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Financing Receivables - General Credit Quality Information - Commercial Mortgage Loans Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Commercial Loans | Commercial mortgage loans
Financing Receivables
Loans	$ 1,902	$ 1,832
Commercial Loans | Commercial mortgage loans | Past due
Financing Receivables
Loans	$ 0	$ 0
Total commercial mortgage loans | Credit concentration risk | Risk Level, High
Financing Receivables
Percentage of total, less than	1.00%	1.00%
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans
Financing Receivables
Percentage of total, less than	100.00%	100.00%

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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