Income Tax Matters, Income Before Income Taxes and Tax Provision Table (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income before income taxes by geographic area
Domestic	$ 138.9	$ 134.5	$ 37.9
Foreign	4.3	5.1	3.4
Income before income taxes	143.2	139.6	41.3
Federal income tax (expense) benefit
Current federal tax (expense) benefit	1.1	0	1.4
Deferred federal income tax (expense) benefit	(49.7)	(113.0)	(2.3)
Federal benefit (expense) applied to increase (decrease) Additional capital/Other comprehensive income	1.3	67.4	(13.5)
Federal income tax (expense) benefit	(47.3)	(45.6)	(14.4)
Foreign income tax (expense) benefit
Current foreign tax (expense) benefit	16.2	(2.3)	0.3
Deferred foreign income tax (expense) benefit	(0.5)	(0.2)	(0.5)
Foreign benefit (expense) applied to increase (decrease) Additional capital/Other comprehensive income	(0.1)	0.2	(0.4)
Foreign income tax (expense) benefit	15.6	(2.3)	(0.6)
State income tax (expense) benefit
Current state tax (expense) benefit	(0.2)	0.2	0.1
Deferred state income tax (expense) benefit	(6.7)	(15.3)	0.7
State benefit (expense) applied to increase (decrease) Additioanl capital/Other comprehensive income	0.2	9.2	(2.0)
State income tax (expense) benefit	(6.7)	(5.9)	(1.2)
Total income tax (expense) benefit
Current income tax (expense) benefit	(17.1)	2.1	(1.8)
Deferred income tax (expense) benefit	56.9	128.5	2.1
Benefit (expense) applied to increase (decrease) Additional capital/Other comprehensive income	(1.4)	(76.8)	15.9
Income tax provision	$ (38.4)	$ (53.8)	$ (16.2)