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Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Allowance for uncollectible accounts |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance At Beginning Of Period | $ 10.5 | $ 9.2 | $ 6.7
Additions Charged To Costs And Expenses | 24.9 | 27.2 | 20.7
Additions Charged To Other Accounts | 12.5 | 12.4 | 16.9
Deductions | 28.6 | 38.3 | 35.1
Balance At End Of Period | 19.3 | 10.5 | 9.2
Allowance for uncollectible accounts | Evergy Kansas Central |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance At Beginning Of Period | 3.8 | 3.9 | 6.7
Additions Charged To Costs And Expenses | 11.1 | 7.2 | 9.0
Additions Charged To Other Accounts | 2.6 | 3.4 | 7.4
Deductions | 10.0 | 10.7 | 19.2
Balance At End Of Period | 7.5 | 3.8 | 3.9
Allowance for uncollectible accounts | Evergy Metro |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance At Beginning Of Period | 4.6 | 3.8 | 2.2
Additions Charged To Costs And Expenses | 9.0 | 13.7 | 13.1
Additions Charged To Other Accounts | 6.9 | 6.3 | 4.4
Deductions | 12.4 | 19.2 | 15.9
Balance At End Of Period | 8.1 | 4.6 | 3.8
Tax valuation allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance At Beginning Of Period | 17.5 | 27.3 | 0.0
Additions Charged To Costs And Expenses | 0.0 | 0.6 | 2.2
Additions Charged To Other Accounts | 0.0 | 0.0 | 26.8
Deductions | 3.1 | 10.4 | 1.7
Balance At End Of Period | 14.4 | 17.5 | 27.3
Tax valuation allowance | Evergy Kansas Central |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance At Beginning Of Period | $ 0.0 | 1.7 | 0.0
Additions Charged To Costs And Expenses |  | 0.0 | 1.7
Additions Charged To Other Accounts |  | 0.0 | 0.0
Deductions |  | 1.7 | 0.0
Balance At End Of Period |  | $ 0.0 | $ 1.7

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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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