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Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Concentrations of credit risk by property type
Loans	$ 1,993	$ 1,902
Apartments
Concentrations of credit risk by property type
Loans	579	522
Hotel
Concentrations of credit risk by property type
Loans	40	33
Industrial
Concentrations of credit risk by property type
Loans	396	362
Mixed use
Concentrations of credit risk by property type
Loans	76	68
Office
Concentrations of credit risk by property type
Loans	195	219
Retail
Concentrations of credit risk by property type
Loans	530	546
Other
Concentrations of credit risk by property type
Loans	$ 177	$ 152
Total commercial mortgage loans | Credit concentration risk
Concentrations of credit risk by property type
Percentage of total	100.00%	100.00%
Total commercial mortgage loans | Credit concentration risk | Apartments
Concentrations of credit risk by property type
Percentage of total	29.00%	27.00%
Total commercial mortgage loans | Credit concentration risk | Hotel
Concentrations of credit risk by property type
Percentage of total	2.00%	2.00%
Total commercial mortgage loans | Credit concentration risk | Industrial
Concentrations of credit risk by property type
Percentage of total	20.00%	19.00%
Total commercial mortgage loans | Credit concentration risk | Mixed use
Concentrations of credit risk by property type
Percentage of total	4.00%	4.00%
Total commercial mortgage loans | Credit concentration risk | Office
Concentrations of credit risk by property type
Percentage of total	10.00%	11.00%
Total commercial mortgage loans | Credit concentration risk | Retail
Concentrations of credit risk by property type
Percentage of total	26.00%	29.00%
Total commercial mortgage loans | Credit concentration risk | Other
Concentrations of credit risk by property type
Percentage of total	9.00%	8.00%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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