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Supplementary Data Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts (Tables) | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts [Abstract] |
Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable | Valuation and Qualifying Accounts – Allowance for Uncollectible Accounts Receivable
| Years ended December 31,
| 2017 |  | 2016 |  | 2015
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 adjustments | 4.0 |  |  | (3.3 | ) |  | (4.1 | )
Balance at end of period | $ | 42.7 |  |  | $ | 55.7 |  |  | $ | 54.2 |

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- Definition Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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