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Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing receivables - credit quality information
Loans	$ 1,902	$ 1,832
Apartments
Financing receivables - credit quality information
Loans	522	485
Hotel
Financing receivables - credit quality information
Loans	33	13
Industrial
Financing receivables - credit quality information
Loans	362	317
Mixed Use
Financing receivables - credit quality information
Loans	68	64
Office
Financing receivables - credit quality information
Loans	219	241
Retail
Financing receivables - credit quality information
Loans	546	561
Other
Financing receivables - credit quality information
Loans	$ 152	$ 151
Total commercial mortgage loans | Credit concentration risk
Financing receivables - credit quality information
Percentage of total	100.00%	100.00%
Total commercial mortgage loans | Credit concentration risk | Apartments
Financing receivables - credit quality information
Percentage of total	27.00%	26.00%
Total commercial mortgage loans | Credit concentration risk | Hotel
Financing receivables - credit quality information
Percentage of total	2.00%	1.00%
Total commercial mortgage loans | Credit concentration risk | Industrial
Financing receivables - credit quality information
Percentage of total	19.00%	17.00%
Total commercial mortgage loans | Credit concentration risk | Mixed Use
Financing receivables - credit quality information
Percentage of total	4.00%	4.00%
Total commercial mortgage loans | Credit concentration risk | Office
Financing receivables - credit quality information
Percentage of total	11.00%	13.00%
Total commercial mortgage loans | Credit concentration risk | Retail
Financing receivables - credit quality information
Percentage of total	29.00%	31.00%
Total commercial mortgage loans | Credit concentration risk | Other
Financing receivables - credit quality information
Percentage of total	8.00%	8.00%

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