Environmental (Schedule of Environmental Remediation Reserves) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Environmental Remediation Obligations [Abstract]
Demerger obligations (Note 14)	$ 17	$ 20
Divestiture obligations (Note 14)	13	14
Active sites	19	21
U.S. Superfund sites	8	10
Other environmental remediation liabilities	2	2
Total	$ 59	$ 67