Share Repurchase Program (Details) - USD ($)	1 Months Ended	6 Months Ended
	Oct. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Authorized amount	$ 500,000,000
Stock repurchase program term	2 years
Shares purchased (in shares)		2,730,183.000000
Purchase of treasury stock		$ 96,300,000	$ 10,000,000
Remaining authorized amount for future purchases		$ 279,200,000