Investments In and Advances to Nonconsolidated Affiliates - Table 1 (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
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Net operating revenues	$ 16.2	$ 18.6	$ 55.4	$ 64.2
Operating expenses	(10.3)	(9.6)	(32.5)	(37.5)
Income from continuing operations, net of tax	4.4	7.1	18.4	21.5
Net income	$ 4.4	$ 7.1	$ 18.4	$ 21.5