Fair Value Measurements (Details 9) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Assets not carried at fair value [Abstract]
Policy loans	$ 1,429	$ 1,420
Carrying Value	5,707	5,598
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Line of Credit Facility, Amount Outstanding		238
Level 2 [Member]
Liabilities not carried at fair value [Abstract]
Senior notes	5,007	5,206
Junior subordinated debentures	1,100	1,100
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Line of Credit Facility, Amount Outstanding	243	238
Level 3 [Member]
Assets not carried at fair value [Abstract]
Policy loans	1,429	1,420
Carrying Value	5,707	5,598
Liabilities not carried at fair value [Abstract]
Other policyholder funds and benefits payable	8,968	9,152
Consumer notes	78	82
Policy loans [Member] | Level 3 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans Receivable, Fair Value Disclosure	1,478	1,480
Mortgage Loans [Member] | Level 3 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Loans Receivable, Fair Value Disclosure	5,786	5,641
Other policyholder funds and benefits payable [Member] | Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Notes Payable, Fair Value Disclosure	9,218	9,352
Senior Notes [Member] | Level 2 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Notes Payable, Fair Value Disclosure	5,770	5,845
Junior Subordinated Debentures [Member] | Level 2 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Notes Payable, Fair Value Disclosure	1,298	1,271
Line of credit facility, amount outstanding, at fair value	243	238
Consumer Notes [Member] | Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Notes Payable, Fair Value Disclosure	$ 76	$ 82