Basis of Presentation (Schedule of Cash Activity) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 581	$ 534	$ 886
Program cash	139	89	55
Restricted cash	1		4
Total cash and cash equivalents, program and restricted cash	$ 721	$ 626	$ 945	$ 765