Interim Unaudited Statements of Changes in Stockholder's Equity (USD $) In Millions, unless otherwise specified	Total	COMMON STOCK:	ADDITIONAL PAID-IN CAPITAL:	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	ACCUMULATED DEFICIT:
Balance, beginning of period at Dec. 31, 2012	$ 295.1	$ 2.5	$ 802.2	$ 11.4	$ (521.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(16.0)			(16.0)
Net income (loss)	(20.4)				(20.4)
Change in stockholder’s equity	(36.4)
Balance, end of period at Mar. 31, 2013	258.7	2.5	802.2	(4.6)	(541.4)
Balance, beginning of period at Dec. 31, 2013	372.5	2.5	847.2	(11.9)	(465.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(2.9)			(2.9)
Net income (loss)	(16.8)				(16.8)
Change in stockholder’s equity	(19.7)
Balance, end of period at Mar. 31, 2014	$ 352.8	$ 2.5	$ 847.2	$ (14.8)	$ (482.1)