For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Concentrations of credit risk by property type
Less: allowance for loan losses	$ 59	$ 59	$ 48	$ 50
Commercial Loans
Concentrations of credit risk by property type
Less: allowance for loan losses	52	54	$ 45	$ 47
Commercial Loans \| Commercial mortgage loans
Concentrations of credit risk by property type
Loans	1,861	1,882
Less: allowance for loan losses	11	11
Total loans	1,850	1,871
Commercial Loans \| Commercial mortgage loans \| Apartments
Concentrations of credit risk by property type
Loans	489	495
Commercial Loans \| Commercial mortgage loans \| Hotel
Concentrations of credit risk by property type
Loans	14	14
Commercial Loans \| Commercial mortgage loans \| Industrial
Concentrations of credit risk by property type
Loans	310	321
Commercial Loans \| Commercial mortgage loans \| Mixed use
Concentrations of credit risk by property type
Loans	68	66
Commercial Loans \| Commercial mortgage loans \| Office
Concentrations of credit risk by property type
Loans	256	259
Commercial Loans \| Commercial mortgage loans \| Retail
Concentrations of credit risk by property type
Loans	581	594
Commercial Loans \| Commercial mortgage loans \| Other
Concentrations of credit risk by property type
Loans	$ 143	$ 133
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans
Concentrations of credit risk by property type
Percentage of total	100.00%	100.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Apartments
Concentrations of credit risk by property type
Percentage of total	26.00%	26.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Hotel
Concentrations of credit risk by property type
Percentage of total	1.00%	1.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Industrial
Concentrations of credit risk by property type
Percentage of total	17.00%	17.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Mixed use
Concentrations of credit risk by property type
Percentage of total	3.00%	4.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Office
Concentrations of credit risk by property type
Percentage of total	14.00%	14.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Retail
Concentrations of credit risk by property type
Percentage of total	31.00%	31.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Other
Concentrations of credit risk by property type
Percentage of total	8.00%	7.00%