Fair Value (Unobservable Input Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Liability Related To Securitized Reverse Residential Mortgage Loans [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,		$ (1,175)	$ 0
Other Comprehensive Income (Loss)		0	0
Purchases		0	0
Sales		1,149	0
Issuances		0	(1,175)
Settlements		23	0
Transfers into Level 3		0	0
Transfers out of Level 3		2	0
Balance at December 31,		0	(1,175)
Liability Related To Securitized Reverse Residential Mortgage Loans [Member] | Other Revenues [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		1	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Liability Related To Securitized Reverse Residential Mortgage Loans [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Liability Related To Securitized Reverse Residential Mortgage Loans [Member] | Net Investment Income [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Liability Related To Securitized Reverse Residential Mortgage Loans [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Liability Related To Securitized Reverse Residential Mortgage Loans [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Liability Related To Securitized Reverse Residential Mortgage Loans [Member] | Other Expenses [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
FVO general account securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	32	23	77
Other Comprehensive Income (Loss)	0	0	0
Purchases	0	0	0
Sales	(30)	(9)	(33)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	15	0	0
Transfers out of Level 3	0	0	(14)
Balance at December 31,	29	32	23
FVO general account securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO general account securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO general account securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	6	18	(7)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	5	14	(8)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	5	14	(8)
FVO general account securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	6	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO general account securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO general account securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO contractholder-directed unit-linked investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	937	1,386	735
Other Comprehensive Income (Loss)	0	0	0
Purchases	340	604	1,246
Sales	(608)	(1,040)	(478)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	235	0	121
Transfers out of Level 3	(293)	(38)	(243)
Balance at December 31,	603	937	1,386
FVO contractholder-directed unit-linked investments [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO contractholder-directed unit-linked investments [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO contractholder-directed unit-linked investments [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(8)	25	5
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(1)	25	(4)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(1)	25	(4)
FVO contractholder-directed unit-linked investments [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO contractholder-directed unit-linked investments [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
FVO contractholder-directed unit-linked investments [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Residential Mortgage Loans - FVO [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	0	0	0
Other Comprehensive Income (Loss)	0	0	0
Purchases	339	0	0
Sales	(2)	0	0
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance at December 31,	338	0	0
Residential Mortgage Loans - FVO [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Residential Mortgage Loans - FVO [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Residential Mortgage Loans - FVO [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	1	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	0	0
Residential Mortgage Loans - FVO [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Residential Mortgage Loans - FVO [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Residential Mortgage Loans - FVO [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Mortgage Loans Held-for-sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	49	1,414	24
Other Comprehensive Income (Loss)	0	0	0
Purchases	0	1	3
Sales	(45)	(1,348)	0
Issuances	0	7	1,361
Settlements	(4)	(43)	(87)
Transfers into Level 3	0	56	109
Transfers out of Level 3	0	(3)	(1)
Balance at December 31,	0	49	1,414
Mortgage Loans Held-for-sale [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	(35)	5
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	(29)	5
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	(29)	5
Mortgage Loans Held-for-sale [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Mortgage Loans Held-for-sale [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Mortgage Loans Held-for-sale [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Mortgage Loans Held-for-sale [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Mortgage Loans Held-for-sale [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Long-term Debt [Member] | Consolidated Securitization Entities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	(44)	(116)	(184)
Other Comprehensive Income (Loss)	0	0	0
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	18	79	76
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance at December 31,	(28)	(44)	(116)
Long-term Debt [Member] | Consolidated Securitization Entities [Member] | Other Revenues [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Long-term Debt [Member] | Consolidated Securitization Entities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Long-term Debt [Member] | Consolidated Securitization Entities [Member] | Net Investment Income [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Long-term Debt [Member] | Consolidated Securitization Entities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(2)	(7)	(8)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	(7)	(8)
Long-term Debt [Member] | Consolidated Securitization Entities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Long-term Debt [Member] | Consolidated Securitization Entities [Member] | Other Expenses [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Interest rate contracts [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	177	300	(86)
Other Comprehensive Income (Loss)	(102)	0	329
Purchases	0	0	(1)
Sales	0	0	0
Issuances	0	0	0
Settlements	(31)	(71)	(44)
Transfers into Level 3	0	0	(1)
Transfers out of Level 3	(15)	0	0
Balance at December 31,	13	177	300
Interest rate contracts [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	68
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	(67)	62
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	68
Interest rate contracts [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Interest rate contracts [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Interest rate contracts [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Interest rate contracts [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(8)	0	24
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(16)	15	41
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(8)	0	24
Interest rate contracts [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign currency exchange rate contracts [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	37	44	73
Other Comprehensive Income (Loss)	(1)	0	0
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	2	(17)	(1)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance at December 31,	(11)	37	44
Foreign currency exchange rate contracts [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign currency exchange rate contracts [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign currency exchange rate contracts [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign currency exchange rate contracts [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign currency exchange rate contracts [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(46)	(12)	(24)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(49)	10	(28)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(46)	(12)	(24)
Foreign currency exchange rate contracts [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Credit contracts [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	43	1	44
Other Comprehensive Income (Loss)	0	0	14
