Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (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
Apartments
Financing receivables - credit quality information
Loans	485	495
Hotel
Financing receivables - credit quality information
Loans	13	14
Industrial
Financing receivables - credit quality information
Loans	317	321
Mixed Use
Financing receivables - credit quality information
Loans	64	66
Office
Financing receivables - credit quality information
Loans	241	259
Retail
Financing receivables - credit quality information
Loans	561	594
Other
Financing receivables - credit quality information
Loans	$ 151	$ 133
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	26.00%	26.00%
Total commercial mortgage loans | Credit concentration risk | Hotel
Financing receivables - credit quality information
Percentage of total	1.00%	1.00%
Total commercial mortgage loans | Credit concentration risk | Industrial
Financing receivables - credit quality information
Percentage of total	17.00%	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	13.00%	14.00%
Total commercial mortgage loans | Credit concentration risk | Retail
Financing receivables - credit quality information
Percentage of total	31.00%	31.00%
Total commercial mortgage loans | Credit concentration risk | Other
Financing receivables - credit quality information
Percentage of total	8.00%	7.00%