Restatement and Amendment of Previously Reported Financial Information Summary of Correction of Errors, Equity (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended													3 Months Ended							3 Months Ended							3 Months Ended							3 Months Ended							3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	Mar. 31, 2012 ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):		Mar. 31, 2013 RETAINED EARNINGS (ACCUMULATED DEFICIT):	Mar. 31, 2012 RETAINED EARNINGS (ACCUMULATED DEFICIT):		Mar. 31, 2012 Corrections of Errors	Mar. 31, 2012 Corrections of Errors COMMON STOCK:	Dec. 31, 2011 Corrections of Errors COMMON STOCK:	Mar. 31, 2012 Corrections of Errors ADDITIONAL PAID-IN CAPITAL:	Dec. 31, 2011 Corrections of Errors ADDITIONAL PAID-IN CAPITAL:	Mar. 31, 2012 Corrections of Errors ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	Mar. 31, 2012 Corrections of Errors RETAINED EARNINGS (ACCUMULATED DEFICIT):	Mar. 31, 2012 As previously reported	Mar. 31, 2012 As previously reported COMMON STOCK:	Dec. 31, 2011 As previously reported COMMON STOCK:	Mar. 31, 2012 As previously reported ADDITIONAL PAID-IN CAPITAL:	Dec. 31, 2011 As previously reported ADDITIONAL PAID-IN CAPITAL:	Mar. 31, 2012 As previously reported ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	Mar. 31, 2012 As previously reported RETAINED EARNINGS (ACCUMULATED DEFICIT):	Mar. 31, 2012 Adjusted prior to the retrospective adoption	Mar. 31, 2012 Adjusted prior to the retrospective adoption COMMON STOCK:	Dec. 31, 2011 Adjusted prior to the retrospective adoption COMMON STOCK:	Mar. 31, 2012 Adjusted prior to the retrospective adoption ADDITIONAL PAID-IN CAPITAL:	Dec. 31, 2011 Adjusted prior to the retrospective adoption ADDITIONAL PAID-IN CAPITAL:	Mar. 31, 2012 Adjusted prior to the retrospective adoption ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	Mar. 31, 2012 Adjusted prior to the retrospective adoption RETAINED EARNINGS (ACCUMULATED DEFICIT):	Mar. 31, 2012 Scenario, Retrospective Adoption	Mar. 31, 2012 Scenario, Retrospective Adoption COMMON STOCK:	Dec. 31, 2011 Scenario, Retrospective Adoption COMMON STOCK:	Mar. 31, 2012 Scenario, Retrospective Adoption ADDITIONAL PAID-IN CAPITAL:	Dec. 31, 2011 Scenario, Retrospective Adoption ADDITIONAL PAID-IN CAPITAL:	Mar. 31, 2012 Scenario, Retrospective Adoption ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	Mar. 31, 2012 Scenario, Retrospective Adoption RETAINED EARNINGS (ACCUMULATED DEFICIT):	Mar. 31, 2012 As restated and amended	Mar. 31, 2012 As restated and amended COMMON STOCK:	Dec. 31, 2011 As restated and amended COMMON STOCK:	Mar. 31, 2012 As restated and amended ADDITIONAL PAID-IN CAPITAL:	Dec. 31, 2011 As restated and amended ADDITIONAL PAID-IN CAPITAL:	Mar. 31, 2012 As restated and amended ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS):	Mar. 31, 2012 As restated and amended RETAINED EARNINGS (ACCUMULATED DEFICIT):
Balance, beginning of period									$ (185.7)	$ 0	$ 0	$ 0	$ 0	$ 0.2	$ (185.9)	$ 645.8	$ 2.5	$ 2.5	$ 802.2	$ 802.2	$ 6.2	$ (165.1)	$ 460.1	$ 2.5	$ 2.5	$ 802.2	$ 802.2	$ 6.4	$ (351.0)	$ (36.1)	$ 0	$ 0	$ 0	$ 0	$ (3.8)	$ (32.3)	$ 424.0	$ 2.5	$ 2.5	$ 802.2	$ 802.2	$ 2.6	$ (383.3)
Other comprehensive income (loss)	(16.0)	4.9	(16.0)	4.9	[1]				(2.7)					(2.7)		7.6					7.6							4.9							0		4.9					4.9
Net income (loss)	(20.4)	(22.5)				(20.4)	(22.5)	[1]	(25.4)						(25.4)	2.9						2.9							(22.5)							0	(22.5)						(22.5)
Stockholders' Equity, Period Increase (Decrease)									(28.1)							10.5							(17.6)							0							(17.6)
Balance, beginning of period									$ (213.8)	$ 0	$ 0	$ 0	$ 0	$ (2.5)	$ (211.3)	$ 656.3	$ 2.5	$ 2.5	$ 802.2	$ 802.2	$ 13.8	$ (162.2)	$ 442.5	$ 2.5	$ 2.5	$ 802.2	$ 802.2	$ 11.3	$ (373.5)	$ (36.1)	$ 0	$ 0	$ 0	$ 0	$ (3.8)	$ (32.3)	$ 406.4	$ 2.5	$ 2.5	$ 802.2	$ 802.2	$ 7.5	$ (405.8)

[1] Amounts reflect the cumulative impact of the retrospective adoption of amended guidance to ASC 944, Financial Services Insurance (ASU 2010-26), as detailed more fully within Note 2 to these financial statements.