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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 | $ 410.9 | $ 315.1 | $ 230.4
Charged to Costs and Expenses | (158.4) | (1.1) | (231.5)
Charged to Other Accounts | (12.3) | 8.1 | 23.8
Deductions | 202.6 | 88.8 | 292.4
Balance at End of Period | 442.8 | 410.9 | 315.1
Trade accounts receivable |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 9.1 | 7.8 | 7.5
Charged to Costs and Expenses | 5.6 | 5.0 | 2.2
Charged to Other Accounts | 0.0 | 0.0 | 0.0
Deductions | (3.8) | (3.7) | (1.9)
Balance at End of Period | 10.9 | 9.1 | 7.8
Deferred income tax asset valuation allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 401.8 | 307.3 | 222.9
Charged to Costs and Expenses | (164.0) | (6.1) | (233.7)
Charged to Other Accounts | (12.3) | 8.1 | 23.8
Deductions | 206.4 | 92.5 | 294.3
Balance at End of Period | $ 431.9 | $ 401.8 | $ 307.3

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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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