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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for doubtful accounts |  |  |
Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | $ 44.8 | $ 33.6 | $ 33.5
Charged to cost and expenses | 1.5 | 8.5 | 1.2
Additions (Deductions) | (2.8) | 2.7 | (1.1)
Balance at end of period | 43.5 | 44.8 | 33.6
Valuation allowance on deferred tax assets |  |  |
Valuation and Qualifying Accounts |  |  |
Balance at beginning of period | 40.1 | 35.2 | 34.7
Charged to cost and expenses | 6.3 | 3.8 | 0.2
Additions (Deductions) | (1.5) | 1.1 | 0.3
Balance at end of period | $ 44.9 | $ 40.1 | $ 35.2

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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=120395691&loc=d3e24092-122690 + Details
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