Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity securities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	$ 728	$ 594	$ 660	$ 633
Purchases	33	19	91	28
Sales	(59)	(5)	(62)	(10)
Issuances	0	0	0	0
Settlements	(6)	0	(9)	0
Other	(1)	0	(23)	1
Transfers into Level 3	36	0	36	0
Transfers out of Level 3	(35)	0	(35)	0
Fair Value, end of period	715	594	715	594
Total gains (losses) (realized/unrealized):
Included in earnings	19	(14)	57	(58)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	16	(16)	51	(60)
Equity securities | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Equity securities | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	19	(14)	57	(58)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	16	(16)	51	(60)
Equity securities | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Equity securities | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Equity securities | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Assets supporting experience-rated contractholder liabilities | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Assets supporting experience-rated contractholder liabilities | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	12	18	0	(29)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	12	19	(5)	(25)
Assets supporting experience-rated contractholder liabilities | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Assets supporting experience-rated contractholder liabilities | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Assets supporting experience-rated contractholder liabilities | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	2	3	4	0
Assets supporting experience-rated contractholder liabilities | Foreign government bonds
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	19	24	19	24
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(2)	0	(2)	0
Other	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	17	24	17	24
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Assets supporting experience-rated contractholder liabilities | Corporate securities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	538	603	482	637
Purchases	2	0	16	4
Sales	0	1	0	(9)
Issuances	0	0	0	0
Settlements	(9)	(20)	(28)	(65)
Other	0	0	0	0
Transfers into Level 3	3	29	71	92
Transfers out of Level 3	0	(8)	0	(8)
Fair Value, end of period	549	624	549	624
Total gains (losses) (realized/unrealized):
Included in earnings	15	19	8	(27)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	13	17	(1)	(27)
Assets supporting experience-rated contractholder liabilities | Structured securities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	219	177	114	69
Purchases	36	39	173	155
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(11)	(6)	(22)	(10)
Other	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(129)	(113)	(147)	(113)
Fair Value, end of period	114	99	114	99
Total gains (losses) (realized/unrealized):
Included in earnings	(1)	2	(4)	(2)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(1)	2	(4)	2
Assets supporting experience-rated contractholder liabilities | Equity securities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	0	0	0	0
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Assets supporting experience-rated contractholder liabilities | All other activity
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	20	7	20	0
Purchases	0	0	0	7
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(20)	0	(20)	0
Other	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	0	7	0	7
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other invested assets
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	378	581	366	567
Purchases	24	54	24	81
Sales	(14)	0	(14)	0
Issuances	0	4	0	4
Settlements	0	(3)	0	(4)
Other	0	26	0	6
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	393	658	393	658
Total gains (losses) (realized/unrealized):
Included in earnings	5	(4)	17	4
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	4	3	17	5
Other invested assets | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	4	0	15	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	2	7	15	1
Other invested assets | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	1	(4)	2	4
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	2	(4)	2	4
Other invested assets | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other invested assets | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other invested assets | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Short-term investments
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	396	53	177	155
Purchases	197	1	453	44
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(153)	0	(163)	(110)
Other	(1)	(10)	(27)	(47)
Transfers into Level 3	5	0	5	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	445	44	445	44
Total gains (losses) (realized/unrealized):
Included in earnings	1	0	0	2
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	(1)	0
Short-term investments | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	1	0	0	2
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	(1)	0
Short-term investments | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Short-term investments | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Short-term investments | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Short-term investments | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Cash equivalents
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	4	1	1	131
Purchases	1	0	4	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	(3)	0	(3)	(130)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	1	1	1	1
Total gains (losses) (realized/unrealized):
Included in earnings	(1)	0	(1)	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(1)	0	(1)	0
Cash equivalents | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	(1)	0	(1)	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(1)	0	(1)	0
Cash equivalents | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Cash equivalents | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Cash equivalents | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Cash equivalents | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Other assets
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	144	382	268	113
Purchases	12	19	24	36
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(2)	0	(5)	0
Other	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	190	377	190	377
Total gains (losses) (realized/unrealized):
Included in earnings	36	(24)	(97)	228
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	33	(22)	(100)	229
Other assets | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	36	(24)	(97)	228
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	33	(22)	(100)	229
Other assets | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other assets | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other assets | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other assets | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Separate accounts assets
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	1,306	1,528	1,821	1,717
Purchases	81	48	149	104
Sales	(14)	(8)	(27)	(21)
Issuances	0	0	0	0
Settlements	(6)	(15)	(12)	(33)
Other	0	0	(615)	0
Transfers into Level 3	8	26	30	33
Transfers out of Level 3	(64)	(9)	(78)	(90)
Fair Value, end of period	1,476	1,684	1,476	1,684
Total gains (losses) (realized/unrealized):
Included in earnings	165	114	208	(26)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	141	112	215	(17)
Separate accounts assets | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Separate accounts assets | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Separate accounts assets | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	165	114	208	(26)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	141	112	215	(17)
