Segment Information (Reconciliation of Income before Income Taxes from Segments to Consolidated) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		$ 225	$ 214	$ 269	$ 272	$ 164	$ 380	$ 265	$ 351	$ 980	$ 1,160	$ 718
Revenues		$ 5,241	$ 5,651	$ 4,878	$ 6,337	$ 5,007	$ 5,153	$ 4,156	$ 4,251	22,107	18,567	16,227
Investment Income, Investment Expense										196	164	127
Claims and other policy benefits										16,903	13,872	11,982
Liability for Future Policy Benefit, Remeasurement Gain (Loss)										32	62	(291)
Interest credited										1,087	864	682
Interest expense										304	257	191
Other operating expenses										1,268	1,089	1,009
Other revenues										593	372	527
Market Risk Benefit, Change in Fair Value, Gain (Loss)										44	10	(10)
Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest										1,752	1,699	1,217
Revenues										22,788	19,075	16,793
Gain (Loss), Investment and Derivative, Operating, before Tax										(897)	(360)	(425)
Embedded Derivative, Gain on Embedded Derivative										116	(163)	(173)
Investment Income, Investment Expense										(3)	5	(24)
Embedded Derivative, Loss on Embedded Derivative										(15)	6	53
Other Nonoperating Expense										(3)	(1)	(24)
Other Nonoperating Income										3	1	24
Unrecognized Tax Benefits, Period Increase (Decrease)										(1)	0	0
Other Non Operating Reconciling Items	[1]									(16)	(37)	(80)
Other revenues	[2]									106	11	80
Market Risk Benefit, Change in Fair Value, Gain (Loss)										44	10	(10)
Corporate And Other Segment Reporting Information [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									(171)	(128)	(162)
Revenues										587	441	293
Claims and other policy benefits	[3]									0	0	0
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									0	0	0
Interest credited	[3]									150	61	32
Interest expense	[3]									303	257	191
Other operating expenses	[3],[4]									305	251	232
Life Insurance Product Line [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Claims and other policy benefits										16,871	13,810	12,273
Life Insurance Product Line [Member] | Other Operating Segment | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest credited										118	67
Life Insurance Product Line [Member] | Other Operating Segment | Americas [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									525	313	147
Revenues										8,429	7,818	7,517
Claims and other policy benefits	[3]									6,846	6,429	6,133
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									(109)	74	262
Interest credited	[3]									119	75	69
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									1,048	927	906
Life Insurance Product Line [Member] | Other Operating Segment | CANADA | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									134	91	108
Revenues										1,557	1,472	1,479
Claims and other policy benefits	[3]									1,194	1,130	1,129
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									(11)	22	(2)
Interest credited	[3]									1	1	0
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									239	228	244
Life Insurance Product Line [Member] | Other Operating Segment | EMEA [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									30	(20)	46
Revenues										2,125	1,866	1,818
Claims and other policy benefits	[3]									1,805	1,622	1,586
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									48	48	(15)
Interest credited	[3]									0	0	0
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									242	216	201
Life Insurance Product Line [Member] | Other Operating Segment | Asia Pacific [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									282	373	194
Revenues										3,297	3,050	2,882
Claims and other policy benefits	[3]									2,582	2,340	2,192
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									34	(56)	100
Interest credited	[3]									0	0	0
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									399	393	396
Insurance, Other [Member] | Other Operating Segment | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest credited										575	574
Insurance, Other [Member] | Other Operating Segment | Americas [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									326	451	448
Revenues										4,492	2,879	1,392
Claims and other policy benefits	[3]									3,187	1,646	205
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									1	(29)	(28)
Interest credited	[3]									519	531	539
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									459	280	228
Insurance, Other [Member] | Other Operating Segment | CANADA | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									26	52	31
Revenues										331	106	110
Claims and other policy benefits	[3]									307	78	86
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									0	(30)	(12)
Interest credited	[3]									0	0	0
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									(2)	6	5
Insurance, Other [Member] | Other Operating Segment | EMEA [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									345	355	244
Revenues										1,013	694	712
Claims and other policy benefits	[3]									562	363	428
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									3	(89)	(21)
Interest credited	[3]									30	0	0
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									73	65	61
Insurance, Other [Member] | Other Operating Segment | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest credited										124	106
Insurance, Other [Member] | Other Operating Segment | Asia Pacific [Member] | Accounting Standards Update 2023-07
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	[3]									255	212	161
Revenues										957	749	590
Claims and other policy benefits	[3]									308	230	223
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]									2	(2)	7
Interest credited	[3]									256	203	119
Interest expense	[3]									0	0	0
Other operating expenses	[3],[4]									$ 136	$ 106	$ 80

[1] Includes market valuation adjustments on surrender charges, pension risk transfer initial loss and other immaterial items.

[2] Includes market valuation adjustments on surrender charges and other immaterial items.

[3] The significant expense categories and amounts align with the segment level information that is regularly provided to the CEO. Intersegment expenses are included within the amounts above.

[4] Includes policy acquisition costs and other insurance expenses and other operating expenses.