Deferred Policy Acquisition Costs and Value of Business Acquired - Rollforward (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024
Deferred Policy Acquisition Cost and Value of Businesses Acquired Rollforward [Line Items]
Present Value of Future Insurance Profits, Net	$ 612	$ 637	$ 298
Present Value of Future Insurance Profits, Amortization Expense	(27)	(55)
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net	1,237	1,257
One America
Deferred Policy Acquisition Cost and Value of Businesses Acquired Rollforward [Line Items]
Deferrals of commissions and expenses		390
Deferrals
Deferred Policy Acquisition Cost and Value of Businesses Acquired Rollforward [Line Items]
Deferrals of commissions and expenses	2	4
Retirement
Deferred Policy Acquisition Cost and Value of Businesses Acquired Rollforward [Line Items]
Deferred Policy Acquisition Cost	615	610	$ 600
Deferrals of commissions and expenses	28	56
As of December 31, 2025	(23)	(46)
Retirement \| One America
Deferred Policy Acquisition Cost and Value of Businesses Acquired Rollforward [Line Items]
Deferrals of commissions and expenses	0	3,458
Other Segments
Deferred Policy Acquisition Cost and Value of Businesses Acquired Rollforward [Line Items]
Deferred Policy Acquisition Cost	$ 10	$ 10

Amount of amortization expense (reversal of expense) for deferred policy acquisition costs.

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