Separate accounts assets | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Separate accounts assets | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Future policy benefits
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	(11,314)	(27,935)	(18,879)	(12,831)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	(331)	(322)	(662)	(641)
Settlements	0	0	0	0
Other	12	(2)	12	2
Transfers Into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	(13,579)	(26,439)	(13,579)	(26,439)
Total gains (losses) (realized/unrealized):
Included in earnings	(1,946)	1,820	5,950	(12,969)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(1,939)	1,565	5,530	(13,183)
Future policy benefits | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	(1,946)	1,820	5,950	(12,969)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(1,939)	1,565	5,530	(13,183)
Future policy benefits | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Future policy benefits | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Future policy benefits | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings		0	0	0
Future policy benefits | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Policyholders' account balances
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	(2,171)	(1,206)	(1,914)	(1,316)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	(106)	(101)	(228)	(197)
Settlements	0	0	0	0
Other	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	(2,690)	(1,441)	(2,690)	(1,441)
Total gains (losses) (realized/unrealized):
Included in earnings	(413)	(134)	(548)	72
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(363)	(127)	(462)	63
Policyholders' account balances | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	(413)	(134)	(548)	72
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	(363)	(127)	(462)	63
Policyholders' account balances | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Policyholders' account balances | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Policyholders' account balances | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Policyholders' account balances | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Other liabilities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	0	(47)	0	(105)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	0	0	0	0
Total gains (losses) (realized/unrealized):
Included in earnings	0	47	0	105
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	47	0	104
Other liabilities | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other liabilities | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	47	0	105
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	47	0	104
Other liabilities | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other liabilities | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Other liabilities | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Notes Issued by Consolidated VIEs
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	0	(799)	0	(800)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	0	(741)	0	(741)
Total gains (losses) (realized/unrealized):
Included in earnings	0	58	0	59
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	59	0	59
Notes Issued by Consolidated VIEs | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	0	(1)	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Notes Issued by Consolidated VIEs | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	59	0	59
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	59	0	59
Notes Issued by Consolidated VIEs | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Notes Issued by Consolidated VIEs | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Notes Issued by Consolidated VIEs | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Available-for-sale | Fixed maturities | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	57	(88)	29	(115)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	38	(80)	(2)	(106)
Available-for-sale | Fixed maturities | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Available-for-sale | Fixed maturities | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Available-for-sale | Fixed maturities | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	136	407	(164)	(76)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	121	406	(189)	(74)
Available-for-sale | Fixed maturities | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	0	3	2	5
Available-for-sale | Fixed maturities | U.S. government
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	150	115	150	105
Purchases	0	7	0	17
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	150	122	150	122
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Available-for-sale | Fixed maturities | U.S. states
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	4	4	4	4
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	5	0	5	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, end of period	9	4	9	4
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Available-for-sale | Fixed maturities | Foreign government bonds
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	11	21	11	22
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(1)	0	(1)	0
Other	0	0	0	0
Transfers into Level 3	0	1	0	1
Transfers out of Level 3	0	(1)	0	(1)
Fair Value, end of period	10	21	10	21
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	(1)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	(1)	0	(1)
Available-for-sale | Fixed maturities | Corporate securities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	5,277	4,496	5,335	3,236
Purchases	444	125	687	419
Sales	(21)	(5)	(21)	(118)
Issuances	20	0	20	0
Settlements	(317)	(95)	(494)	(330)
Other	(1)	0	1	1
Transfers into Level 3	70	196	289	2,023
Transfers out of Level 3	(127)	(131)	(127)	(145)
Fair Value, end of period	5,528	4,904	5,528	4,904
Total gains (losses) (realized/unrealized):
Included in earnings	183	318	(162)	(182)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	159	316	(203)	(175)
Available-for-sale | Fixed maturities | Structured securities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	830	948	543	948
Purchases	557	73	776	388
Sales	(1)	0	(1)	(17)
Issuances	0	0	0	0
Settlements	(106)	(197)	(180)	(297)
Other	2	0	14	155
Transfers into Level 3	0	80	311	92
Transfers out of Level 3	(418)	(107)	(618)	(465)
Fair Value, end of period	874	801	874	801
Total gains (losses) (realized/unrealized):
Included in earnings	10	4	29	(3)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	11	12	(4)
Trading | Fixed maturities
Fair Value, Assets And Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period	242	249	243	287
Purchases	22	4	23	22
Sales	(6)	(26)	(8)	(32)
Issuances	0	0	0	0
Settlements	0	0	0	0
Other	2	10	2	8
Transfers into Level 3	0	0	0	15
Transfers out of Level 3	(2)	0	(2)	(48)
Fair Value, end of period	269	236	269	236
Total gains (losses) (realized/unrealized):
Included in earnings	11	(1)	11	(16)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	11	(1)	11	(16)
Trading | Fixed maturities | Realized investment gains (losses), net
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Trading | Fixed maturities | Other income
Total gains (losses) (realized/unrealized):
Included in earnings	11	(2)	11	(17)
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	11	(1)	11	(16)
Trading | Fixed maturities | Interest credited to policyholders’ account balances
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Trading | Fixed maturities | Included in other comprehensive income (loss)
Total gains (losses) (realized/unrealized):
Included in earnings	0	0	0	0
Unrealized gains (losses) for assets/liabilities still held:
Included in earnings	0	0	0	0
Trading | Fixed maturities | Net investment income
Total gains (losses) (realized/unrealized):
Included in earnings	$ 0	$ 1	$ 0	$ 1