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Unpaid Claims and Claim Expense Short Duration Contracts (Claims Development) (Details) - Life Insurance Product Line [Member] - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013
Claims Development [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net		$ 1,256
Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	1,451
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented	[1]	91
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	1,869
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	[1]	509
Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	4,135
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented	[1]	110
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	4,772
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	[1]	747
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	259	$ 255	$ 251	$ 244	$ 234	$ 221	$ 199	$ 171	$ 131	$ 33
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	276	275	276	277	277	275	262	257	290	267
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		3
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	382	378	374	368	364	356	349	337	305	129
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	402	401	401	399	399	396	397	396	411	$ 408
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	243	240	235	226	214	195	162	115	47
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	259	258	258	258	258	258	242	249	269
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		4
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	450	446	441	437	431	422	407	361	146
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	464	464	463	463	462	462	465	461	$ 460
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	187	180	172	161	148	129	94	37
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	211	210	209	212	213	206	199	220
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		3
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	477	472	467	460	451	437	393	185
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	500	499	498	497	497	501	500	$ 501
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	169	160	147	132	111	84	34
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	198	196	198	210	207	207	205
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		2
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	478	474	468	462	448	403	190
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	503	504	503	504	509	514	$ 485
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2017 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	206	191	171	142	103	31
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	239	239	245	256	262	245
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		4
Short-duration Insurance Contracts, Accident Year 2017 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	494	489	479	465	415	183
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	519	520	517	524	538	$ 538
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2018 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	194	174	136	99	37
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	253	251	260	253	245
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		8
Short-duration Insurance Contracts, Accident Year 2018 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	432	428	418	372	180
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	453	453	456	473	$ 491
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		2
Short-Duration Insurance Contract, Accident Year 2019 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	95	80	53	22
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	145	142	141	145
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		14
Short-Duration Insurance Contract, Accident Year 2019 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	394	388	356	159
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	415	415	426	$ 469
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		3
Short-Duration Insurance Contract, Accident Year 2020 | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	34	23	8
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	61	61	67
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		7
Short-Duration Insurance Contract, Accident Year 2020 | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	454	414	177
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	493	492	$ 509
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		4
Short-Duration Insurance Contract, Accident Year 2021 | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	42	11
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	96	93
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		21
Short-Duration Insurance Contract, Accident Year 2021 | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	395	182
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	480	519
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		33
Short-Duration Insurance Contract, Accident Year 2022 | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]	22
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	131
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		76
Short-Duration Insurance Contract, Accident Year 2022 | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	[1]		$ 179
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	543
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		$ 240
[1] 2014 – 2022 unaudited.

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Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

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Undiscounted amount, after reinsurance, of incurred-but-not-reported (IBNR) liabilities plus expected development on reported claims, for claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

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Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

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Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

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Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense.

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