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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash paid for (received from): |  |  |
Interest, net of amount capitalized | $ 500.9 | $ 393.7 | $ 356.9
Income taxes, net of refunds | 34.4 | 21.6 | (19.6)
Non-cash investing transactions: |  |  |
Property, plant and equipment additions (reductions) | 251.3 | 354.7 | 269.3
Variable Interest Entities |  |  |
Cash paid for (received from): |  |  |
Interest of VIEs | 0.0 | 0.0 | 0.2
Evergy Kansas Central |  |  |
Cash paid for (received from): |  |  |
Interest, net of amount capitalized | 195.3 | 170.2 | 149.3
Income taxes, net of refunds | 54.4 | 79.8 | 37.5
Non-cash investing transactions: |  |  |
Property, plant and equipment additions (reductions) | 134.1 | 203.9 | 101.9
Evergy Kansas Central | Variable Interest Entities |  |  |
Cash paid for (received from): |  |  |
Interest of VIEs | 0.0 | 0.0 | 0.2
Evergy Metro |  |  |
Cash paid for (received from): |  |  |
Interest, net of amount capitalized | 134.3 | 114.6 | 110.8
Income taxes, net of refunds | 9.8 | (15.2) | 36.6
Non-cash investing transactions: |  |  |
Property, plant and equipment additions (reductions) | $ 83.2 | $ 125.8 | $ 102.2

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-2 + Details
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