Investments In and Advances to Nonconsolidated Affiliates - Table 1 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Net operating revenues	$ 8.2	$ 21.3
Operating expenses	(3.9)	(11.2)
Income from continuing operations, net of tax	3.9	18.5
Net income	$ 3.9	$ 18.5