Assets Measured at Fair Value on Recurring Basis and Utilized Significant Unobservable (Level 3) Inputs to Determine Fair Value (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		$ 3,638	$ 4,061	$ 3,932	$ 4,246
Total realized and unrealized gains (losses), Included in net income		0	7	(6)	4
Total realized and unrealized gains (losses), Included in OCI		(293)	101	(556)	(4)
Purchases		137	83	273	183
Sales		(17)	(2)	(18)	(10)
Issuances		0	1	0	1
Settlements		(18)	(139)	(112)	(239)
Transfer into Level 3	[1]	81	22	102	51
Transfer out of Level 3	[1]	(59)	(245)	(146)	(343)
Ending balance		3,469	3,889	3,469	3,889
Total gains (losses) included in net income attributable to assets still held		(3)	4	3	0
Total gains (losses) included in OCI attributable to assets still held		(287)	80	(543)	(23)
Other invested assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		30	53	42	63
Total realized and unrealized gains (losses), Included in net income		(1)	6	(7)	9
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		3	5	8	10
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(2)	(17)	(13)	(35)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		30	47	30	47
Total gains (losses) included in net income attributable to assets still held		(4)	2	2	4
Total gains (losses) included in OCI attributable to assets still held		0	0	0	0
Other invested assets | Derivative assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		30	53	42	63
Total realized and unrealized gains (losses), Included in net income		(1)	6	(7)	9
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		3	5	8	10
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(2)	(17)	(13)	(35)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		30	47	30	47
Total gains (losses) included in net income attributable to assets still held		(4)	2	2	4
Total gains (losses) included in OCI attributable to assets still held		0	0	0	0
Other invested assets | Derivative assets | Equity index options
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		30	53	42	63
Total realized and unrealized gains (losses), Included in net income		(1)	6	(7)	9
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		3	5	8	10
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(2)	(17)	(13)	(35)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		30	47	30	47
Total gains (losses) included in net income attributable to assets still held		(4)	2	2	4
Total gains (losses) included in OCI attributable to assets still held		0	0	0	0
Reinsurance recoverable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	[2]	17	18	19	26
Total realized and unrealized gains (losses), Included in net income	[2]	2	(1)	0	(9)
Total realized and unrealized gains (losses), Included in OCI	[2]	0	0	0	0
Purchases	[2]	0	0	0	0
Sales	[2]	0	0	0	0
Issuances	[2]	0	1	0	1
Settlements	[2]	0	0	0	0
Transfer into Level 3	[1],[2]	0	0	0	0
Transfer out of Level 3	[1],[2]	0	0	0	0
Ending balance	[2]	19	18	19	18
Total gains (losses) included in net income attributable to assets still held	[2]	2	(1)	0	(9)
Total gains (losses) included in OCI attributable to assets still held	[2]	0	0	0	0
Fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		3,529	3,922	3,808	4,089
Total realized and unrealized gains (losses), Included in net income		2	1	4	3
Total realized and unrealized gains (losses), Included in OCI		(293)	101	(556)	(4)
Purchases		134	78	265	165
Sales		(16)	(2)	(17)	(2)
Issuances		0	0	0	0
Settlements		(16)	(117)	(99)	(199)
Transfer into Level 3	[1]	81	22	102	51
Transfer out of Level 3	[1]	(59)	(245)	(145)	(343)
Ending balance		3,362	3,760	3,362	3,760
Total gains (losses) included in net income attributable to assets still held		2	2	4	4
Total gains (losses) included in OCI attributable to assets still held		(287)	80	(543)	(23)
Fixed maturity securities | State and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		71	68	82	66
Total realized and unrealized gains (losses), Included in net income		1	1	2	2
Total realized and unrealized gains (losses), Included in OCI		(9)	6	(21)	7
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		63	75	63	75
Total gains (losses) included in net income attributable to assets still held		1	1	2	2
Total gains (losses) included in OCI attributable to assets still held		(9)	6	(21)	7
Fixed maturity securities | U.S. corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		2,269	2,150	2,381	2,272
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(206)	55	(373)	(13)
Purchases		85	63	191	101
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(14)	(16)	(31)	(74)
Transfer into Level 3	[1]	70	22	70	49
Transfer out of Level 3	[1]	(54)	(72)	(88)	(133)
Ending balance		2,150	2,202	2,150	2,202
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(199)	50	(364)	(16)
Fixed maturity securities | U.S. corporate | Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		912	793	950	842
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(92)	23	(165)	(7)
Purchases		0	8	35	16
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(1)	(1)	(14)
Transfer into Level 3	[1]	2	19	2	19
Transfer out of Level 3	[1]	(11)	0	(11)	(14)
Ending balance		810	842	810	842
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(92)	23	(165)	(6)
Fixed maturity securities | U.S. corporate | Energy
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		72	122	76	128
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(11)	8	(15)	4
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(7)	(1)	(7)	(3)
Transfer into Level 3	[1]	68	0	68	0
Transfer out of Level 3	[1]	0	(52)	0	(52)
Ending balance		122	77	122	77
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(11)	4	(15)	0
Fixed maturity securities | U.S. corporate | Finance and insurance
