Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Compensation expense	$ 23.3	[1]	$ 29.3	[1]	$ 15.2	[1]

[1] Stock-Based compensation expense was recorded in our Corporate and other business segment.