Fair Value (Unobservable Input Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest rate contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 45	$ 11
OCI	10	20
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	(7)	(1)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	48	37
Interest rate contracts | Net investment income
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Interest rate contracts | Net investment gains (losses)
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Interest rate contracts | Net derivative gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	6
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	7
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	6
Interest rate contracts | Policyholder benefits and claims
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Credit contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	1	6
OCI	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	0	4
Credit contracts | Net investment income
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Credit contracts | Net investment gains (losses)
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Credit contracts | Net derivative gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	(2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(1)	(2)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	(2)
Credit contracts | Policyholder benefits and claims
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Equity market contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(242)	(309)
OCI	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	1	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	(273)	(345)
Equity market contracts | Net investment income
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Equity market contracts | Net investment gains (losses)
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Equity market contracts | Net derivative gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(33)	(39)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(33)	(40)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(33)	(39)
Equity market contracts | Policyholder benefits and claims
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	4
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	1	4
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	4
Net Embedded Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(347)	288
OCI	0	1
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	(116)	(210)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	(662)	(262)
Net Embedded Derivatives | Net investment income
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Net Embedded Derivatives | Net investment gains (losses)
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	0	0
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	0	0
Net Embedded Derivatives | Net derivative gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(224)	(349)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	(223)	(356)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	(224)	(349)
Net Embedded Derivatives | Policyholder benefits and claims
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	25	16
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net Income (Loss)	24	15
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	25	16
U.S. corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,355	1,270
OCI	12	29
Purchases	58	23
Sales	(7)	(37)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	35	197
Transfers out of Level 3	(2)	(61)
Balance, end of period	1,452	1,421
U.S. corporate | Net investment income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	1	1
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	1	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)	1	1
U.S. corporate | Net investment gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	(1)
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	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	(1)
U.S. corporate | Net derivative gains (losses)
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
U.S. corporate | Policyholder benefits and claims
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
Foreign corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	710	779
OCI	(10)	16
Purchases	2	3
Sales	(11)	(1)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	8	0
Transfers out of Level 3	0	(40)
Balance, end of period	699	757
Foreign corporate | Net investment income
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
Foreign corporate | Net investment gains (losses)
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
Foreign corporate | Net derivative gains (losses)
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
Foreign corporate | Policyholder benefits and claims
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
RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	716	450
OCI	(1)	3
Purchases	248	146
Sales	(38)	(35)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	14
Transfers out of Level 3	(6)	(19)
Balance, end of period	921	563
RMBS | Net investment income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	2	1
Changes in Unrealized Gains (Losses) Included in Net Income (Loss)	2	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)	2	1
RMBS | Net investment gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	3
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
RMBS | Net derivative gains (losses)
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
RMBS | Policyholder benefits and claims
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
ABS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	181	426
OCI	1	4
Purchases	292	58
Sales	(8)	(6)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(47)	(289)
Balance, end of period	419	193
ABS | Net investment income
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
ABS | Net investment gains (losses)
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
ABS | Net derivative gains (losses)
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
ABS | Policyholder benefits and claims
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
CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	148	129
OCI	0	0
Purchases	74	34
Sales	0	(9)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	6
Transfers out of Level 3	(35)	(16)
Balance, end of period	187	144
CMBS | Net investment income
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
CMBS | Net investment gains (losses)
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
CMBS | Net derivative gains (losses)
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
CMBS | Policyholder benefits and claims
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
Non-redeemable preferred stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	71	100
OCI	(3)	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	8
Transfers out of Level 3	(6)	0
Balance, end of period	62	108
Non-redeemable preferred stock | Net investment income
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
Non-redeemable preferred stock | Net investment gains (losses)
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
Non-redeemable preferred stock | Net derivative gains (losses)
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
Non-redeemable preferred stock | Policyholder benefits and claims
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
Common stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	29	31
OCI	0	(2)
Purchases	0	0
Sales	0	(6)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	6
Transfers out of Level 3	(1)	0
Balance, end of period	28	33
Common stock | Net investment income
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
Common stock | Net investment gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	4
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
Common stock | Net derivative gains (losses)
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
Common stock | Policyholder benefits and claims
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
Short-term Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	71	0
OCI	0	0
Purchases	307	150
Sales	(16)	0
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(55)	0
Balance, end of period	307	150
Short-term Investments | Net investment income
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
Short-term Investments | Net investment gains (losses)
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
Short-term Investments | Net derivative gains (losses)
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
Short-term Investments | Policyholder benefits and claims
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
Separate account assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	158	153
OCI	0	0
Purchases	0	4
Sales	(2)	(2)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	156	160
Separate account assets | Net investment income
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
Separate account assets | Net investment gains (losses)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Income (Loss)	0	5
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
Separate account assets | Net derivative gains (losses)
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
Separate account assets | Policyholder benefits and claims
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