v3.20.4

Commitments and Contingencies - Narrative (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($) individual	Dec. 31, 2019 USD ($)
Commitment And Contingencies [Line Items]
Purchase commitments	$ 372,000,000
Accrued potential and current legal fees	17,000,000	$ 44,000,000
Insurance reimbursements	8,000,000	$ 25,000,000
Insurance reimbursement of claims potential maximum exposure	$ 15,000,000
Number of individuals affected by birth defects | individual	18
Environmental remediation costs	$ 87,000,000
Minimum
Commitment And Contingencies [Line Items]
Range of possible loss	0
Maximum
Commitment And Contingencies [Line Items]
Range of possible loss	$ 23,000,000

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Number of birth defect individuals.

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Carrying amount as of the balance sheet date of amounts expected to be recovered under the terms of insurance contracts.

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