Fair Value Measurements - Gains or Losses Recorded Related to Fair Value Option (Details) - Fair Value Option - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Fair Value, Option, Quantitative Disclosures
Fair value option gain (loss)	$ (16)	$ (240)	$ (248)	$ 538
Other bond securities
Fair Value, Option, Quantitative Disclosures
Fair value option gain (loss)	(8)	10	2	37
Alternative investments
Fair Value, Option, Quantitative Disclosures
Fair value option gain (loss)	(8)	98	(96)	185
Retained investment in Corebridge
Fair Value, Option, Quantitative Disclosures
Fair value option gain (loss)	$ 0	$ (348)	$ (154)	$ 316

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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