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FAIR VALUE MEASUREMENTS - Recurring (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Assets |  |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets, Other | Other assets, Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other, Other | Other, Other
Fair Value, Measurements, Recurring |  |
Assets |  |
Total nuclear decommissioning trust | $ 766.4 | $ 653.3
Total rabbi trust | 33.3 | 34.1
Derivative Asset | 42.7 | 50.3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (90.3) | (279.5)
Total self-insured health plan trust | 15.7 | 11.2
Total Assets | 858.1 | 748.9
Derivative Liability | 45.4 | 52.5
FIN 39 Derivative liability netting | (83.4) | (270.4)
Total Liabilities | 45.4 | 52.5
Fair Value, Measurements, Recurring | Level 1 |  |
Assets |  |
Total nuclear decommissioning trust | 653.7 | 547.1
Total rabbi trust | 33.3 | 34.1
Derivative Asset, Fair Value, Gross Asset | 89.0 | 268.0
Total self-insured health plan trust | 8.8 | 5.7
Total Assets | 784.8 | 854.9
Derivative Liability, Fair Value, Gross Liability | 82.0 | 250.8
Total Liabilities | 82.0 | 250.8
Fair Value, Measurements, Recurring | Level 2 |  |
Assets |  |
Total nuclear decommissioning trust | 47.8 | 43.4
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 33.6 | 46.6
Total self-insured health plan trust | 6.9 | 5.5
Total Assets | 88.3 | 95.5
Derivative Liability, Fair Value, Gross Liability | 36.9 | 59.7
Total Liabilities | 36.9 | 59.7
Fair Value, Measurements, Recurring | Level 3 |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 10.4 | 15.2
Total self-insured health plan trust | 0.0 | 0.0
Total Assets | 10.4 | 15.2
Derivative Liability, Fair Value, Gross Liability | 9.9 | 12.4
Total Liabilities | 9.9 | 12.4
Fair Value, Measurements, Recurring | NAV |  |
Assets |  |
Total nuclear decommissioning trust | 64.9 | 62.8
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total self-insured health plan trust | 0.0 | 0.0
Total Assets | 64.9 | 62.8
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Total Liabilities | 0.0 | 0.0
Fair Value, Measurements, Recurring | Power commodity contract |  |
Assets |  |
Derivative Asset | 42.0 | 43.0
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (16.9) | (64.2)
Derivative Liability | 43.9 | 47.4
FIN 39 Derivative liability netting | (10.0) | (55.1)
Fair Value, Measurements, Recurring | Power commodity contract | Level 1 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 16.3 | 45.5
Derivative Liability, Fair Value, Gross Liability | 9.4 | 34.2
Fair Value, Measurements, Recurring | Power commodity contract | Level 2 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 32.2 | 46.5
Derivative Liability, Fair Value, Gross Liability | 34.6 | 55.9
Fair Value, Measurements, Recurring | Power commodity contract | Level 3 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 10.4 | 15.2
Derivative Liability, Fair Value, Gross Liability | 9.9 | 12.4
Fair Value, Measurements, Recurring | Power commodity contract | NAV |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Fair Value, Measurements, Recurring | Natural gas commodity contract |  |
Assets |  |
Derivative Asset | 0.7 | 7.3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (73.4) | (215.3)
Derivative Liability | 1.5 | 5.1
FIN 39 Derivative liability netting | (73.4) | (215.3)
Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 72.7 | 222.5
Derivative Liability, Fair Value, Gross Liability | 72.6 | 216.6
Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 2 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 1.4 | 0.1
Derivative Liability, Fair Value, Gross Liability | 2.3 | 3.8
Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 3 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Fair Value, Measurements, Recurring | Natural gas commodity contract | NAV |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | $ 0.0 | $ 0.0
Evergy Kansas Central |  |
Assets |  |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets, Other | Other assets, Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other, Other | Other, Other
Evergy Kansas Central | Fair Value, Measurements, Recurring |  |
Assets |  |
Total nuclear decommissioning trust | $ 365.1 | $ 318.8
Total rabbi trust | 24.5 | 24.9
Derivative Asset | 40.9 | 49.9
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (87.2) | (275.0)
Total Assets | 430.5 | 393.6
Derivative Liability | 40.7 | 48.0
FIN 39 Derivative liability netting | (80.3) | (265.8)
Total Liabilities | 40.7 | 48.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Core bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 56.2 | 51.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | High-yield bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 29.1 | 25.3
Evergy Kansas Central | Fair Value, Measurements, Recurring | Emerging markets bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 18.3 | 16.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Combination debt/equity/other fund |  |
Assets |  |
Total rabbi trust | 1.7 | 1.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Alternative investments fund |  |
Assets |  |
Total nuclear decommissioning trust | 37.9 | 31.8
Evergy Kansas Central | Fair Value, Measurements, Recurring | Real estate securities fund |  |
Assets |  |
Total nuclear decommissioning trust | 17.2 | 18.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.7 | 0.4
Total rabbi trust | 0.2 | 0.1
Evergy Kansas Central | Fair Value, Measurements, Recurring | Equity funds |  |
Assets |  |
Total rabbi trust | 7.4 | 7.3
