Investments (Mortgage Loans - Narrative) (Details) - Mortgage Loans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables purchased from third parties	$ 415	$ 621	$ 1,300	$ 799
Accrued interest receivable	99		99		$ 95
Financing receivable, before allowance for credit losses	21,611		21,611		19,973
COVID-19 Pandemic financing receivables in nonaccrual status	26		26		30
Financing receivables in nonaccrual status with no allowance for credit losses	23		23		0
Financing receivable in nonaccrual status	81		81		59
COVID-19 Pandemic Financial Asset Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses	$ 26		$ 26		$ 30
Minimum | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses by performance status as a percentage of financing receivables, before allowance for credit losses	99.00%		99.00%		99.00%
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables in nonaccrual status, investment income			$ 1	$ 1
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses	$ 4,421		4,421		$ 3,623
Financing receivables in nonaccrual status with no allowance for credit losses	0		0		0
Financing receivable in nonaccrual status	58		58		59
Residential | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses	$ 4,363		$ 4,363		$ 3,564