Business Dispositions Invested Assets Transferred (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2011	Mar. 31, 2014 Asset-backed Securities [Member]	Dec. 31, 2013 Asset-backed Securities [Member]	Mar. 31, 2014 Collateralized Debt Obligations [Member]	Dec. 31, 2013 Collateralized Debt Obligations [Member]	Mar. 31, 2014 Commercial Mortgage Backed Securities [Member]	Dec. 31, 2013 Commercial Mortgage Backed Securities [Member]	Mar. 31, 2014 Corporate Debt Securities [Member]	Dec. 31, 2013 Corporate Debt Securities [Member]	Mar. 31, 2014 Foreign Government Debt Securities [Member]	Dec. 31, 2013 Foreign Government Debt Securities [Member]	Mar. 31, 2014 US States and Political Subdivisions Debt Securities [Member]	Dec. 31, 2013 US States and Political Subdivisions Debt Securities [Member]	Mar. 31, 2014 Residential Mortgage Backed Securities [Member]	Dec. 31, 2013 Residential Mortgage Backed Securities [Member]	Mar. 31, 2014 US Treasury Securities [Member]	Dec. 31, 2013 US Treasury Securities [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Retirement Plans and Individual Life Businesses [Member]	Jan. 02, 2013 Retirement Plans and Individual Life Businesses [Member]	Mar. 31, 2014 Retirement Plans and Individual Life Businesses [Member] Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2014 Retirement Plans and Individual Life Businesses [Member] Fair Value, Inputs, Level 3 [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed Maturities Available-for-sale at Amortized Cost	$ 60,455	$ 60,641																					$ 13,916
Available-for-sale Securities, Fair Value	64,118	63,225			2,252	2,365	2,394	2,387	4,568	4,446	29,040	28,490	4,050	4,104	12,682	12,173	4,556	4,647	3,797	3,745				15,349	14,700	0
Equity securities, AFS	779	868																						37
Total fixed maturities, AFS, fair value	63,339	62,357																						16
Carrying Value	5,707	5,598																			5,707	5,598		1,364
Policy loans	1,429	1,420																			1,429	1,420		582
Disposal Group, Assets of Business Transferred under Contractual Arrangement																								17,348
Equity Securities Available for Sale at Cost	745	850																					35
Allowance for Loan and Lease Losses, Real Estate	$ 17	$ 67	$ 68	$ 68																			$ 1