Schedule for Carrying Amounts and Fair Values of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Level 3 | Policy loans
Carrying Amounts and Fair Values of Financial Instruments:
Carrying Value	$ 66.1	$ 61.0
Fair Value	65.6	60.6
Level 3 | Investment contracts
Carrying Amounts and Fair Values of Financial Instruments:
Carrying Value	2,762.8	2,349.8
Fair Value	2,763.8	2,355.4
Level 3 | Surplus Note
Carrying Amounts and Fair Values of Financial Instruments:
Carrying Value	30.0	0
Fair Value	30.0	0
Level 1 | Cash and cash equivalent
Carrying Amounts and Fair Values of Financial Instruments:
Carrying Value	181.0	83.1
Fair Value	$ 181.0	$ 83.1