Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Project	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Environmental remediation reserve balance, current	$ 36		$ 36		$ 29
Liabilities incurred			4	$ 2	7
Payments related to remediation expenses applied against the reserve	6	$ 6	11	9	19
Reversals of previously recorded liabilities	10		17
Decrease in reserves due to effects of foreign currency translation				$ 6
Active or future remediation for significant sites	241		241		259
Accrued environmental reserves	298		$ 298		322	$ 335
Massena, New York [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Environmental remediation work completion period			4 years
Massena, New York [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Environmental remediation work completion period			8 years
Sherwin, Texas [Member]
Loss Contingencies [Line Items]
Beginning of expected term for reuse of residue bed			8 years
Ending of expected term for reuse of residue bed			10 years
Other Sites [Member]
Loss Contingencies [Line Items]
Number of remediation projects | Project			35
Accrued environmental reserves	57		$ 57		$ 63
Closed Suriname Site [Member]
Loss Contingencies [Line Items]
Reversals of previously recorded liabilities	5		5
Closed Site in Brazil [Member]
Loss Contingencies [Line Items]
Reversals of previously recorded liabilities	$ 5		5
Closed Tennessee Site [Member]
Loss Contingencies [Line Items]
Reversals of previously recorded liabilities			$ 7