Purchases	0	0	1
Sales	0	0	0
Issuances	(1)	(3)	(3)
Settlements	(1)	(3)	(12)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance at December 31,	29	43	1
Credit contracts [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Credit contracts [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Credit contracts [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Credit contracts [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Credit contracts [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(10)	47	(42)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(12)	48	(43)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(10)	47	(42)
Credit contracts [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Equity market contracts [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	128	889	142
Other Comprehensive Income (Loss)	0	(3)	1
Purchases	14	19	228
Sales	0	0	0
Issuances	0	(44)	(4)
Settlements	1	(156)	(8)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	(75)
Balance at December 31,	(317)	128	889
Equity market contracts [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Equity market contracts [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	19	29	7
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	19	29	7
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	19	29	7
Equity market contracts [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	(3)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Equity market contracts [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Equity market contracts [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(463)	(593)	601
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(479)	(606)	601
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(463)	(593)	601
Equity market contracts [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Net Embedded Derivatives [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	(3,162)	(4,203)	(2,438)
Other Comprehensive Income (Loss)	300	259	(119)
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	(782)	(598)	(455)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance at December 31,	1,258	(3,162)	(4,203)
Net Embedded Derivatives [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Net Embedded Derivatives [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(135)	78	94
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(139)	75	86
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(135)	78	94
Net Embedded Derivatives [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Net Embedded Derivatives [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Net Embedded Derivatives [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	5,022	1,275	(1,303)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	5,041	1,305	(1,277)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	5,022	1,275	(1,303)
Net Embedded Derivatives [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	7,433	6,784	7,149
Other Comprehensive Income (Loss)	(94)	328	327
Purchases	1,555	1,718	912
Sales	(1,178)	(1,207)	(887)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	1,092	661	169
Transfers out of Level 3	(1,639)	(869)	(914)
Balance at December 31,	7,148	7,433	6,784
U.S. corporate securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. corporate securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. corporate securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	10	14	11
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	8	12	10
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	8	12	10
U.S. corporate securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(31)	4	17
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(39)	(4)	(27)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(39)	(4)	(27)
U.S. corporate securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. corporate securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	6,208	4,370	5,726
Other Comprehensive Income (Loss)	(75)	294	(66)
Purchases	1,972	2,654	1,740
Sales	(999)	(855)	(2,094)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	310	186	211
Transfers out of Level 3	(688)	(383)	(1,165)
Balance at December 31,	6,704	6,208	4,370
Foreign corporate securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign corporate securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign corporate securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	9	20	27
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	8	19	19
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	8	19	19
Foreign corporate securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(33)	(78)	(9)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(3)	(30)	(31)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(3)	(30)	(31)
Foreign corporate securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign corporate securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign government debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	1,814	2,322	3,134
Other Comprehensive Income (Loss)	(84)	45	0
Purchases	734	431	529
Sales	(128)	(673)	(179)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	81	28	123
Transfers out of Level 3	(199)	(350)	(1,303)
Balance at December 31,	2,235	1,814	2,322
Foreign government debt securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign government debt securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign government debt securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	9	14	18
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	9	16	18
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	9	16	18
Foreign government debt securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	8	(3)	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	(3)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	(3)
Foreign government debt securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Foreign government debt securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. Treasury and agency securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	71	31	79
Other Comprehensive Income (Loss)	(3)	0	3
Purchases	0	48	6
Sales	(6)	(8)	(1)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	(56)
Balance at December 31,	62	71	31
U.S. Treasury and agency securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. Treasury and agency securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. Treasury and agency securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. Treasury and agency securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. Treasury and agency securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
U.S. Treasury and agency securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
RMBS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	2,037	1,602	2,541
Other Comprehensive Income (Loss)	155	275	(5)
Purchases	1,155	952	393
Sales	(399)	(704)	(213)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	56	161	20
Transfers out of Level 3	(75)	(269)	(1,103)
Balance at December 31,	2,957	2,037	1,602
RMBS [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
RMBS [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
RMBS [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	31	27	10
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	36	27	11
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	36	27	11
RMBS [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(3)	(7)	(41)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(3)	(4)	(41)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(3)	(4)	(41)
RMBS [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
RMBS [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
CMBS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	1,147	753	1,011
Other Comprehensive Income (Loss)	(45)	(4)	71
Purchases	546	682	283
Sales	(450)	(397)	(178)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	114	177	52
Transfers out of Level 3	(331)	(30)	(495)
Balance at December 31,	972	1,147	753
CMBS [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
CMBS [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
CMBS [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	5	8	25
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	3	2	24
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	3	2	24
CMBS [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(14)	(42)	(16)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(12)	(1)	(14)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(12)	(1)	(14)
