Condensed Consolidated Statements of Changes in Shareholder's Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Deficit)
Beginning Balance at Dec. 31, 2010	$ 3,092.0	$ 2.8	$ 4,326.0	$ 390.5	$ (1,627.3)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	320.3				320.3
Comprehensive income:
Other comprehensive income (loss), after tax	357.0			357.0
Total comprehensive income (loss)	677.3
Dividends paid and distribution of capital	0		0
Contribution of capital	201.0		201.0
Employee related benefits	6.0		6.0
Ending Balance at Dec. 31, 2011	3,976.3	2.8	4,533.0	747.5	(1,307.0)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	325.4				325.4
Comprehensive income:
Other comprehensive income (loss), after tax	275.5			275.5
Total comprehensive income (loss)	600.9
Dividends paid and distribution of capital	(340.0)		(340.0)
Contribution of capital	0		0
Employee related benefits	24.2		24.2
Ending Balance at Dec. 31, 2012	4,261.4	2.8	4,217.2	1,023.0	(981.6)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	283.5				283.5
Comprehensive income:
Other comprehensive income (loss), after tax	(527.6)			(527.6)
Total comprehensive income (loss)	(244.1)
Dividends paid and distribution of capital	(264.0)		(264.0)
Contribution of capital	0		0
Employee related benefits	0.1		0.1
Ending Balance at Dec. 31, 2013	$ 3,753.4	$ 2.8	$ 3,953.3	$ 495.4	$ (698.1)