Stockholder's Equity (Share Repurchase) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	9 Months Ended
	Jan. 31, 2018	Jun. 29, 2018	Jun. 29, 2018
Equity, Class of Treasury Stock [Line Items]
Share repurchase authorized date	Jan. 31, 2018
Authorized amount of stock for repurchase	$ 1,000.0
Stock repurchase program expiration date	Jan. 31, 2020
Stock repurchased		$ 240.3	$ 524.5
Stock repurchased (shares)		2.5	5.1
Average price of stock repurchased (in dollars per share)		$ 97.43	$ 102.06
Remaining amount authorized fro stock repurchase		$ 647.9	$ 647.9