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		676	597	685	607
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(67)	17	(123)	(5)
Purchases		85	55	151	73
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(8)	(3)	(25)
Transfer into Level 3	[1]	0	0	0	17
Transfer out of Level 3	[1]	(39)	0	(56)	(6)
Ending balance		654	661	654	661
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(61)	17	(116)	(5)
Fixed maturity securities | U.S. corporate | Consumer-non-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		92	106	104	109
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(6)	2	(11)	(1)
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	(2)	(7)	(2)
Transfer into Level 3	[1]	0	3	0	3
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		86	109	86	109
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(5)	1	(11)	(2)
Fixed maturity securities | U.S. corporate | Technology and communications
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		28	40	29	47
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(3)	2	(4)	0
Purchases		0	0	0	12
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	4
Transfer out of Level 3	[1]	0	(12)	0	(33)
Ending balance		25	30	25	30
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(3)	1	(4)	(1)
Fixed maturity securities | U.S. corporate | Industrial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		35	20	37	40
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(2)	0	(4)	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	(20)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		33	20	33	20
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(2)	0	(4)	0
Fixed maturity securities | U.S. corporate | Capital goods
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		41	58	45	60
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(3)	1	(7)	(1)
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		38	59	38	59
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(3)	1	(6)	(1)
Fixed maturity securities | U.S. corporate | Consumer-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		127	147	137	150
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(7)	1	(15)	(1)
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(1)	(3)	(2)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	(8)	0	(8)
Ending balance		119	139	119	139
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(7)	1	(15)	(1)
Fixed maturity securities | U.S. corporate | Transportation
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		64	67	64	70
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(3)	1	(6)	0
Purchases		0	0	5	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(1)	(3)	(3)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	(4)	0	(4)	0
Ending balance		56	67	56	67
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(3)	1	(6)	0
Fixed maturity securities | U.S. corporate | Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		222	200	254	219
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(12)	0	(23)	(2)
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(3)	(2)	(7)	(5)
Transfer into Level 3	[1]	0	0	0	6
Transfer out of Level 3	[1]	0	0	(17)	(20)
Ending balance		207	198	207	198
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(12)	1	(22)	0
Fixed maturity securities | Non-U.S. corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		1,040	1,576	1,162	1,608
Total realized and unrealized gains (losses), Included in net income		1	0	2	1
Total realized and unrealized gains (losses), Included in OCI		(70)	38	(145)	2
Purchases		3	14	13	60
Sales		(10)	(2)	(10)	(2)
Issuances		0	0	0	0
Settlements		(1)	(95)	(63)	(115)
Transfer into Level 3	[1]	11	0	28	0
Transfer out of Level 3	[1]	(1)	(169)	(14)	(192)
Ending balance		973	1,362	973	1,362
Total gains (losses) included in net income attributable to assets still held		1	1	2	2
Total gains (losses) included in OCI attributable to assets still held		(70)	22	(143)	(14)
Fixed maturity securities | Non-U.S. corporate | Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		334	375	345	352
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(25)	5	(46)	(2)
Purchases		0	0	10	30
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	(8)	0	(8)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	(24)	0	(24)
Ending balance		309	348	309	348
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(24)	4	(45)	(3)
Fixed maturity securities | Non-U.S. corporate | Energy
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		138	243	145	245
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(7)	10	(14)	8
Purchases		3	0	3	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(22)	(1)	(22)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	(79)	0	(79)
Ending balance		133	152	133	152
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(8)	5	(15)	3
Fixed maturity securities | Non-U.S. corporate | Finance and insurance
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		143	290	160	305
Total realized and unrealized gains (losses), Included in net income		1	0	2	1
Total realized and unrealized gains (losses), Included in OCI		(12)	17	(30)	1
Purchases		0	0	0	0
Sales		0	(2)	0	(2)
Issuances		0	0	0	0
Settlements		0	(52)	0	(52)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	(51)	0	(51)
Ending balance		132	202	132	202
Total gains (losses) included in net income attributable to assets still held		1	1	2	2
Total gains (losses) included in OCI attributable to assets still held		(12)	5	(30)	(11)
Fixed maturity securities | Non-U.S. corporate | Consumer-non-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		60	66	63	67
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(4)	0	(7)	(1)
Purchases		0	8	0	8
