Deferred Policy Acquisition Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	$ 5,823	$ 4,720	$ 5,823	$ 4,720	$ 5,543
Deferred Policy Acquisition Costs, Amortization Expense	(433)	(391)	(850)	(778)
Corporate and Other [Member]
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	16	15	16	15
Life Insurance Product Line [Member] | Americas [Member] | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	3,025	2,269	3,025	2,269	2,986	$ 2,191
Deferred Policy Acquisition Cost, Capitalization			151	156
Deferred Policy Acquisition Costs, Amortization Expense			(113)	(78)
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			1	0
Life Insurance Product Line [Member] | CANADA | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	167	166	167	166	157	173
Deferred Policy Acquisition Cost, Capitalization			7	4
Deferred Policy Acquisition Costs, Amortization Expense			(6)	(6)
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			9	(5)
Life Insurance Product Line [Member] | EMEA [Member] | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	443	354	443	354	354	347
Deferred Policy Acquisition Cost, Capitalization			74	35
Deferred Policy Acquisition Costs, Amortization Expense			(27)	(23)
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			42	(5)
Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	1,264	1,128	1,264	1,128	1,178	1,098
Deferred Policy Acquisition Cost, Capitalization			89	80
Deferred Policy Acquisition Costs, Amortization Expense			(33)	(29)
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			30	(21)
Insurance, Other | Americas [Member] | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	512	523	512	523	506	552
Deferred Policy Acquisition Cost, Capitalization			38	1
Deferred Policy Acquisition Costs, Amortization Expense			(32)	(30)
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			0	0
Insurance, Other | CANADA | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	21	0	21	0	20	0
Deferred Policy Acquisition Cost, Capitalization			0	0
Deferred Policy Acquisition Costs, Amortization Expense			0	0
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			1	0
Insurance, Other | EMEA [Member] | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	0	0	0	0	0	0
Deferred Policy Acquisition Cost, Capitalization			0	0
Deferred Policy Acquisition Costs, Amortization Expense			0	0
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			0	0
Insurance, Other | Asia Pacific [Member] | Other Segments
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	$ 375	$ 265	375	265	$ 324	$ 250
Deferred Policy Acquisition Cost, Capitalization			76	48
Deferred Policy Acquisition Costs, Amortization Expense			(27)	(32)
Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss)			$ 2	$ (1)