Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Income Tax Contingency [Line Items]
Effective income tax rate	0.80%	1.80%	9.80%	2.90%	117.00%
Income tax expense	$ 5	$ 4	$ 25	$ 5
Unrealized Tax Losses, Available-For-Sale Securities
Income Tax Contingency [Line Items]
Increase (decrease) to valuation allowance	(20)		107
Tax expense (benefit) recorded to other comprehensive income	(22)		105
Income tax expense	2		2
Deferred tax assets valuation allowance	$ 593		$ 593		$ 486

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details

- Definition

Amount of tax expense (benefit) allocated to other comprehensive income (loss).

+ References

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+ Details