Income Taxes - Schedule of Current and Deferred Income Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current Income Tax Assets	$ 2.0	$ 5.4
Deferred Income Tax Assets	59.6	6.6
Valuation Allowance for State Income Taxes	0	(6.6)
Current and Deferred Income Tax Assets	$ 61.6	$ 5.4