Other Revenues and Other Expenses (Other Revenues - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Distribution service
Revenue from Contract with Customer, Including Assessed Tax	$ 74	$ 91	$ 156	$ 179