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Revenue - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Deferred Revenue And Customer Advances | $ 91.0 | $ 65.6 | $ 69.9
Revenue, Remaining Performance Obligation, Amount | $ 929.6 |  |
Short-term Contract with Customer [Member] |  |  |
Revenue, Remaining Performance Obligation, Percentage | 92.00% |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Period | 12 months |  |
Long-term Contract with Customer [Member] |  |  |
Revenue, Remaining Performance Obligation, Percentage | 8.00% |  |
Long-term Contract with Customer [Member] | Maximum [Member] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Period | 3 years |  |
Long-term Contract with Customer [Member] | Minimum [Member] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Period | 1 year |  |

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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 + Details
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
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- Definition Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
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- Details
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- Details
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- Details
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- Details
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