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FAIR VALUE MEASUREMENTS - Recurring (Details) - USD ($) $ in Millions	Mar. 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	$ 689.5	$ 653.3
Total rabbi trust	33.7	34.1
Derivative Asset	59.0	50.3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(130.8)	(279.5)
Total self-insured health plan trust	12.0	11.2
Total Assets	794.2	748.9
Derivative Liability	53.7	52.5
FIN 39 Derivative liability netting	(122.5)	(270.4)
Total Liabilities	53.7	52.5
Fair Value, Measurements, Recurring | Level 1
Assets
Total nuclear decommissioning trust	581.0	547.1
Total rabbi trust	33.7	34.1
Derivative Asset, Fair Value, Gross Asset	132.9	268.0
Total self-insured health plan trust	7.2	5.7
Total Assets	754.8	854.9
Derivative Liability, Fair Value, Gross Liability	118.1	250.8
Total Liabilities	118.1	250.8
Fair Value, Measurements, Recurring | Level 2
Assets
Total nuclear decommissioning trust	44.8	43.4
Total rabbi trust	0.0	0.0
Derivative Asset, Fair Value, Gross Asset	37.7	46.6
Total self-insured health plan trust	4.8	5.5
Total Assets	87.3	95.5
Derivative Liability, Fair Value, Gross Liability	45.2	59.7
Total Liabilities	45.2	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	19.2	15.2
Total self-insured health plan trust	0.0	0.0
Total Assets	19.2	15.2
Derivative Liability, Fair Value, Gross Liability	12.9	12.4
Total Liabilities	12.9	12.4
Fair Value, Measurements, Recurring | NAV
Assets
Total nuclear decommissioning trust	63.7	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	63.7	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	48.1	43.0
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(28.6)	(64.2)
Derivative Liability	47.7	47.4
FIN 39 Derivative liability netting	(20.3)	(55.1)
Fair Value, Measurements, Recurring | Power commodity contract | Level 1
Assets
Derivative Asset, Fair Value, Gross Asset	21.0	45.5
Derivative Liability, Fair Value, Gross Liability	13.7	34.2
Fair Value, Measurements, Recurring | Power commodity contract | Level 2
Assets
Derivative Asset, Fair Value, Gross Asset	36.5	46.5
Derivative Liability, Fair Value, Gross Liability	41.4	55.9
Fair Value, Measurements, Recurring | Power commodity contract | Level 3
Assets
Derivative Asset, Fair Value, Gross Asset	19.2	15.2
Derivative Liability, Fair Value, Gross Liability	12.9	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	10.9	7.3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(102.2)	(215.3)
Derivative Liability	6.0	5.1
FIN 39 Derivative liability netting	(102.2)	(215.3)
Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1
Assets
Derivative Asset, Fair Value, Gross Asset	111.9	222.5
Derivative Liability, Fair Value, Gross Liability	104.4	216.6
Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 2
Assets
Derivative Asset, Fair Value, Gross Asset	1.2	0.1
Derivative Liability, Fair Value, Gross Liability	3.8	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	$ 335.1	$ 318.8
Total rabbi trust	24.4	24.9
Derivative Asset	59.0	49.9
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(127.2)	(275.0)
Total Assets	418.5	393.6
Derivative Liability	45.6	48.0
FIN 39 Derivative liability netting	(118.9)	(265.8)
Total Liabilities	45.6	48.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Core bond fund
Assets
Total nuclear decommissioning trust	52.9	51.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | High-yield bond fund
Assets
Total nuclear decommissioning trust	26.1	25.3
Evergy Kansas Central | Fair Value, Measurements, Recurring | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	16.6	16.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Combination debt/equity/other fund
Assets
Total rabbi trust	1.8	1.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Alternative investments fund
Assets
Total nuclear decommissioning trust	33.5	31.8
Evergy Kansas Central | Fair Value, Measurements, Recurring | Real estate securities fund
Assets
Total nuclear decommissioning trust	18.3	18.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Cash equivalents
Assets
Total nuclear decommissioning trust	0.4	0.4
Total rabbi trust	0.1	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	15.1	15.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1
Assets
Total nuclear decommissioning trust	271.4	256.0
Total rabbi trust	24.4	24.9
Derivative Asset, Fair Value, Gross Asset	132.9	268.0
Total Assets	428.7	548.9
Derivative Liability, Fair Value, Gross Liability	116.8	250.6
Total Liabilities	116.8	250.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Core bond fund
Assets
Total nuclear decommissioning trust	52.9	51.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | High-yield bond fund
Assets
Total nuclear decommissioning trust	26.1	25.3
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	16.6	16.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Combination debt/equity/other fund
Assets
Total rabbi trust	1.8	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	0.4	0.4
Total rabbi trust	0.1	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	15.1	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	37.7	46.6
Total Assets	37.7	46.6
Derivative Liability, Fair Value, Gross Liability	42.5	56.0
Total Liabilities	42.5	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	15.6	10.3
Total Assets	15.6	10.3
Derivative Liability, Fair Value, Gross Liability	5.2	7.2
Total Liabilities	5.2	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	63.7	62.8
Total rabbi trust	0.0	0.0
Derivative Asset, Fair Value, Gross Asset	0.0	0.0
Total Assets	63.7	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	33.5	31.8
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Real estate securities fund
Assets
Total nuclear decommissioning trust	18.3	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	48.1	42.6
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(25.0)	(59.7)
Derivative Liability	42.3	46.6
