Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Project	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items]
Environmental remediation reserve balance, current	$ 46		$ 46		$ 39
Liabilities incurred		$ 1	2	$ 2	73
Payments related to remediation expenses applied against the reserve	6	$ 7	9	$ 10	17
Decrease in reserves due to effects of foreign currency translation			6
Active or future remediation for significant sites	263		263		274
Accrued environmental reserves	323		$ 323		335	$ 280
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			12 years
Other Sites [Member]
Loss Contingencies [Line Items]
Number of remediation projects | Project			35
Accrued environmental reserves	$ 60		$ 60		$ 61