Investments (Past Due and Interest Accrual Status of Mortgage Loans) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	$ 82,408	$ 79,860
Greater than 90 Days Past Due and Still Accruing Interest	46	37
Financing Receivable, Nonaccrual	822	822
Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	572	587
Commercial Mortgage Loans
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	52,348	50,553
Greater than 90 Days Past Due and Still Accruing Interest	5	13
Financing Receivable, Nonaccrual	180	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	11,497	11,196
Greater than 90 Days Past Due and Still Accruing Interest	8	8
Financing Receivable, Nonaccrual	464	442	534
Residential Mortgage Loans | Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	471	450
Agricultural Mortgage Loans
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	18,563	18,111
Greater than 90 Days Past Due and Still Accruing Interest	33	16
Financing Receivable, Nonaccrual	178	225	$ 266
Agricultural Mortgage Loans | Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Mortgage Loans, Gross	$ 96	$ 124