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	11	0	11	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		67	74	67	74
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(4)	0	(7)	(1)
Fixed maturity securities | Non-U.S. corporate | Technology and communications
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		27	28	28	28
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	0	(2)	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		26	28	26	28
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(1)	0	(2)	0
Fixed maturity securities | Non-U.S. corporate | Industrial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		74	93	93	95
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(4)	1	(10)	(1)
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	(1)	0	(14)	0
Ending balance		69	94	69	94
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(5)	1	(9)	(1)
Fixed maturity securities | Non-U.S. corporate | Capital goods
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		132	175	173	178
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(7)	1	(15)	(2)
Purchases		0	5	0	5
Sales		(10)	0	(10)	0
Issuances		0	0	0	0
Settlements		0	0	(33)	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		115	181	115	181
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(7)	2	(15)	(1)
Fixed maturity securities | Non-U.S. corporate | Consumer-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		86	144	76	146
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(7)	2	(14)	0
Purchases		0	1	0	17
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	17	0
Transfer out of Level 3	[1]	0	0	0	(16)
Ending balance		79	147	79	147
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(7)	2	(14)	0
Fixed maturity securities | Non-U.S. corporate | Transportation
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		22	82	53	109
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	1	(3)	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	(29)	(19)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	(7)
Ending balance		21	83	21	83
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(1)	2	(3)	1
Fixed maturity securities | Non-U.S. corporate | Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		24	80	26	83
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(2)	1	(4)	(1)
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	(13)	0	(14)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	(15)	0	(15)
Ending balance		22	53	22	53
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(1)	1	(3)	(1)
Fixed maturity securities | Residential mortgage-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		33	13	27	14
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(2)	1	(3)	0
Purchases		4	0	13	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(1)	(2)	(1)
Transfer into Level 3	[1]	0	0	4	0
Transfer out of Level 3	[1]	(4)	0	(9)	0
Ending balance		30	13	30	13
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(2)	0	(2)	0
Fixed maturity securities | Commercial mortgage-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		15	19	16	20
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	0	(2)	(1)
Purchases		0	1	0	1
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		14	20	14	20
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(2)	1	(3)	(1)
Fixed maturity securities | Other asset-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		100	96	138	109
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(5)	1	(12)	1
Purchases		40	0	46	3
Sales		(6)	0	(6)	0
Issuances		0	0	0	0
Settlements		0	(5)	(3)	(9)
Transfer into Level 3	[1]	0	0	0	2
Transfer out of Level 3	[1]	0	(4)	(34)	(18)
Ending balance		129	88	129	88
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		(5)	1	(10)	1
Fixed maturity securities | Non-U.S. government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		1		2
Total realized and unrealized gains (losses), Included in net income		0		0
Total realized and unrealized gains (losses), Included in OCI		0		0
Purchases		2		2
Sales		0		(1)
Issuances		0		0
Settlements		0		0
Transfer into Level 3	[1]	0		0
Transfer out of Level 3	[1]	0		0
Ending balance		3		3
Total gains (losses) included in net income attributable to assets still held		0		0
Total gains (losses) included in OCI attributable to assets still held		0		0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		36	43	37	51
Total realized and unrealized gains (losses), Included in net income		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		0	0	0	0
Sales		(1)	0	(1)	(8)
Issuances		0	0	0	0
Settlements		0	(5)	0	(5)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	(1)	0
Ending balance		35	38	35	38
Total gains (losses) included in net income attributable to assets still held		0	0	0	0
Total gains (losses) included in OCI attributable to assets still held		0	0	0	0
Limited Partnerships
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		26	25	26	17
Total realized and unrealized gains (losses), Included in net income		(3)	1	(3)	1
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		0	0	0	8
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		23	26	23	26
Total gains (losses) included in net income attributable to assets still held		(3)	1	(3)	1
Total gains (losses) included in OCI attributable to assets still held		$ 0	$ 0	$ 0	$ 0

[1] The transfers into and out of Level 3 for fixed maturity securities were related to changes in the primary pricing source and changes in the observability of external information used in determining the fair value, such as external ratings or credit spreads, as well as changes in the industry sectors assigned to specific securities.

[2] Represents embedded derivatives associated with the reinsured portion of our GMWB liabilities.