Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013	Sep. 30, 2012
Schedule of stock -based compensation expense in operations
Compensation expense	$ 5.3	[1]	$ 2.7	[1]	$ 20.5	$ 10.5

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