Insurance (Guarantees Related to Universal and Variable Life Contracts) (Details) - Secondary Guarantees - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Universal Life Contracts
Net Amount at Risk by Product and Guarantee [Line Items]
Total account value (3)	$ 5,317	$ 5,518
Net amount at risk	$ 65,935	$ 67,248
Average attained age of policyholders	69 years	68 years
Variable Life Contracts
Net Amount at Risk by Product and Guarantee [Line Items]
Total account value (3)	$ 1,103	$ 1,448
Net amount at risk	$ 10,366	$ 10,508
Average attained age of policyholders	48 years	47 years