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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of period |  | $ 21.4 | $ 19.1 | $ 20.7
Charged to costs and expenses |  | (2.3) | 2.3 | (1.3)
Deductions | [1] | (1.1) | 0.0 | (0.3)
Balance at end of period |  | 18.0 | 21.4 | 19.1
Deferred Tax Asset Valuation Allowance [Member] |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of period |  | 20.9 | 18.7 | 20.1
Charged to costs and expenses |  | (3.0) | 2.5 | (1.3)
Deductions | [1] | (1.9) | (0.3) | (0.1)
Balance at end of period |  | 16.0 | 20.9 | 18.7
Allowance for Doubtful Accounts Receivable [Member] |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of period |  | 0.5 | 0.4 | 0.6
Charged to costs and expenses |  | 0.7 | (0.2) | 0.0
Deductions | [1] | 0.8 | 0.3 | (0.2)
Balance at end of period |  | $ 2.0 | $ 0.5 | $ 0.4
[1] | Includes accounts receivable written off, the write-off or write-down of valuation allowances, and translation adjustments.

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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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