Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost of $19,012.7 at 2014 and $19,096.7 at 2013)	$ 20,311.3	$ 19,944.4
Fixed maturities, at fair value using the fair value option	686.8	621.3
Equity securities, available-for-sale, at fair value (cost of $111.1 at 2014 and $119.4 at 2013)	127.0	134.9
Short-term investments	110.0	15.0
Mortgage loans on real estate, net of valuation allowance of $1.2 at 2014 and at 2013	3,377.0	3,396.1
Policy loans	240.7	242.0
Limited partnerships/corporations	172.4	180.9
Derivatives	412.9	464.4
Securities pledged (amortized cost of $204.6 at 2014 and $137.9 at 2013)	211.8	140.1
Total investments	25,649.9	25,139.1
Cash and cash equivalents	465.4	378.9
Short-term investments under securities loan agreement, including collateral delivered	186.6	135.8
Accrued investment income	298.9	285.0
Receivable for securities sold	2.6	5.5
Reinsurance recoverable	2,002.8	2,016.6
Deferred policy acquisition costs, Value of business acquired, and Sale inducements to contract owners	1,053.9	1,189.7
Notes receivable from affiliate	175.0	175.0
Short-term loan to affiliate	72.0	0
Due from affiliates	70.8	62.9
Property and equipment	77.5	78.4
Other assets	186.4	108.5
Assets held in separate accounts	61,857.7	60,104.9
Total assets	92,099.5	89,680.3
Liabilities and Shareholder's Equity
Future policy benefits and contract owner balances	24,640.7	24,589.6
Payable for securities purchased	20.2	13.7
Payables under securities loan agreement, including collateral held	384.7	264.4
Long-term debt	4.9	4.9
Due to affiliates	111.9	121.6
Derivatives	179.0	216.6
Current income tax payable to Parent	33.7	74.1
Deferred income taxes	284.6	190.1
Other liabilities	573.5	347.0
Liabilities related to separate accounts	61,857.7	60,104.9
Total liabilities	88,090.9	85,926.9
Shareholder's equity:
Common stock (100,000 shares authorized, 55,000 issued and outstanding; $50 per share value)	2.8	2.8
Additional paid-in capital	3,953.3	3,953.3
Accumulated other comprehensive income	704.9	495.4
Retained earnings (deficit)	(652.4)	(698.1)
Total shareholder's equity	4,008.6	3,753.4
Total liabilities and shareholder's equity	$ 92,099.5	$ 89,680.3