Recent Accounting Pronouncements (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issuance costs	$ 2.0
Long-term debt		$ 2,033.0
New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 201503 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term debt		(21.4)	$ (24.4)
Other assets		$ (21.4)	$ (24.4)