Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
The Company has recognized compensation expense associated with its stock-based employee compensation programs as follows:
Total stock-based compensation expense	$ 21.7	$ 4.4	$ 33.2	$ 10.3
Selling, General and Administrative Expenses [Member]
The Company has recognized compensation expense associated with its stock-based employee compensation programs as follows:
Total stock-based compensation expense	17.6	2.6	19.0	4.7
Corporate Expenses [Member]
The Company has recognized compensation expense associated with its stock-based employee compensation programs as follows:
Total stock-based compensation expense	$ 4.1	$ 1.8	$ 14.2	$ 5.6