Other Revenues and Other Expenses (Other Revenues - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Distribution service
Revenue from Contract with Customer, Including Assessed Tax	$ 50	$ 54	$ 100	$ 115