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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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		$ 3,154	$ 3,181	$ 3,221	$ 3,254
Total realized and unrealized gains (losses) included in net income, assets		$ 0	$ 7	$ 7	$ 9
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total realized and unrealized gains (losses), Included in OCI		$ (47)	$ (41)	$ (97)	$ 11
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]		Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Purchases		$ 113	$ 70	$ 174	$ 159
Sales		(25)	(36)	(25)	(65)
Issuances		0	0	0	0
Settlements		(113)	(51)	(210)	(193)
Transfer into Level 3	[1]	22	41	41	54
Transfer out of Level 3	[1]	(18)	(60)	(25)	(118)
Ending balance		3,086	3,111	3,086	3,111
Total gains (losses) included in net income attributable to assets still held		$ 1	$ 6	$ 7	$ 7
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total gains (losses) included in OCI attributable to assets still held		$ (47)	$ (52)	$ (100)	$ (9)
Other invested assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		61	10	73	6
Total realized and unrealized gains (losses) included in net income, assets		1	5	6	6
Total realized and unrealized gains (losses), Included in OCI		(20)	0	(30)	0
Purchases		4	9	8	12
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(4)	(2)	(15)	(2)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		42	22	42	22
Total gains (losses) included in net income attributable to assets still held		2	4	6	5
Total gains (losses) included in OCI attributable to assets still held		(15)	0	(28)	0
Other invested assets | Short-term investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance			0	7	0
Total realized and unrealized gains (losses) included in net income, assets			0	0	0
Total realized and unrealized gains (losses), Included in OCI			0	0	0
Purchases			7	0	7
Sales			0	0	0
Issuances			0	0	0
Settlements			0	(7)	0
Transfer into Level 3	[1]		0	0	0
Transfer out of Level 3	[1]		0	0	0
Ending balance		0	7	0	7
Total gains (losses) included in net income attributable to assets still held			0	0	0
Total gains (losses) included in OCI attributable to assets still held			0	0	0
Other invested assets | Derivative assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		61	10	66	6
Total realized and unrealized gains (losses) included in net income, assets		1	5	6	6
Total realized and unrealized gains (losses), Included in OCI		(20)	0	(30)	0
Purchases		4	2	8	5
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(4)	(2)	(8)	(2)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		42	15	42	15
Total gains (losses) included in net income attributable to assets still held		2	4	6	5
Total gains (losses) included in OCI attributable to assets still held		(15)	0	(28)	0
Other invested assets | Derivative assets | Equity index options
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		20	10	15	6
Total realized and unrealized gains (losses) included in net income, assets		1	5	6	6
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		4	2	8	5
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(4)	(2)	(8)	(2)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		21	15	21	15
Total gains (losses) included in net income attributable to assets still held		2	4	6	5
Total gains (losses) included in OCI attributable to assets still held		0	0	0	0
Other invested assets | Derivative assets | Forward bond purchase commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		41		51
Total realized and unrealized gains (losses) included in net income, assets		0		0
Total realized and unrealized gains (losses), Included in OCI		(20)		(30)
Purchases		0		0
Sales		0		0
Issuances		0		0
Settlements		0		0
Transfer into Level 3	[1]	0		0
Transfer out of Level 3	[1]	0		0
Ending balance		21		21
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		(15)		(28)
Fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		3,042	3,116	3,096	3,190
Total realized and unrealized gains (losses) included in net income, assets		2	3	5	6
Total realized and unrealized gains (losses), Included in OCI		(27)	(41)	(67)	11
Purchases		91	60	148	146
Sales		(17)	(32)	(17)	(60)
Issuances		0	0	0	0
Settlements		(109)	(49)	(195)	(191)
Transfer into Level 3	[1]	22	41	41	54
Transfer out of Level 3	[1]	(18)	(60)	(25)	(118)
Ending balance		2,986	3,038	2,986	3,038
Total gains (losses) included in net income attributable to assets still held		2	3	5	5
Total gains (losses) included in OCI attributable to assets still held		(32)	(52)	(72)	(9)
Fixed maturity securities | State and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		65	59	60	55
Total realized and unrealized gains (losses) included in net income, assets		1	1	2	2
Total realized and unrealized gains (losses), Included in OCI		(1)	0	3	3
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		65	60	65	60
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		(1)	0	3	3
Fixed maturity securities | U.S. corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		2,064	2,115	2,090	2,122
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(16)	(21)	(48)	(1)
Purchases		20	49	52	104
Sales		(17)	(31)	(17)	(41)
Issuances		0	0	0	0
Settlements		(85)	(47)	(130)	(91)
Transfer into Level 3	[1]	22	11	41	24
Transfer out of Level 3	[1]	(4)	(60)	(4)	(101)
Ending balance		1,984	2,016	1,984	2,016
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		(22)	(32)	(54)	(12)
