Investments (Mortgage Loans - Narrative) (Details) - Mortgage Loans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables purchased from third parties	$ 387	$ 698	$ 1,600	$ 1,500
Accrued interest receivable	102		102		$ 95
Financing receivable, before allowance for credit losses	22,129		22,129		19,910
COVID-19 Pandemic financing receivables in nonaccrual status	23		23		30
Financing receivable in nonaccrual status	62		62		59
Financing receivables in nonaccrual status with no allowance for credit losses	2		2		0
Financing receivables in nonaccrual status, investment income			1
COVID-19 Pandemic Financial Asset Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses	$ 23		$ 23		$ 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
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses	$ 4,686		$ 4,686		$ 3,623
Financing receivable in nonaccrual status	59		59		59
Financing receivables in nonaccrual status with no allowance for credit losses	0		0		0
Residential | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit losses	$ 4,627		$ 4,627		$ 3,564