CMBS [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
CMBS [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
ABS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	3,656	1,850	3,026
Other Comprehensive Income (Loss)	(70)	(2)	81
Purchases	1,870	2,007	1,033
Sales	(814)	(177)	(659)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	33	6	14
Transfers out of Level 3	(478)	(48)	(1,651)
Balance at December 31,	4,210	3,656	1,850
ABS [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
ABS [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
ABS [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	8	18	24
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	18	20
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	18	20
ABS [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	5	2	(18)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	(10)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	(10)
ABS [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
ABS [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
State and political subdivision securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	54	53	46
Other Comprehensive Income (Loss)	(1)	3	(8)
Purchases	0	5	11
Sales	(7)	(7)	(4)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	0	0	10
Transfers out of Level 3	(36)	0	(2)
Balance at December 31,	10	54	53
State and political subdivision securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
State and political subdivision securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
State and political subdivision securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
State and political subdivision securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
State and political subdivision securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
State and political subdivision securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Common Stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	190	281	268
Other Comprehensive Income (Loss)	0	13	5
Purchases	9	99	106
Sales	(45)	(140)	(46)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	1	3	0
Transfers out of Level 3	(4)	(65)	(66)
Balance at December 31,	177	190	281
Common Stock [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Common Stock [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Common Stock [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Common Stock [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	26	(1)	14
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(3)	(11)	(6)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(3)	(11)	(6)
Common Stock [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Common Stock [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Non-redeemable preferred stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	419	438	905
Other Comprehensive Income (Loss)	100	40	5
Purchases	21	5	3
Sales	(113)	(66)	(416)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	0	0	12
Transfers out of Level 3	0	0	0
Balance at December 31,	395	419	438
Non-redeemable preferred stock [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Non-redeemable preferred stock [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Non-redeemable preferred stock [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Non-redeemable preferred stock [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(32)	2	(71)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(20)	0	(19)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(20)	0	(19)
Non-redeemable preferred stock [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Non-redeemable preferred stock [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Actively traded securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	6	0	10
Other Comprehensive Income (Loss)	0	0	0
Purchases	9	6	0
Sales	0	0	(8)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	0	0	0
Transfers out of Level 3	(3)	0	(2)
Balance at December 31,	12	6	0
Actively traded securities [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Actively traded securities [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Actively traded securities [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Actively traded securities [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Actively traded securities [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Actively traded securities [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	429	590	858
Other Comprehensive Income (Loss)	17	(26)	2
Purchases	256	425	600
Sales	(427)	(559)	(870)
Issuances	0	0	0
Settlements	0	0	0
Transfers into Level 3	0	5	0
Transfers out of Level 3	(1)	(8)	(1)
Balance at December 31,	254	429	590
Short-term Investments [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Short-term Investments [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Short-term Investments [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	3	2	3
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	2	1	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	2	1	0
Short-term Investments [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	(23)	0	(2)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	(1)
Short-term Investments [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Short-term Investments [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Separate account assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	1,205	1,325	1,983
Other Comprehensive Income (Loss)	0	0	0
Purchases	294	244	284
Sales	(319)	(443)	(743)
Issuances	72	2	0
Settlements	0	(1)	0
Transfers into Level 3	240	24	19
Transfers out of Level 3	(62)	(45)	(257)
Balance at December 31,	1,465	1,205	1,325
Separate account assets [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Separate account assets [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Separate account assets [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Separate account assets [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	35	99	39
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Separate account assets [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Separate account assets [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0	0
Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,		666	950
Other Comprehensive Income (Loss)		0	0
Purchases		0	0
Sales		(485)	0
Issuances		43	173
Settlements		(141)	(143)
Transfers into Level 3		0	0
Transfers out of Level 3		0	0
Balance at December 31,		0	666
Mortgage Servicing Rights [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		(83)	(314)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	(282)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	(282)
Mortgage Servicing Rights [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Mortgage Servicing Rights [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Mortgage Servicing Rights [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Mortgage Servicing Rights [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Mortgage Servicing Rights [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)		0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)		0	0
Other Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,			4
Other Comprehensive Income (Loss)			0
Purchases			0
Sales			(4)
Issuances			0
Settlements			0
Transfers into Level 3			0
Transfers out of Level 3			0
Balance at December 31,			0
Other Debt Obligations [Member] | Other Revenues [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)			0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Other Debt Obligations [Member] | Policyholder Benefits and Claims [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)			0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Other Debt Obligations [Member] | Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)			0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Other Debt Obligations [Member] | Net Investment Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)			0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Other Debt Obligations [Member] | Net Derivative Gains (Losses) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)			0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Other Debt Obligations [Member] | Other Expenses [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)			0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)			$ 0