Condensed Consolidated Statements of Changes in Shareholder's Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Deficit)
Beginning Balance at Dec. 31, 2013	$ 3,753.4	$ 2.8	$ 3,953.3	$ 495.4	$ (698.1)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	120.3	0.0	0.0	0.0	120.3
Comprehensive income:
Other comprehensive income (loss), after tax	376.2	0.0	0.0	376.2	0.0
Total comprehensive income (loss)	496.5
Employee related benefits	1.5	0.0	1.5	0.0	0.0
Ending Balance at Jun. 30, 2014	3,970.4	2.8	3,673.8	871.6	(577.8)
Comprehensive income:
Adjustments to Additional Paid in Capital, Contributions from (Distributions to) Affiliate	(281.0)	0.0	(281.0)	0.0	0.0
Beginning Balance at Dec. 31, 2014	3,961.8	2.8	3,583.9	841.5	(466.4)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	136.0	0.0	0.0	0.0	136.0
Comprehensive income:
Other comprehensive income (loss), after tax	(244.8)	0.0	0.0	(244.8)	0.0
Total comprehensive income (loss)	(108.8)
Employee related benefits	9.5	0.0	9.5	0.0	0.0
Ending Balance at Jun. 30, 2015	3,631.5	2.8	3,362.4	596.7	(330.4)
Comprehensive income:
Adjustments to Additional Paid in Capital, Contributions from (Distributions to) Affiliate	$ (231.0)	$ 0.0	$ (231.0)	$ 0.0	$ 0.0