Segment Information (Income Loss Before Provision for Income Tax of Reportable Segments) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025		Jun. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		$ 341	$ 269	$ 710		$ 541
Revenues		5,599	4,878	10,859		11,215
Investment Income, Investment Expense		57	49	109		88
Other revenues		84	147	172		296
Claims and other policy benefits		4,045	3,712	7,867		8,844
Liability for Future Policy Benefit, Remeasurement Gain (Loss)		(68)	90	(12)		114
Interest credited		314	231	613		485
Interest expense		90	72	170		140
Other operating expenses		325	301	625		584
Market Risk Benefit, Change in Fair Value, Gain (Loss)		17	8	(12)		43
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 Income Taxes, Noncontrolling Interest		421	491	906		1,007
Revenues		5,678	5,119	11,018		11,590
Gain (Loss), Investment and Derivative, Operating, before Tax		(77)	(308)	(148)		(540)
Embedded Derivative, Gain on Embedded Derivative		3	26	(8)		103
Investment Income, Investment Expense		2	0	2		2
Other Nonoperating Expense		0	(1)	(18)	[1]	(2)
Other revenues	[2]	(7)	42	(5)		62
Other Non Operating Reconciling Items	[1]	(23)	(45)			(68)
Unrecognized Tax Benefits, Period Increase (Decrease)		0	1			1
Other Nonoperating Income		0	1	710		2
Embedded Derivative, Loss on Embedded Derivative		(2)	6	(12)		(7)
Market Risk Benefit, Change in Fair Value, Gain (Loss)		17	8	(12)		43
Corporate and Other [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 Income Taxes, Noncontrolling Interest		(32)	(44)	(102)		(82)
Revenues		187	133	324		255
Claims and other policy benefits	[3]	0	0	0		0
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	0	0	0		0
Interest credited	[3]	45	35	92		65
Interest expense	[3]	90	1	170		139
Other operating expenses	[3],[4]	84	141	164		133
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest credited				80		34
Life Insurance Product Line [Member] | Other Segments | 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 Income Taxes, Noncontrolling Interest		4	167	144		295
Revenues		2,320	2,037	4,511		3,963
Claims and other policy benefits	[3]	1,922	1,676	3,695		3,248
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	74	(66)	49		(87)
Interest credited	[3]	37	19	66		38
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	283	241	557		469
Life Insurance Product Line [Member] | Other Segments | 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 Income Taxes, Noncontrolling Interest		28	26	60		72
Revenues		406	390	790		775
Claims and other policy benefits	[3]	318	304	613		587
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	2	1	5		(2)
Interest credited	[3]	0	0	0		0
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	58	59	112		118
Life Insurance Product Line [Member] | Other Segments | 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 Income Taxes, Noncontrolling Interest		18	(1)	68		37
Revenues		608	524	1,180		1,049
Claims and other policy benefits	[3]	533	464	1,016		888
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	6	6	(2)		1
Interest credited	[3]	0	0	0		0
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	51	55	98		123
Life Insurance Product Line [Member] | Other Segments | 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 Income Taxes, Noncontrolling Interest		104	99	210		208
Revenues		889	778	1,739		1,569
Claims and other policy benefits	[3]	701	607	1,372		1,193
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	(8)	(29)	(26)		(28)
Interest credited	[3]	0	0	0		0
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	92	101	183		196
Insurance, Other | Other Segments | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest credited				293		289
Insurance, Other | Other Segments | 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 Income Taxes, Noncontrolling Interest		97	80	164		170
Revenues		419	677	915		2,958
Claims and other policy benefits	[3]	76	367	276		2,323
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	(1)	(3)	(3)		(1)
Interest credited	[3]	130	126	253		261
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	117	107	225		205
Insurance, Other | Other Segments | 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 Income Taxes, Noncontrolling Interest		9	7	20		14
Revenues		108	102	215		129
Claims and other policy benefits	[3]	93	89	184		108
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	0	0	0		0
Interest credited	[3]	0	0	0		0
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	6	6	11		7
Insurance, Other | Other Segments | 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 Income Taxes, Noncontrolling Interest		116	86	206		163
Revenues		367	247	649		472
Claims and other policy benefits	[3]	224	133	391		255
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	(3)	2	(6)		4
Interest credited	[3]	7	9	13		16
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	23	17	45		34
Insurance, Other | Other Segments | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Interest credited				92		52
Insurance, Other | Other Segments | 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 Income Taxes, Noncontrolling Interest		77	71	136		130
Revenues		374	231	695		420
Claims and other policy benefits	[3]	158	74	303		121
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	[3]	(2)	(1)	(5)		(1)
Interest credited	[3]	93	49	177		100
Interest expense	[3]	0	0	0		0
Other operating expenses	[3],[4]	$ 48	$ 38	$ 84		$ 70

[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.