Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Net Investment Income [Line Items]
Effective tax rate	47.10%	14.40%	19.30%	13.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
Accumulated other comprehensive income (loss)	$ (1,952)	$ (2,067)	$ (1,952)	$ (2,067)	$ (1,788)
Fixed maturities
Net Investment Income [Line Items]
Accumulated other comprehensive income (loss)	$ (1,900)		$ (1,900)

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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+ Details