Insurance (Separate Accounts - Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Schedule Separate Accounts [Line Items]
Separate account assets	$ 179,873	$ 199,970
Funding Agreements and Participating Close Out Contracts Included in Separate Accounts with a Guaranteed Minimum Return or Account Value
Schedule Separate Accounts [Line Items]
Average interest rate credited on separate accounts with a guaranteed minimum return or account value	2.18%	2.55%
Pass Through Separate Accounts
Schedule Separate Accounts [Line Items]
Separate account assets	$ 134,400	$ 149,000
Separate Accounts With Minimum Return Or Account Value
Schedule Separate Accounts [Line Items]
Separate account assets	$ 45,500	$ 51,000