Other Revenues and Other Expenses (Other Revenues - Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Distribution service
Revenue from Contract with Customer, Including Assessed Tax	$ 50	$ 53	$ 150	$ 168