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Financing Receivables - Credit Quality - Commercial Mortgage Loans by Region (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Financing receivables - credit quality information
Loans	$ 1,944	$ 1,902
East North Central
Financing receivables - credit quality information
Loans	189	185
East South Central
Financing receivables - credit quality information
Loans	45	45
Middle Atlantic
Financing receivables - credit quality information
Loans	133	133
Mountain
Financing receivables - credit quality information
Loans	168	157
New England
Financing receivables - credit quality information
Loans	29	30
Pacific
Financing receivables - credit quality information
Loans	642	633
South Atlantic
Financing receivables - credit quality information
Loans	501	489
West North Central
Financing receivables - credit quality information
Loans	117	119
West South Central
Financing receivables - credit quality information
Loans	$ 120	$ 111
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 | East North Central
Financing receivables - credit quality information
Percentage of total	10.00%	10.00%
Total commercial mortgage loans | Credit concentration risk | East South Central
Financing receivables - credit quality information
Percentage of total	2.00%	2.00%
Total commercial mortgage loans | Credit concentration risk | Middle Atlantic
Financing receivables - credit quality information
Percentage of total	7.00%	7.00%
Total commercial mortgage loans | Credit concentration risk | Mountain
Financing receivables - credit quality information
Percentage of total	9.00%	8.00%
Total commercial mortgage loans | Credit concentration risk | New England
Financing receivables - credit quality information
Percentage of total	1.00%	2.00%
Total commercial mortgage loans | Credit concentration risk | Pacific
Financing receivables - credit quality information
Percentage of total	33.00%	33.00%
Total commercial mortgage loans | Credit concentration risk | South Atlantic
Financing receivables - credit quality information
Percentage of total	26.00%	26.00%
Total commercial mortgage loans | Credit concentration risk | West North Central
Financing receivables - credit quality information
Percentage of total	6.00%	6.00%
Total commercial mortgage loans | Credit concentration risk | West South Central
Financing receivables - credit quality information
Percentage of total	6.00%	6.00%

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