Schedule II, Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Millions |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Movement in Valuation Allowances and Reserves [Roll Forward] | ||||||||
| Beginning balance | [1] | $ 81.9 | $ 76.8 | $ 71.4 | ||||
| Charged to Costs & Expenses | 37.7 | 31.0 | 31.6 | |||||
| Impact of Currency | 1.0 | (0.7) | (0.9) | |||||
| Charged to Other Accounts | [2] | 2.1 | 0.1 | 0.0 | ||||
| Write Offs, Write Downs & Deductions | (55.3) | (25.3) | (25.3) | |||||
| Ending balance | [1] | $ 67.4 | $ 81.9 | $ 76.8 | ||||
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