Evergy Kansas Central | Fair Value, Measurements, Recurring | Fixed income funds |  |
Assets |  |
Total rabbi trust | 15.2 | 15.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 |  |
Assets |  |
Total nuclear decommissioning trust | 300.2 | 256.0
Total rabbi trust | 24.5 | 24.9
Derivative Asset, Fair Value, Gross Asset | 89.0 | 268.0
Total Assets | 413.7 | 548.9
Derivative Liability, Fair Value, Gross Liability | 82.0 | 250.6
Total Liabilities | 82.0 | 250.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Core bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 56.2 | 51.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | High-yield bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 29.1 | 25.3
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Emerging markets bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 18.3 | 16.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Combination debt/equity/other fund |  |
Assets |  |
Total rabbi trust | 1.7 | 1.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Alternative investments fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Real estate securities fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.7 | 0.4
Total rabbi trust | 0.2 | 0.1
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Equity funds |  |
Assets |  |
Total rabbi trust | 7.4 | 7.3
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Fixed income funds |  |
Assets |  |
Total rabbi trust | 15.2 | 15.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 33.6 | 46.6
Total Assets | 33.6 | 46.6
Derivative Liability, Fair Value, Gross Liability | 35.8 | 56.0
Total Liabilities | 35.8 | 56.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Core bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | High-yield bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Emerging markets bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Combination debt/equity/other fund |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Alternative investments fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Real estate securities fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Equity funds |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2 | Fixed income funds |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 5.5 | 10.3
Total Assets | 5.5 | 10.3
Derivative Liability, Fair Value, Gross Liability | 3.2 | 7.2
Total Liabilities | 3.2 | 7.2
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Core bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | High-yield bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Emerging markets bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Combination debt/equity/other fund |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Alternative investments fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Real estate securities fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Equity funds |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 3 | Fixed income funds |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV |  |
Assets |  |
Total nuclear decommissioning trust | 64.9 | 62.8
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total Assets | 64.9 | 62.8
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Total Liabilities | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Core bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | High-yield bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Emerging markets bond fund |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Combination debt/equity/other fund |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Alternative investments fund |  |
Assets |  |
Total nuclear decommissioning trust | 37.9 | 31.8
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Real estate securities fund |  |
Assets |  |
Total nuclear decommissioning trust | 17.2 | 18.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Equity funds |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Fixed income funds |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract |  |
Assets |  |
Derivative Asset | 40.2 | 42.6
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (13.8) | (59.7)
Derivative Liability | 40.3 | 46.6
FIN 39 Derivative liability netting | (6.9) | (50.5)
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 1 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 16.3 | 45.5
Derivative Liability, Fair Value, Gross Liability | 9.4 | 34.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 2 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 32.2 | 46.5
Derivative Liability, Fair Value, Gross Liability | 34.6 | 55.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 3 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 5.5 | 10.3
Derivative Liability, Fair Value, Gross Liability | 3.2 | 7.2
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | NAV |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract |  |
Assets |  |
Derivative Asset | 0.7 | 7.3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (73.4) | (215.3)
Derivative Liability | 0.4 | 1.4
FIN 39 Derivative liability netting | (73.4) | (215.3)
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 72.7 | 222.5
Derivative Liability, Fair Value, Gross Liability | 72.6 | 216.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 2 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 1.4 | 0.1
Derivative Liability, Fair Value, Gross Liability | 1.2 | 0.1
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 3 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | NAV |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 133.1 | 112.5
Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | Level 1 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 123.3 | 100.4
Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | Level 2 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | Level 3 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | NAV | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 9.8 | 12.1
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 72.6 | 62.9
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Level 1 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 72.6 | 62.9
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Level 2 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Level 3 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | NAV | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | $ 0.0 | $ 0.0
Evergy Metro |  |
Assets |  |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets, Other | Other assets, Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other, Other | Other, Other
Evergy Metro | Fair Value, Measurements, Recurring |  |
Assets |  |
Total nuclear decommissioning trust | $ 401.3 | $ 334.5
Derivative Asset | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (2.1) | (3.5)
Total self-insured health plan trust | 15.7 | 11.2
Total Assets | 417.0 | 345.7
Derivative Liability | 3.6 | 0.6
FIN 39 Derivative liability netting | (2.1) | (3.5)
Total Liabilities | 3.6 | 0.6
Evergy Metro | Fair Value, Measurements, Recurring | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 302.4 | 243.4
Total self-insured health plan trust | 2.0 | 1.6
Evergy Metro | Fair Value, Measurements, Recurring | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 3.2 | 6.6
Evergy Metro | Fair Value, Measurements, Recurring | U.S. Treasury |  |
Assets |  |
Total nuclear decommissioning trust | 47.9 | 40.7
Evergy Metro | Fair Value, Measurements, Recurring | U.S. Agency |  |
Assets |  |
Total nuclear decommissioning trust |  | 0.4
Evergy Metro | Fair Value, Measurements, Recurring | State and local obligations |  |
Assets |  |
Total nuclear decommissioning trust | 3.8 | 4.2
Evergy Metro | Fair Value, Measurements, Recurring | Corporate bonds |  |
Assets |  |
Total nuclear decommissioning trust | 43.9 | 39.1
Evergy Metro | Fair Value, Measurements, Recurring | Foreign governments |  |
Assets |  |
Total nuclear decommissioning trust | 0.1 | 0.1
Evergy Metro | Fair Value, Measurements, Recurring | Debt securities |  |
Assets |  |
Total self-insured health plan trust | 9.4 | 8.0
Evergy Metro | Fair Value, Measurements, Recurring | Cash and cash equivalents |  |
Assets |  |
Total self-insured health plan trust | 4.3 | 1.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 |  |
Assets |  |
Total nuclear decommissioning trust | 353.5 | 291.1
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total self-insured health plan trust | 8.8 | 5.7
Total Assets | 362.3 | 296.8
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Total Liabilities | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 302.4 | 243.4
Total self-insured health plan trust | 2.0 | 1.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 3.2 | 6.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury |  |
Assets |  |
Total nuclear decommissioning trust | 47.9 | 40.7
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | U.S. Agency |  |
Assets |  |
Total nuclear decommissioning trust |  | 0.4
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | State and local obligations |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Corporate bonds |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Foreign governments |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Debt securities |  |
Assets |  |
Total self-insured health plan trust | 2.5 | 2.5
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Cash and cash equivalents |  |
Assets |  |
Total self-insured health plan trust | 4.3 | 1.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 |  |
Assets |  |
Total nuclear decommissioning trust | 47.8 | 43.4
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total self-insured health plan trust | 6.9 | 5.5
Total Assets | 54.7 | 48.9
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Total Liabilities | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | U.S. Agency |  |
Assets |  |
Total nuclear decommissioning trust |  | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | State and local obligations |  |
Assets |  |
Total nuclear decommissioning trust | 3.8 | 4.2
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Corporate bonds |  |
Assets |  |
Total nuclear decommissioning trust | 43.9 | 39.1
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Foreign governments |  |
Assets |  |
Total nuclear decommissioning trust | 0.1 | 0.1
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Debt securities |  |
Assets |  |
Total self-insured health plan trust | 6.9 | 5.5
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Cash and cash equivalents |  |
Assets |  |
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 2.1 | 3.5
Total self-insured health plan trust | 0.0 | 0.0
Total Assets | 2.1 | 3.5
Derivative Liability, Fair Value, Gross Liability | 5.7 | 4.1
Total Liabilities | 5.7 | 4.1
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | U.S. Agency |  |
Assets |  |
Total nuclear decommissioning trust |  | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | State and local obligations |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | Corporate bonds |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | Foreign governments |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | Debt securities |  |
