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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 391.0 | $ 442.8 | $ 410.9
Charged to Costs and Expenses | (28.1) | (56.5) | (158.4)
Charged to Other Accounts | 10.1 | (2.0) | (12.3)
Deductions | 22.6 | 6.7 | 202.6
Balance at End of Period | 395.6 | 391.0 | 442.8
Trade accounts receivable |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 11.2 | 10.9 | 9.1
Charged to Costs and Expenses | 6.3 | 5.4 | 5.6
Charged to Other Accounts | 0.0 | 0.0 | 0.0
Deductions | (4.6) | (5.1) | (3.8)
Balance at End of Period | 12.9 | 11.2 | 10.9
Deferred income tax asset valuation allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 379.8 | 431.9 | 401.8
Charged to Costs and Expenses | (34.4) | (61.9) | (164.0)
Charged to Other Accounts | 10.1 | (2.0) | (12.3)
Deductions | 27.2 | 11.8 | 206.4
Balance at End of Period | $ 382.7 | $ 379.8 | $ 431.9

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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(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: 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(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in 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(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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