares
Number of Shares
Options outstanding, beginning balance, shares | shares		4.8
Exercised, shares | shares		(0.2)
Canceled or expired, shares | shares		(0.3)
Options outstanding, ending balance, shares | shares	4.3	4.3
Exercisable, period end, shares | shares	3.1	3.1
Weighted Average Exercise Price Per Share
Options outstanding, beginning balance, exercise price, in dollars per share | $ / shares		$ 64.23
Exercised, exercise price, in dollars per share | $ / shares		37.64
Canceled or expired, exercise price, in dollars per share | $ / shares		79.73
Options outstanding, ending balance, exercise price, in dollars per share | $ / shares	$ 64.73	64.73
Exercisable, period end, exercise price, in dollars per share | $ / shares	$ 69.86	$ 69.86
Aggregate Intrinsic Value
Exercised, intrinsic value | $		$ 0
Options outstanding, ending balance, intrinsic value | $	$ 1	1
Exercisable, period end, intrinsic value | $	$ 1	$ 1
Options outstanding, weighted average remaining contractual term	3 years 4 months
Exercisable, period end, weighted average remaining contractual life	2 years 11 months