FAIR VALUE MEASUREMENTS - Recurring (Details) - USD ($)
$ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Interest Rate Swap [Member] |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
$ 1.2
|
$ 0.6
|
| Fair Value, Measurements, Recurring |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
1,080.2
|
1,016.8
|
| Total rabbi trust |
29.8
|
31.2
|
| Total self-insured health plan trust |
17.0
|
20.5
|
| Derivative Asset |
78.4
|
45.0
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
$ (66.3)
|
$ (37.9)
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Assets |
$ 1,205.4
|
$ 1,113.5
|
| Derivative Liability |
50.1
|
37.8
|
| FIN 39 Derivative liability netting |
$ (65.9)
|
$ (36.8)
|
| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Liabilities |
$ 50.1
|
$ 37.8
|
| Fair Value, Measurements, Recurring | Level 1 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
948.6
|
888.4
|
| Total rabbi trust |
29.8
|
31.2
|
| Total self-insured health plan trust |
6.7
|
9.0
|
| Derivative Asset, Fair Value, Gross Asset |
79.1
|
36.5
|
| Total Assets |
1,064.2
|
965.1
|
| Derivative Liability, Fair Value, Gross Liability |
66.2
|
30.3
|
| Total Liabilities |
66.2
|
30.3
|
| Fair Value, Measurements, Recurring | Level 2 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
58.4
|
53.7
|
| Total rabbi trust |
0.0
|
0.0
|
| Total self-insured health plan trust |
10.3
|
11.5
|
| Derivative Asset, Fair Value, Gross Asset |
33.6
|
36.9
|
| Total Assets |
102.3
|
102.1
|
| Derivative Liability, Fair Value, Gross Liability |
46.4
|
39.1
|
| Total Liabilities |
46.4
|
39.1
|
| Fair Value, Measurements, Recurring | Level 3 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.0
|
0.0
|
| Total rabbi trust |
0.0
|
0.0
|
| Total self-insured health plan trust |
0.0
|
0.0
|
| Derivative Asset, Fair Value, Gross Asset |
32.0
|
9.5
|
| Total Assets |
32.0
|
9.5
|
| Derivative Liability, Fair Value, Gross Liability |
3.4
|
5.2
|
| Total Liabilities |
3.4
|
5.2
|
| Fair Value, Measurements, Recurring | NAV |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
73.2
|
74.7
|
| Total rabbi trust |
0.0
|
0.0
|
| Total self-insured health plan trust |
0.0
|
0.0
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Total Assets |
73.2
|
74.7
|
| 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 |
76.7
|
43.2
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
(60.2)
|
(32.7)
|
| Derivative Liability |
48.7
|
36.2
|
| FIN 39 Derivative liability netting |
(59.8)
|
(31.6)
|
| Fair Value, Measurements, Recurring | Power commodity contract | Level 1 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
72.5
|
30.1
|
| Derivative Liability, Fair Value, Gross Liability |
58.7
|
23.5
|
| Fair Value, Measurements, Recurring | Power commodity contract | Level 2 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
32.4
|
36.3
|
| Derivative Liability, Fair Value, Gross Liability |
46.4
|
39.1
|
| Fair Value, Measurements, Recurring | Power commodity contract | Level 3 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
32.0
|
9.5
|
| Derivative Liability, Fair Value, Gross Liability |
3.4
|
5.2
|
| 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 |
0.5
|
1.2
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
(6.1)
|
(5.2)
|
| Derivative Liability |
1.4
|
1.6
|
| FIN 39 Derivative liability netting |
(6.1)
|
(5.2)
|
| Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
6.6
|
6.4
|
| Derivative Liability, Fair Value, Gross Liability |
7.5
|
6.8
|
| Fair Value, Measurements, Recurring | Natural gas 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
|
| 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
|
| Fair Value, Measurements, Recurring | Interest Rate Swap [Member] |
|
|
| Assets |
|
|
| Derivative Asset |
1.2
|
0.6
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
0.0
|
0.0
|
| Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | Level 1 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | Level 2 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
1.2
|
0.6
|
| Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | Level 3 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | NAV |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
481.5
|
466.0
|
| Total rabbi trust |
22.5
|
23.5
|
| Derivative Asset |
46.9
|
39.9
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
$ (65.0)
|
$ (35.0)
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Assets |
$ 550.9
|
$ 529.4
|
| Derivative Liability |
50.1
|
37.8
|
| FIN 39 Derivative liability netting |
$ (64.5)
|
$ (33.9)
|
| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Liabilities |
$ 50.1
|
$ 37.8
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Core bond fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
71.9
