Subsequent Event (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Jul. 31, 2019	Jun. 30, 2019	Mar. 31, 2019
Subsequent Event [Line Items]
Stock Repurchased During Period, Shares		0.6	0.4
Stock Repurchased During Period, Value		$ 150.0	$ 100.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Repurchased During Period, Shares	0.5
Stock Repurchased During Period, Value	$ 150.0