Consolidated Balance Sheets (USD $)	Dec. 31, 2012		Dec. 31, 2011
Investments [Abstract]
Fixed maturities, at fair value (amortized cost, $15,481; $14,257)	$ 17,705,000,000	[1]	$ 16,217,000,000	[2]
Equity securities, at fair value (cost, $121; $124)	111,000,000		100,000,000
Commercial Mortgage Loans	2,851,000,000		3,301,000,000
Policy loans	1,501,000,000		1,502,000,000
Real estate	83,000,000		87,000,000
Other long-term investments	1,255,000,000		1,058,000,000
Short-term investments	154,000,000		225,000,000
Total investments	23,660,000,000		22,490,000,000
Cash and cash equivalents	2,978,000,000		4,690,000,000
Accrued investment income	258,000,000		252,000,000
Premiums, accounts and notes receivable, net	1,777,000,000		1,358,000,000
Reinsurance recoverables	6,256,000,000		6,256,000,000
Deferred policy acquisition costs	1,198,000,000		817,000,000
Property and equipment	1,120,000,000		1,024,000,000
Deferred income taxes, net	374,000,000		803,000,000
Goodwill	6,001,000,000		3,164,000,000
Other assets, including other intangibles	2,355,000,000		1,750,000,000
Separate account assets	7,757,000,000		8,093,000,000
Total assets	53,734,000,000		50,697,000,000
Liabilities
Contractholder deposit funds	8,508,000,000		8,553,000,000
Future policy benefits	9,265,000,000		8,593,000,000
Unpaid claims and claim expenses	4,062,000,000		3,936,000,000
Health Care medical claims payable	1,856,000,000		1,305,000,000
Unearned premiums and fees	549,000,000		502,000,000
Total insurance and contractholder liabilities	24,240,000,000		22,889,000,000
Accounts payable, accrued expenses and other liabilities	6,667,000,000		6,627,000,000
Short-term debt	201,000,000		104,000,000
Long-term debt	4,986,000,000		4,990,000,000
Separate account liabilities	7,757,000,000		8,093,000,000
Total liabilities	43,851,000,000		42,703,000,000
Contingencies - Note 24	0		0
Redeemable noncontrolling interest	114,000,000		0
Shareholders' Equity
Common stock (par value per share, $0.25; shares issued,366; authorized, 600)	92,000,000		92,000,000
Additional paid-in capital	3,295,000,000		3,188,000,000
Net unrealized appreciation, fixed maturities	883,000,000		739,000,000
Net unrealized appreciation, equity securities	4,000,000		1,000,000
Net unrealized depreciation, derivatives	(28,000,000)		(23,000,000)
Net translation of foreign currencies	69,000,000		3,000,000
Postretirement benefits liability adjustment	(1,599,000,000)		(1,507,000,000)
Accumulated other comprehensive loss	(671,000,000)		(787,000,000)
Retained earnings	12,330,000,000		10,787,000,000
Less treasury stock, at cost	(5,277,000,000)		(5,286,000,000)
Total shareholders' equity	9,769,000,000		7,994,000,000
Total liabilities and equity	53,734,000,000		50,697,000,000
Shareholders' Equity Per Share	$ 34.18		$ 28.00

[1] Fixed maturities included $875 million of net appreciation required to adjust future policy benefits for the run-off settlement annuity business including $108 million of appreciation for securities classified in Level 3.

[2] Fixed maturities included $826 million of net appreciation required to adjust future policy benefits for the run-off settlement annuity business including $115 million of appreciation for securities classified in Level 3.