Current Other Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Other Liabilities, Current [Abstract]
Asset retirement obligations	$ 12	$ 10
Benefit obligations (Note 9)	27	27
Customer rebates	72	53
Derivatives (Note 14)	9	87
Environmental (Note 10)	14	11
Insurance	6	5
Interest	22	29
Legal (Note 16)	33	107
Operating leases	35	36
Restructuring (Note 12)	8	11
Salaries and benefits	139	121
Sales and use tax/foreign withholding tax payable	110	140
Other	42	43
Total	$ 529	$ 680