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Commitments and Contingencies - Activity Related to Asbestos Claims (Detail) - Asbestos Related Matters [Member] - Claim Claim in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Number of Pending Claims [Roll Forward] |  |  |
Pending claims - Beginning | 24 | 24 | 26
New claims | 4 | 4 | 4
Settlements | (1) | (1) | (1)
Dismissals | (2) | (3) | (5)
Pending claims - Ending | 25 | 24 | 24

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- Definition Number of claims dismissed. + References No definition available. + Details
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- Details
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