|
71.5
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | High-yield bond fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
24.2
|
23.9
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Emerging markets bond fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
24.1
|
23.9
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Alternative investments fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
47.7
|
49.6
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Real estate securities fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
17.2
|
16.8
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Cash equivalents |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.5
|
0.8
|
| Total rabbi trust |
0.2
|
0.2
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Fixed income funds |
|
|
| Assets |
|
|
| Total rabbi trust |
13.0
|
13.7
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Equity funds |
|
|
| Assets |
|
|
| Total rabbi trust |
7.6
|
7.8
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Combination debt/equity/other fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
23.5
|
23.8
|
| Total rabbi trust |
1.7
|
1.8
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
408.3
|
391.3
|
| Total rabbi trust |
22.5
|
23.5
|
| Derivative Asset, Fair Value, Gross Asset |
79.1
|
36.5
|
| Total Assets |
509.9
|
451.3
|
| Derivative Liability, Fair Value, Gross Liability |
66.2
|
30.3
|
| Total Liabilities |
66.2
|
30.3
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Core bond fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
71.9
|
71.5
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | High-yield bond fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
24.2
|
23.9
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Emerging markets bond fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
24.1
|
23.9
|
| 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 |
0.5
|
0.8
|
| Total rabbi trust |
0.2
|
0.2
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Fixed income funds |
|
|
| Assets |
|
|
| Total rabbi trust |
13.0
|
13.7
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Equity funds |
|
|
| Assets |
|
|
| Total rabbi trust |
7.6
|
7.8
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 1 | Combination debt/equity/other fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
23.5
|
23.8
|
| Total rabbi trust |
1.7
|
1.8
|
| 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 |
32.4
|
36.3
|
| Total Assets |
32.4
|
36.3
|
| Derivative Liability, Fair Value, Gross Liability |
46.4
|
39.1
|
| Total Liabilities |
46.4
|
39.1
|
| 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 | 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 | Fixed income funds |
|
|
| Assets |
|
|
| 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 | Combination debt/equity/other fund |
|
|
| 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 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.0
|
0.0
|
| Total rabbi trust |
0.0
|
0.0
|
| Derivative Asset, Fair Value, Gross Asset |
0.4
|
2.1
|
| Total Assets |
0.4
|
2.1
|
| Derivative Liability, Fair Value, Gross Liability |
2.0
|
2.3
|
| Total Liabilities |
2.0
|
2.3
|
| 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 | 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 | Fixed income funds |
|
|
| Assets |
|
|
| 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 | Combination debt/equity/other fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.0
|
0.0
|
| Total rabbi trust |
0.0
|
0.0
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
73.2
|
74.7
|
| Total rabbi trust |
0.0
|
0.0
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Total Assets |
73.2
|
74.7
|
| 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 | Alternative investments fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
47.7
|
49.6
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Real estate securities fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
17.2
|
16.8
|
| 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 | Fixed income funds |
|
|
| Assets |
|
|
| 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 | Combination debt/equity/other fund |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.0
|
0.0
|
| Total rabbi trust |
0.0
|
0.0
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract |
|
|
| Assets |
|
|
| Derivative Asset |
46.4
|
38.7
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
(58.9)
|
(29.8)
|
| Derivative Liability |
48.7
|
36.2
|
| FIN 39 Derivative liability netting |
(58.4)
|
(28.7)
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 1 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
72.5
|
30.1
|
| Derivative Liability, Fair Value, Gross Liability |