Fixed maturity securities | U.S. corporate | Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		867	859	881	842
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(15)	(11)	(35)	0
Purchases		0	0	32	40
Sales		(13)	(31)	(13)	(40)
Issuances		0	0	0	0
Settlements		0	(10)	(26)	(10)
Transfer into Level 3	[1]	8	11	8	11
Transfer out of Level 3	[1]	(4)	0	(4)	(25)
Ending balance		843	818	843	818
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		(17)	(18)	(37)	(8)
Fixed maturity securities | U.S. corporate | Energy
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		60	115	60	116
Total realized and unrealized gains (losses) included in net income, assets		(1)	0	(1)	0
Total realized and unrealized gains (losses), Included in OCI		1	0	1	1
Purchases		0	0	0	0
Sales		(4)	0	(4)	(1)
Issuances		0	0	0	0
Settlements		(11)	(1)	(11)	(2)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	(55)	0	(55)
Ending balance		45	59	45	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		0	(1)	0	1
Fixed maturity securities | U.S. corporate | Finance and insurance
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		730	697	717	687
Total realized and unrealized gains (losses) included in net income, assets		1	0	1	0
Total realized and unrealized gains (losses), Included in OCI		0	(6)	(6)	(3)
Purchases		0	48	0	63
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(65)	(30)	(65)	(35)
Transfer into Level 3	[1]	14	0	33	0
Transfer out of Level 3	[1]	0	(5)	0	(8)
Ending balance		680	704	680	704
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)	(10)	(9)	(6)
Fixed maturity securities | U.S. corporate | Consumer-non-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		64	69	69	82
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	(1)	(1)	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	(5)	(14)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		63	68	63	68
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)	(1)	0
Fixed maturity securities | U.S. corporate | Technology and communications
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		12	12	12	24
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	(1)	0	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	(13)
Ending balance		12	11	12	11
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
Fixed maturity securities | U.S. corporate | Industrial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		15	22	23	22
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	(8)	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		15	22	15	22
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
Fixed maturity securities | U.S. corporate | Capital goods
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		34	34	35	34
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	(1)	0
Purchases		20	0	20	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		54	34	54	34
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	(1)	(1)	0
Fixed maturity securities | U.S. corporate | Consumer-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		118	127	122	113
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	(2)	(3)	0
Purchases		0	1	0	1
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(2)	(2)	(3)
Transfer into Level 3	[1]	0	0	0	13
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		117	124	117	124
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	(2)	(3)	0
Fixed maturity securities | U.S. corporate | Transportation
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		21	24	22	43
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	(1)	0	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	0	(2)	(20)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		20	23	20	23
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
Fixed maturity securities | U.S. corporate | Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		143	156	149	159
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	1	(3)	1
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(7)	(4)	(11)	(7)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		135	153	135	153
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 | Non-U.S. corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		791	827	830	885
Total realized and unrealized gains (losses) included in net income, assets		1	2	3	4
Total realized and unrealized gains (losses), Included in OCI		(9)	(20)	(21)	6
Purchases		46	1	56	30
Sales		0	0	0	(18)
Issuances		0	0	0	0
Settlements		(18)	(1)	(57)	(98)
Transfer into Level 3	[1]	0	30	0	30
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		811	839	811	839
Total gains (losses) included in net income attributable to assets still held		1	2	3	3
Total gains (losses) included in OCI attributable to assets still held		(9)	(19)	(20)	(1)
Fixed maturity securities | Non-U.S. corporate | Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		260	298	269	295
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(5)	(9)	(9)	(4)
Purchases		25	1	35	4
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	(15)	(5)
Transfer into Level 3	[1]	0	30	0	30
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		280	320	280	320
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		(6)	(8)	(10)	(3)
Fixed maturity securities | Non-U.S. corporate | Energy
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		130	119	131	118
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	(2)	(1)	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(11)	0	(11)	(1)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		119	117	119	117
