Income Taxes Deferred Income Tax (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax assets
Future policyholder benefits	$ 270.0	$ 276.7
Unearned premiums / deferred revenues	0	0
Investments	0	0
Net operating and capital loss carryover benefits	0	1.7
Other	0.8	0.2
Available-for-sale debt securities	28.0	16.2
Alternative minimum tax credits	2.1	1.8
Subtotal	300.9	296.6
Valuation allowance	(74.2)	(105.4)
Total deferred income tax assets, net of valuation allowance	226.7	191.2
Deferred income tax liabilities
Deferred policy acquisition costs	(101.7)	(92.2)
Investments	(78.7)	(77.8)
Other	(18.3)	(5.0)
Gross deferred income tax liabilities	(198.7)	(175.0)
Net deferred income tax assets	$ 28.0	$ 16.2