Financing Receivables - Credit Quality - Commercial Mortgage Loans by Region (Details) - Commercial Loans - Commercial mortgage loans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing receivables - credit quality information
Loans	$ 1,832	$ 1,882
East North Central
Financing receivables - credit quality information
Loans	189	201
East South Central
Financing receivables - credit quality information
Loans	52	54
Middle Atlantic
Financing receivables - credit quality information
Loans	112	114
Mountain
Financing receivables - credit quality information
Loans	138	129
New England
Financing receivables - credit quality information
Loans	28	23
Pacific
Financing receivables - credit quality information
Loans	624	638
South Atlantic
Financing receivables - credit quality information
Loans	465	479
West North Central
Financing receivables - credit quality information
Loans	109	120
West South Central
Financing receivables - credit quality information
Loans	$ 115	$ 124
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%	11.00%
Total commercial mortgage loans | Credit concentration risk | East South Central
Financing receivables - credit quality information
Percentage of total	3.00%	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%	7.00%
Total commercial mortgage loans | Credit concentration risk | New England
Financing receivables - credit quality information
Percentage of total	2.00%	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	25.00%	25.00%
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%	7.00%