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	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Concentrations of credit risk by property type
Less: allowance for loan losses	$ 52	$ 50	$ 53	$ 68
Commercial Loans
Concentrations of credit risk by property type
Less: allowance for loan losses	49	47	$ 50	$ 66
Commercial Loans \| Commercial mortgage loans
Concentrations of credit risk by property type
Loans	1,938	1,916
Less: allowance for loan losses	12	12
Total loans	1,926	1,904
Commercial Loans \| Commercial mortgage loans \| Apartments
Concentrations of credit risk by property type
Loans	517	496
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	319	319
Commercial Loans \| Commercial mortgage loans \| Mixed use
Concentrations of credit risk by property type
Loans	67	68
Commercial Loans \| Commercial mortgage loans \| Office
Concentrations of credit risk by property type
Loans	268	271
Commercial Loans \| Commercial mortgage loans \| Retail
Concentrations of credit risk by property type
Loans	619	617
Commercial Loans \| Commercial mortgage loans \| Other
Concentrations of credit risk by property type
Loans	$ 134	$ 131
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	27.00%	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	16.00%	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%	3.00%
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	32.00%	32.00%
Total commercial mortgage loans \| Credit concentration risk \| Commercial Loans \| Commercial mortgage loans \| Other
Concentrations of credit risk by property type
Percentage of total	7.00%	7.00%