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	(2)	(1)	0
Fixed maturity securities | Non-U.S. corporate | Finance and insurance
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		132	131	134	125
Total realized and unrealized gains (losses) included in net income, assets		1	2	3	3
Total realized and unrealized gains (losses), Included in OCI		0	(7)	(4)	(2)
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		133	126	133	126
Total gains (losses) included in net income attributable to assets still held		1	2	3	3
Total gains (losses) included in OCI attributable to assets still held		0	(6)	(4)	(2)
Fixed maturity securities | Non-U.S. corporate | Consumer-non-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		77	73	81	73
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	(1)	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	(3)	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		77	73	77	73
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)	(1)	0
Fixed maturity securities | Non-U.S. corporate | Technology and communications
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		24	26	24	26
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(7)	0	(7)	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		17	26	17	26
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
Fixed maturity securities | Non-U.S. corporate | Industrial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		61	75	63	48
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	0	(2)	2
Purchases		0	0	0	25
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		0	0	(1)	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		60	75	60	75
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)	(2)	1
Fixed maturity securities | Non-U.S. corporate | Capital goods
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		33	52	53	95
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	1
Total realized and unrealized gains (losses), Included in OCI		(2)	(1)	(2)	3
Purchases		14	0	14	0
Sales		0	0	0	(12)
Issuances		0	0	0	0
Settlements		0	0	(20)	(36)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		45	51	45	51
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	(1)	2
Fixed maturity securities | Non-U.S. corporate | Consumer-cyclical
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		1	9	1	64
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	1	(1)	7
Purchases		7	0	7	0
Sales		0	0	0	(6)
Issuances		0	0	0	0
Settlements		0	(1)	0	(56)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		7	9	7	9
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	1
Fixed maturity securities | Non-U.S. corporate | Transportation
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		22	22	22	20
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	(1)	0	0
Purchases		0	0	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		22	21	22	21
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	(1)	0	0
Fixed maturity securities | Non-U.S. corporate | Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		51	22	52	21
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	(1)	(1)	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		51	21	51	21
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	(1)	0
Fixed maturity securities | Residential mortgage-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		3	8	3	22
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	1	0	2
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(1)	(1)	(1)	(1)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	(15)
Ending balance		2	8	2	8
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
Fixed maturity securities | Commercial mortgage-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		11	12	11	12
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		0	0	0	0
Sales		0	(1)	0	(1)
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		11	11	11	11
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
Fixed maturity securities | Other asset-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		108	95	102	94
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		(1)	(1)	(1)	1
Purchases		25	10	40	12
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements		(5)	0	(7)	(1)
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	(14)	0	(21)	(2)
Ending balance		113	104	113	104
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	(1)	(1)	1
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		32	33	32	34
Total realized and unrealized gains (losses) included in net income, assets		0	0	0	0
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		18	1	18	1
Sales		(8)	(4)	(8)	(5)
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		42	30	42	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		0	0	0	0
Limited partnerships
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		19	22	20	24
Total realized and unrealized gains (losses) included in net income, assets		(3)	(1)	(4)	(3)
Total realized and unrealized gains (losses), Included in OCI		0	0	0	0
Purchases		0	0	0	0
Sales		0	0	0	0
Issuances		0	0	0	0
Settlements			0	0	0
Transfer into Level 3	[1]	0	0	0	0
Transfer out of Level 3	[1]	0	0	0	0
Ending balance		16	21	16	21
Total gains (losses) included in net income attributable to assets still held		(3)	(1)	(4)	(3)
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.

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