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Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for doubtful accounts receivable |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 5.3 | $ 9.3 | $ 9.5
Additions Charged to Costs and Expenses | 1.3 | 1.3 | 0.7
Reductions | (0.2) | 0.0 | 0.0
Other Changes Add (Deduct) | (0.8) | (5.3) | (0.9)
Balance at End of Period | 5.6 | 5.3 | 9.3
Allowance for obsolete inventory |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 67.7 | 56.7 | 48.3
Additions Charged to Costs and Expenses | 30.1 | 27.5 | 21.9
Reductions | 2.4 |  |
Additions Through Acquisition |  | 0.0 | 0.5
Other Changes Add (Deduct) | (14.1) | (16.5) | (14.0)
Balance at End of Period | 81.3 | 67.7 | 56.7
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 16.1 | 14.6 | 10.4
Additions Charged to Costs and Expenses | 2.1 | 3.3 | 4.3
Reductions | (1.2) | (1.8) | (0.1)
Balance at End of Period | $ 17.0 | $ 16.1 | $ 14.6

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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