Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost of $19,018.1 at 2013 and $18,458.7 at 2012)	$ 19,934.0	$ 20,690.8
Fixed maturities, at fair value using the fair value option	604.7	544.7
Equity securities, available-for-sale, at fair value (cost of $111.2 at 2013 and $129.3 at 2012)	127.3	142.8
Short-term investments	232.5	679.8
Mortgage loans on real estate, net of valuation allowance of $1.4 at 2013 and $1.3 at 2012	3,282.8	2,872.7
Policy loans	242.1	240.9
Limited partnerships/corporations	184.5	179.6
Derivatives	410.7	512.7
Securities pledged (amortized cost of $178.0 at 2013 and $207.2 at 2012)	180.4	219.7
Total investments	25,199.0	26,083.7
Cash and cash equivalents	399.2	363.4
Short-term investments under securities loan agreement, including collateral delivered	173.0	186.1
Accrued investment income	292.3	273.0
Receivable for securities sold	8.0	3.9
Reinsurance recoverable	2,041.3	2,153.7
Deferred policy acquisition costs, Value of business acquired, and Sale inducements to contract owners	1,168.8	695.0
Notes receivable from affiliate	175.0	175.0
Current income taxes recoverable	3.1	0
Due from affiliates	77.8	99.8
Property and equipment	79.3	81.8
Other assets	107.5	101.1
Assets held in separate accounts	58,504.9	53,655.3
Total assets	88,229.2	83,871.8
Liabilities and Shareholder's Equity
Future policy benefits and contract owner balances	24,556.9	24,191.2
Payable for securities purchased	58.2	0
Payables under securities loan agreement, including collateral held	307.8	353.2
Long-term debt	4.9	4.9
Due to affiliates	105.1	95.1
Derivatives	200.4	346.8
Current income tax payable to Parent	0	32.1
Deferred income taxes	261.9	507.1
Other liabilities	455.9	424.7
Liabilities related to separate accounts	58,504.9	53,655.3
Total liabilities	84,456.0	79,610.4
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	4,043.3	4,217.2
Accumulated other comprehensive income	489.1	1,023.0
Retained earnings (deficit)	(762.0)	(981.6)
Total shareholder's equity	3,773.2	4,261.4
Total liabilities and shareholder's equity	$ 88,229.2	$ 83,871.8