Financing Receivables - Credit Quality - Commercial Mortgage Loans by Region (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Financing receivables - credit quality information
Loans	$ 1,756	$ 1,735
East North Central
Financing receivables - credit quality information
Loans	180	180
East South Central
Financing receivables - credit quality information
Loans	41	47
Middle Atlantic
Financing receivables - credit quality information
Loans	102	97
Mountain
Financing receivables - credit quality information
Loans	138	130
New England
Financing receivables - credit quality information
Loans	20	21
Pacific
Financing receivables - credit quality information
Loans	595	595
South Atlantic
Financing receivables - credit quality information
Loans	459	452
West North Central
Financing receivables - credit quality information
Loans	113	105
West South Central
Financing receivables - credit quality information
Loans	$ 108	$ 108
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%	3.00%
Total commercial mortgage loans \| Credit concentration risk \| Middle Atlantic
Financing receivables - credit quality information
Percentage of total	6.00%	6.00%
Total commercial mortgage loans \| Credit concentration risk \| Mountain
Financing receivables - credit quality information
Percentage of total	8.00%	8.00%
Total commercial mortgage loans \| Credit concentration risk \| New England
Financing receivables - credit quality information
Percentage of total	1.00%	1.00%
Total commercial mortgage loans \| Credit concentration risk \| Pacific
Financing receivables - credit quality information
Percentage of total	34.00%	34.00%
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	7.00%	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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