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Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Schedule of Capital Expenditures, Depreciation and Amortization Expense of Intangible Assets by Reportable Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 84.9 | $ 63.9 | $ 62.9
Depreciation and amortization | 99.2 | 110.0 | 79.8
Vacuum & Analysis [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 36.0 | 34.1 | 40.1
Depreciation and amortization | 20.3 | 16.8 | 20.8
Light & Motion [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 32.1 | 23.0 | 22.8
Depreciation and amortization | 43.2 | 53.9 | $ 59.0
Equipment & Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 16.8 | 6.8 |
Depreciation and amortization | $ 35.7 | $ 39.3 |

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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