Equity Narratives (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Jul. 30, 2018	Jun. 30, 2018
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired		6,066,472
Treasury Stock, Value, Acquired, Par Value Method		$ 228.9
Treasury Stock Acquired, Average Cost Per Share		$ 37.73
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 241.3
Subsequent Event [Member]
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired	869,229
Treasury Stock, Value, Acquired, Par Value Method	$ 32.2
Treasury Stock Acquired, Average Cost Per Share	$ 37.03
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 209.1