Current Other Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Liabilities, Current [Abstract]
Asset retirement obligations	$ 8	$ 10
Benefit obligations (Note 9)	27	27
Customer rebates	42	53
Derivatives (Note 14)	52	87
Environmental (Note 10)	12	11
Insurance	5	5
Interest	25	29
Legal (Note 16)	15	107
Operating leases	36	36
Restructuring (Note 12)	10	11
Salaries and benefits	98	121
Sales and use tax/foreign withholding tax payable	117	140
Other	42	43
Total	$ 489	$ 680