Income Taxes - Schedule of Reconciliation Between Actual Income Tax (Benefit) Expense and Statutory U.S. Federal Amount Computed by Applying the Federal Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items]
Consolidated total amount, pre-tax income (loss)	$ 3,879	$ 3,870	$ 2,867
Tax Expense (Benefit)
U.S. federal income tax at statutory rate, tax expense (benefit)	815	813	602
State and local income tax, net of federal income tax effect	14	26	23
Effect of rate different than statutory		110	176
Other		9	150
Tax exempt interest		(8)	(14)
Disposition of subsidiaries		(1)	(143)
Share-based compensation payments excess tax effect		(16)	(21)
Developments related to prior tax years under IRS review		240	(467)
Effect of cross-border tax laws, net of related tax credits:
U.S. income taxes on non-U.S. insurance companies	(59)
Other	28
Tax credits	(20)
Changes in valuation allowances	(300)	(33)	(365)
Nontaxable or nondeductible items	20	13	16
Changes in unrecognized tax benefits - Global	17	17	169
Income tax expense	$ 782	$ 1,170	$ 126
Percent of Pre-Tax Income (Loss)
U.S. federal income tax at statutory rate	21.00%	21.00%	21.00%
State and local income tax, net of federal income tax effect	0.40%	0.70%	0.80%
Effect of rate different than statutory		2.80%	6.10%
Other		0.30%	5.20%
Tax exempt interest		(0.20%)	(0.50%)
Dispositions of subsidiaries		0.00%	(5.00%)
Share-based compensation payments excess tax effect		(0.40%)	(0.70%)
Developments related to prior tax years under IRS review		6.20%	(16.30%)
Effect of cross-border tax laws, net of related tax credits:
U.S. income taxes on non- U.S. insurance companies	(1.50%)
Other	0.70%
Tax credits	(0.50%)
Changes in valuation allowances	(7.70%)	(0.90%)	(12.70%)
Nontaxable or nondeductible items	0.50%	0.30%	0.60%
Changes in unrecognized tax benefits - Global	0.40%	0.40%	5.90%
Consolidated total amounts	20.20%	30.20%	4.40%
United Kingdom
Tax Expense (Benefit)
Effect of rate different than statutory	$ 43
Other	$ 46
Percent of Pre-Tax Income (Loss)
Effect of rate different than statutory	1.10%
Other	1.20%
NETHERLANDS
Tax Expense (Benefit)
Effect of rate different than statutory	$ 41
Other	$ (1)
Percent of Pre-Tax Income (Loss)
Effect of rate different than statutory	1.10%
Other	0.00%
United States
Tax Expense (Benefit)
Other	$ 22
Percent of Pre-Tax Income (Loss)
Other	0.50%
Other jurisdictions
Tax Expense (Benefit)
Effect of rate different than statutory	$ 116
Percent of Pre-Tax Income (Loss)
Effect of rate different than statutory	3.00%