Equity Narratives (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 25, 2017	Mar. 31, 2017
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired		2,813,134
Treasury Stock, Value, Acquired, Par Value Method		$ 83.5
Treasury Stock Acquired, Average Cost Per Share		$ 29.67
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 284.8
Subsequent Event [Member]
Subsequent Event [Line Items]
Treasury Stock, Shares, Acquired	362,260
Treasury Stock, Value, Acquired, Par Value Method	$ 11.2
Treasury Stock Acquired, Average Cost Per Share	$ 30.88
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 273.6