A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Amount, excluding accrued interest, of credit loss expense on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with no credit loss previously recorded.

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from sale.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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- Definition

Amount of decrease in financing receivable from sale and reclassification to held-for-sale. Excludes net investment in lease.

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- Definition

Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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Investments - Allowance for credit losses (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2025	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		$ 39	$ 30	$ 14
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded	$ 18	29
Reductions for securities sold during the period	(2)	(20)
Residential mortgage-backed
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		0	0
Commercial mortgage-backed
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		0	17	9
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded	8	0
Reductions for securities sold during the period	0	(17)
Foreign corporate public securities and foreign governments
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		1	1	3
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded	0	0
Reductions for securities sold during the period	(2)	0
Foreign corporate private securities
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		36	8	1
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded	7	28
Reductions for securities sold during the period	0	0
U.S. corporate private securities
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		1	3
Financing Receivable, Allowance for Credit Loss		1	3	0
Credit losses on securities for which credit losses were not previously recorded	3	1
Reductions for securities sold during the period	0	(3)
U.S. corporate public securities
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		0	0
Other Asset-backed Securities [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		1	1	$ 1
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded
Reductions for securities sold during the period	$ 0	0
Fixed maturities
Allowance for Loan and Lease Losses [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest		$ 39	$ 30