FIN 39 Derivative liability netting	(16.7)	(50.5)
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 1
Assets
Derivative Asset, Fair Value, Gross Asset	21.0	45.5
Derivative Liability, Fair Value, Gross Liability	12.4	34.0
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 2
Assets
Derivative Asset, Fair Value, Gross Asset	36.5	46.5
Derivative Liability, Fair Value, Gross Liability	41.4	55.9
Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 3
Assets
Derivative Asset, Fair Value, Gross Asset	15.6	10.3
Derivative Liability, Fair Value, Gross Liability	5.2	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	10.9	7.3
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(102.2)	(215.3)
Derivative Liability	3.3	1.4
FIN 39 Derivative liability netting	(102.2)	(215.3)
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1
Assets
Derivative Asset, Fair Value, Gross Asset	111.9	222.5
Derivative Liability, Fair Value, Gross Liability	104.4	216.6
Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 2
Assets
Derivative Asset, Fair Value, Gross Asset	1.2	0.1
Derivative Liability, Fair Value, Gross Liability	1.1	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	120.0	112.5
Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | Level 1 | Equity securities
Assets
Total nuclear decommissioning trust	108.1	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	11.9	12.1
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Equity securities
Assets
Total nuclear decommissioning trust	67.3	62.9
Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Level 1 | Equity securities
Assets
Total nuclear decommissioning trust	67.3	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	$ 354.4	$ 334.5
Derivative Asset	0.0	0.0
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(2.2)	(3.5)
Total self-insured health plan trust	12.0	11.2
Total Assets	366.4	345.7
Derivative Liability	3.6	0.6
FIN 39 Derivative liability netting	(2.2)	(3.5)
Total Liabilities	3.6	0.6
Evergy Metro | Fair Value, Measurements, Recurring | Equity securities
Assets
Total nuclear decommissioning trust	260.6	243.4
Total self-insured health plan trust	1.7	1.6
Evergy Metro | Fair Value, Measurements, Recurring | Cash equivalents
Assets
Total nuclear decommissioning trust	4.5	6.6
Evergy Metro | Fair Value, Measurements, Recurring | U.S. Treasury
Assets
Total nuclear decommissioning trust	44.5	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	4.3	4.2
Evergy Metro | Fair Value, Measurements, Recurring | Corporate bonds
Assets
Total nuclear decommissioning trust	40.4	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	6.6	8.0
Evergy Metro | Fair Value, Measurements, Recurring | Cash and cash equivalents
Assets
Total self-insured health plan trust	3.7	1.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 1
Assets
Total nuclear decommissioning trust	309.6	291.1
Derivative Asset, Fair Value, Gross Asset	0.0	0.0
Total self-insured health plan trust	7.2	5.7
Total Assets	316.8	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	260.6	243.4
Total self-insured health plan trust	1.7	1.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Cash equivalents
Assets
Total nuclear decommissioning trust	4.5	6.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury
Assets
Total nuclear decommissioning trust	44.5	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	1.8	2.5
Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Cash and cash equivalents
Assets
Total self-insured health plan trust	3.7	1.6
Evergy Metro | Fair Value, Measurements, Recurring | Level 2
Assets
Total nuclear decommissioning trust	44.8	43.4
Derivative Asset, Fair Value, Gross Asset	0.0	0.0
Total self-insured health plan trust	4.8	5.5
Total Assets	49.6	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	4.3	4.2
Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Corporate bonds
Assets
Total nuclear decommissioning trust	40.4	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	4.8	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	2.2	3.5
Total self-insured health plan trust	0.0	0.0
Total Assets	2.2	3.5
Derivative Liability, Fair Value, Gross Liability	5.8	4.1
Total Liabilities	5.8	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	(2.2)	(3.5)
Derivative Liability	3.6	0.6
FIN 39 Derivative liability netting	(2.2)	(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
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Derivative Liability, Fair Value, Gross Liability	0.0	0.0
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Assets
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Derivative Liability, Fair Value, Gross Liability	5.8	4.1
Evergy Metro | Fair Value, Measurements, Recurring | Power commodity contract | NAV
Assets
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Assets
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Assets
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Assets
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Assets
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Assets
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Assets
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Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract
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Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(1.4)	(1.0)
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FIN 39 Derivative liability netting	(1.4)	(1.1)
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract | Level 1
Assets
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Assets
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Derivative Liability, Fair Value, Gross Liability	1.9	1.1
Other Evergy | Fair Value, Measurements, Recurring | Power commodity contract | NAV
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FIN 39 Derivative liability netting	0.0	0.0
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