Other Income, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Other Income and Expenses [Abstract]
Interest income	$ 1.0		$ 0.4		$ 0.4
Unrealized gains on financial derivatives	3.6	[1]	3.2	[1]	0.8	[1]
Realized gains on investments	1.0		1.4		0.5
Distribution from third party trust	0		0.6	[2]	0
Insurance settlement	0		0		0.4
All other, net	1.1		0		0.7
Other income, net	$ 6.7		$ 5.6		$ 2.8

[1] See “Derivative Financial Instruments” in Note 1 for a discussion of accounting policy for such instruments.

[2] See Note 12 for discussion of the distribution.