Fair Value Measurements (Details 9) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Assets not carried at fair value [Abstract]
Policy loans	$ 1,410		$ 1,951
Mortgage loans, carrying value	3,552		4,935
Level 3 [Member]
Assets not carried at fair value [Abstract]
Policy loans	1,410		1,951
Mortgage loans, carrying value			4,935
Liabilities not carried at fair value [Abstract]
Other policyholder funds and benefits payable	9,224	[1]	9,318	[1]
Consumer notes	81	[2]	159	[2]
Policy Loans [Member] | Level 3 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans Receivable, Fair Value Disclosure	1,478		2,112
Mortgage Loans [Member] | Level 3 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans Receivable, Fair Value Disclosure	3,591		5,109
Other policyholder funds and benefits payable [Member] | Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Notes Payable, Fair Value Disclosure	9,433	[1]	9,668	[1]
Consumer Notes [Member] | Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Notes Payable, Fair Value Disclosure	$ 82	[2]	$ 159	[2]

[1] Excludes group accident and health and universal life insurance contracts, including corporate owned life insurance.

[2] Excludes amounts carried at fair value and included in disclosures above.