Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost of $18,791.1 at 2013 and $18,458.7 at 2012)	$ 19,798.8	$ 20,690.8
Fixed maturities, at fair value using the fair value option	514.2	544.7
Equity securities, available-for-sale, at fair value (cost of $110.2 at 2013 and $129.3 at 2012)	126.7	142.8
Short-term investments	310.5	679.8
Mortgage loans on real estate, net of valuation allowance of $1.5 at 2013 and $1.3 at 2012	3,187.9	2,872.7
Policy loans	239.8	240.9
Limited partnerships/corporations	181.3	179.6
Derivatives	430.5	512.7
Securities pledged (amortized cost of $214.3 at 2013 and $207.2 at 2012)	217.4	219.7
Total investments	25,007.1	26,083.7
Cash and cash equivalents	284.5	363.4
Short-term investments under securities loan agreement, including collateral delivered	162.7	186.1
Accrued investment income	286.5	273.0
Receivable for securities sold	17.5	3.9
Reinsurance recoverable	2,098.8	2,153.7
Deferred policy acquisition costs, Value of business acquired, and Sale inducements to contract owners	1,100.4	695.0
Notes receivable from affiliate	175.0	175.0
Due from affiliates	56.8	99.8
Property and equipment	80.2	81.8
Other assets	104.2	101.1
Assets held in separate accounts	58,022.3	53,655.3
Total assets	87,396.0	83,871.8
Liabilities and Shareholder's Equity
Future policy benefits and contract owner balances	24,324.2	24,191.2
Payable for securities purchased	58.4	0
Payables under securities loan agreement, including collateral held	268.4	353.2
Long-term debt	4.9	4.9
Due to affiliates	100.7	95.1
Derivatives	306.3	346.8
Current income tax payable to Parent	7.0	32.1
Deferred income taxes	252.6	507.1
Other liabilities	339.7	424.7
Liabilities related to separate accounts	58,022.3	53,655.3
Total liabilities	83,684.5	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	495.0	1,023.0
Retained earnings (deficit)	(829.6)	(981.6)
Total shareholder's equity	3,711.5	4,261.4
Total liabilities and shareholder's equity	$ 87,396.0	$ 83,871.8