Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Allowance for doubtful accounts | |||
| Balance December 31, 2016 | $ 12.4 | $ 7.8 | $ 4.3 |
| Provision for doubtful accounts | 5.3 | 9.5 | 7.8 |
| Write-off and adjustments | (7.0) | (5.6) | (4.5) |
| Recoveries | 0.7 | 0.7 | 0.2 |
| Balance December 31, 2017 | $ 11.4 | $ 12.4 | $ 7.8 |
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- Definition Total of the write-offs and adjustments in a given period to allowances and reserves for doubtful accounts No definition available.
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from recoveries of amounts previously written off or reestablishment of reserves that had previously been utilized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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