Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Fixed maturities, at fair value (amortized cost, $17,466; $17,278)	$ 18,747	$ 18,983
Equity securities, at fair value (cost, $192; $199)	184	189
Commercial Mortgage Loans	2,015	2,081
Policy loans	1,431	1,438
Other long-term investments	1,428	1,488
Short-term investments	94	163
Total investments	23,899	24,342
Cash and cash equivalents	2,381	1,420
Premiums, accounts and notes receivable, net	3,804	2,757
Reinsurance recoverables	6,846	7,080
Deferred policy acquisition costs	1,548	1,502
Property and equipment	1,483	1,502
Deferred tax assets, net	327	293
Goodwill	6,040	5,989
Other assets, including other intangibles	2,673	2,683
Separate account assets	7,908	8,328
Total assets	56,909	55,896
Liabilities:
Contractholder deposit funds	8,418	8,430
Future policy benefits	9,482	9,642
Unpaid claims and claim expenses	4,538	4,400
Global Health Care medical costs	2,459	2,180
Unearned premiums	591	621
Total insurance and contractholder liabilities	25,488	25,273
Accounts payable, accrued expenses and other liabilities	6,454	6,264
Short-term debt	149	147
Long-term debt	5,056	5,005
Separate account liabilities	7,908	8,328
Total liabilities	$ 45,055	$ 45,017
Contingencies - Note 17
Redeemable noncontrolling interests	$ 67	$ 90
Shareholders' Equity
Common stock (par value per share, $0.25; shares issued, 296; authorized, 600)	74	74
Additional paid-in capital	2,845	2,769
Accumulated other comprehensive loss	(1,215)	(936)
Retained earnings	11,706	10,289
Less treasury stock, at cost	(1,636)	(1,422)
Total shareholders' equity	11,774	10,774
Noncontrolling interest	13	15
Total equity	11,787	10,789
Total liabilities and equity	$ 56,909	$ 55,896
Shareholders' Equity Per Share	$ 45.71	$ 41.55