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Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | $ 55.7 | $ 54.2 | $ 59.5
Charges to costs and expenses | 9.5 | 16.7 | 11.4
Deductions: |  |  |
Dispositions | (1.0) | (2.5) | (2.8)
Uncollectible accounts written off | (25.5) | (9.4) | (9.8)
Foreign currency translation adjustment | 4.0 | (3.3) | (4.1)
Balance at end of period | $ 42.7 | $ 55.7 | $ 54.2

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- Definition Allowance for doubtful accounts, Deductions for dispositions + References No definition available. + Details
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- Definition Allowance for doubtful accounts, Deductions for uncollectible accounts written off + References No definition available. + Details
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- Definition Allowance for doubtful accounts, Foreign currency translation adjustment + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=26873400&loc=d3e24092-122690 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=26873400&loc=d3e24092-122690 + Details
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