RECEIVABLES - Other Receivables (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Other receivables, contracts with customers | $ 96.1 | $ 64.2 |
| Evergy Kansas Central | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Other receivables, contracts with customers | 89.8 | 59.7 |
| Evergy Metro | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Other receivables, contracts with customers | $ 4.3 | $ 2.9 |