Investments (Past Due and Interest Accrual Status of Mortgage Loans) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	$ 82,904	$ 79,860
Greater than 90 Days Past Due and Still Accruing Interest	46	37
Financing Receivable, Nonaccrual	836	822
Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	607	587
Commercial Mortgage Loans
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	52,273	50,553
Greater than 90 Days Past Due and Still Accruing Interest	5	13
Financing Receivable, Nonaccrual	151	155	$ 317
Commercial Mortgage Loans | Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	5	13
Residential Mortgage Loans
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	11,708	11,196
Greater than 90 Days Past Due and Still Accruing Interest	10	8
Financing Receivable, Nonaccrual	478	442	534
Residential Mortgage Loans | Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	484	450
Agricultural Mortgage Loans
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	18,923	18,111
Greater than 90 Days Past Due and Still Accruing Interest	31	16
Financing Receivable, Nonaccrual	207	225	$ 266
Agricultural Mortgage Loans | Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	$ 118	$ 124