Assets |  |
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Level 3 | Cash and cash equivalents |  |
Assets |  |
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total self-insured health plan trust | 0.0 | 0.0
Total Assets | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Total Liabilities | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | Equity securities |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | Cash equivalents |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | U.S. Treasury |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | U.S. Agency |  |
Assets |  |
Total nuclear decommissioning trust |  | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | State and local obligations |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | Corporate bonds |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | Foreign governments |  |
Assets |  |
Total nuclear decommissioning trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | Debt securities |  |
Assets |  |
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | NAV | Cash and cash equivalents |  |
Assets |  |
Total self-insured health plan trust | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Power commodity contract |  |
Assets |  |
Derivative Asset | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (2.1) | (3.5)
Derivative Liability | 3.6 | 0.6
FIN 39 Derivative liability netting | (2.1) | (3.5)
Evergy Metro | Fair Value, Measurements, Recurring | Power commodity contract | Level 1 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Power commodity contract | Level 2 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Evergy Metro | Fair Value, Measurements, Recurring | Power commodity contract | Level 3 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 2.1 | 3.5
Derivative Liability, Fair Value, Gross Liability | 5.7 | 4.1
Evergy Metro | Fair Value, Measurements, Recurring | Power commodity contract | NAV |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | $ 0.0 | $ 0.0
Other Evergy |  |
Assets |  |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets, Other | Other assets, Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other, Other | Other, Other
Other Evergy | Fair Value, Measurements, Recurring |  |
Assets |  |
Total rabbi trust | $ 8.8 | $ 9.2
Derivative Asset | 1.8 | 0.4
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (1.0) | (1.0)
Total Assets | 10.6 | 9.6
Derivative Liability | 1.1 | 3.9
FIN 39 Derivative liability netting | (1.0) | (1.1)
Total Liabilities | 1.1 | 3.9
Other Evergy | Fair Value, Measurements, Recurring | Core bond fund |  |
Assets |  |
Total rabbi trust | 8.8 | 9.2
Other Evergy | Fair Value, Measurements, Recurring | Level 1 |  |
Assets |  |
Total rabbi trust | 8.8 | 9.2
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total Assets | 8.8 | 9.2
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.2
Total Liabilities | 0.0 | 0.2
Other Evergy | Fair Value, Measurements, Recurring | Level 1 | Core bond fund |  |
Assets |  |
Total rabbi trust | 8.8 | 9.2
Other Evergy | Fair Value, Measurements, Recurring | Level 2 |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total Assets | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 1.1 | 3.7
Total Liabilities | 1.1 | 3.7
Other Evergy | Fair Value, Measurements, Recurring | Level 2 | Core bond fund |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Level 3 |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 2.8 | 1.4
Total Assets | 2.8 | 1.4
Derivative Liability, Fair Value, Gross Liability | 1.0 | 1.1
Total Liabilities | 1.0 | 1.1
Other Evergy | Fair Value, Measurements, Recurring | Level 3 | Core bond fund |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | NAV |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Total Assets | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Total Liabilities | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | NAV | Core bond fund |  |
Assets |  |
Total rabbi trust | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract |  |
Assets |  |
Derivative Asset | 1.8 | 0.4
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | (1.0) | (1.0)
Derivative Liability | 0.0 | 0.2
FIN 39 Derivative liability netting | (1.0) | (1.1)
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract | Level 1 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.2
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract | Level 2 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract | Level 3 |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 2.8 | 1.4
Derivative Liability, Fair Value, Gross Liability | 1.0 | 1.1
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract | NAV |  |
Assets |  |
Derivative Asset, Fair Value, Gross Asset | 0.0 | 0.0
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Natural gas commodity contract |  |
Assets |  |
Derivative Liability | 1.1 | 3.7
FIN 39 Derivative liability netting | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1 |  |
Assets |  |
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 2 |  |
Assets |  |
Derivative Liability, Fair Value, Gross Liability | 1.1 | 3.7
Other Evergy | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 3 |  |
Assets |  |
Derivative Liability, Fair Value, Gross Liability | 0.0 | 0.0
Other Evergy | Fair Value, Measurements, Recurring | Natural gas commodity contract | NAV |  |
Assets |  |
Derivative Liability, Fair Value, Gross Liability | $ 0.0 | $ 0.0

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