Current Other Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Liabilities, Current [Abstract]
Asset retirement obligations	$ 5	$ 6
Benefit obligations (Note 9)	28	28
Customer rebates	44	63
Derivatives (Note 14)	101	8
Environmental (Note 10)	14	12
Insurance	5	6
Interest	28	29
Legal (Note 16)	105	105
Operating leases	31	29
Restructuring (Note 12)	13	13
Salaries and benefits	103	89
Sales and use tax/foreign withholding tax payable	116	35
Other	39	38
Total	$ 632	$ 461