Organization and Basis of Presentation, Fair Value (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Carrying value of debt	Dec. 31, 2012 Carrying value of debt	Jun. 30, 2013 Fair value of debt	Dec. 31, 2012 Fair value of debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Percent of trade payables outstanding	0.00%
Percent of trade receivables outstanding	0.00%
Total debt		$ 902.9	$ 354.0	$ 900.8	$ 368.7