Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Available-for-sale Debt Securities, Amortized Cost Basis		$ 56,275	$ 55,362
Available-for-sale Equity Securities, Amortized Cost Basis	[1]		676
Available-for-sale Securities, Equity Securities		813	1,047
Variable Interest Entity, Consolidated, Carrying Amount, Assets		205	246
Other liabilities, variable interest entity liabilities	[2]	$ 5	$ 6
Common stock, par value		$ 0.01	$ 0.01
Common stock, shares authorized		1,500,000,000	1,500,000,000
Common stock, shares issued		490,923,222	490,923,222
Treasury stock, shares		79,609,209	66,507,690
Commercial Loan [Member]
Valuation Allowance		$ (20)	$ (18)
Fixed Maturities [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		191	218
Equity Securities [Member]
Available-for-sale Equity Securities, Amortized Cost Basis		0	351
Available-for-sale Securities, Equity Securities		0	348
Short-term Investments [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		4	16
Cash [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		7	9
Variable Interest Entity, Primary Beneficiary [Member]
Available-for-sale Equity Securities, Amortized Cost Basis		1	0
Equity Securities [Member]
Available-for-sale Equity Securities, Amortized Cost Basis		826	1,027
Limited Partnerships and Other Alternative Investments [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		2	3
Other liabilities, variable interest entity liabilities	[2]	$ 0	$ 1

[1] Excludes equity securities, FVO, with a cost and fair value of $351 and $348, respectively, as of December 31, 2014. The Company did not hold any equity securities, FVO as of September 30, 2015.

[2] Included in other liabilities in the Company’s Condensed Consolidated Balance Sheets.