Subsequent Events (Details) - USD ($) shares in Millions, $ in Millions					1 Months Ended
	Feb. 09, 2017	Oct. 19, 2016	Aug. 01, 2016	Feb. 10, 2016	Jul. 18, 2016
Subsequent Event [Line Items]
Accelerated share repurchases, initial price to be paid			$ 100.0	$ 200.0
Accelerated share repurchases, shares		0.2	0.5	1.3	0.2
Accelerated share repurchases, percentages of shares to be repurchased			75.00%	75.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Accelerated share repurchases, initial price to be paid	$ 75.0
Accelerated share repurchases, shares	0.4
Accelerated share repurchases, percentages of shares to be repurchased	85.00%