58.7
|
23.5
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 2 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
32.4
|
36.3
|
| Derivative Liability, Fair Value, Gross Liability |
46.4
|
39.1
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Power commodity contract | Level 3 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
0.4
|
2.1
|
| Derivative Liability, Fair Value, Gross Liability |
2.0
|
2.3
|
| 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 |
0.5
|
1.2
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
(6.1)
|
(5.2)
|
| Derivative Liability |
1.4
|
1.6
|
| FIN 39 Derivative liability netting |
(6.1)
|
(5.2)
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas commodity contract | Level 1 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
6.6
|
6.4
|
| Derivative Liability, Fair Value, Gross Liability |
7.5
|
6.8
|
| Evergy Kansas Central | Fair Value, Measurements, Recurring | Natural gas 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 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 |
172.6
|
159.8
|
| Evergy Kansas Central | Domestic | Fair Value, Measurements, Recurring | Level 1 | Equity securities |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
164.3
|
151.5
|
| 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 |
8.3
|
8.3
|
| Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Equity securities |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
99.8
|
95.9
|
| Evergy Kansas Central | International | Fair Value, Measurements, Recurring | Level 1 | Equity securities |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
99.8
|
95.9
|
| 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 | Fair Value, Measurements, Recurring |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
598.7
|
550.8
|
| Total self-insured health plan trust |
17.0
|
20.5
|
| Derivative Asset |
28.2
|
4.3
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
$ (1.0)
|
$ (2.3)
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Assets |
$ 643.9
|
$ 575.6
|
| Derivative Liability |
0.0
|
0.0
|
| FIN 39 Derivative liability netting |
$ (1.0)
|
$ (2.3)
|
| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Liabilities |
$ 0.0
|
$ 0.0
|
| Evergy Metro | Fair Value, Measurements, Recurring | Equity securities |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
482.6
|
436.8
|
| Total self-insured health plan trust |
3.0
|
2.7
|
| Evergy Metro | Fair Value, Measurements, Recurring | Cash equivalents |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
3.4
|
3.5
|
| Evergy Metro | Fair Value, Measurements, Recurring | U.S. Treasury |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
54.3
|
56.8
|
| Evergy Metro | Fair Value, Measurements, Recurring | U.S. Agency |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.1
|
0.1
|
| Evergy Metro | Fair Value, Measurements, Recurring | State and local obligations |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
2.1
|
2.1
|
| Evergy Metro | Fair Value, Measurements, Recurring | Corporate bonds |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
55.8
|
51.5
|
| Evergy Metro | Fair Value, Measurements, Recurring | Foreign governments |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.4
|
|
| Evergy Metro | Fair Value, Measurements, Recurring | Debt securities |
|
|
| Assets |
|
|
| Total self-insured health plan trust |
13.9
|
15.3
|
| Evergy Metro | Fair Value, Measurements, Recurring | Cash and cash equivalents |
|
|
| Assets |
|
|
| Total self-insured health plan trust |
0.1
|
2.5
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 1 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
540.3
|
497.1
|
| Total self-insured health plan trust |
6.7
|
9.0
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Total Assets |
547.0
|
506.1
|
| 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 |
482.6
|
436.8
|
| Total self-insured health plan trust |
3.0
|
2.7
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Cash equivalents |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
3.4
|
3.5
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
54.3
|
56.8
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | U.S. Agency |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.0
|
0.0
|
| 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
|
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Total self-insured health plan trust |
3.6
|
3.8
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 1 | Cash and cash equivalents |
|
|
| Assets |
|
|
| Total self-insured health plan trust |
0.1
|
2.5
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 2 |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
58.4
|
53.7
|
| Total self-insured health plan trust |
10.3
|
11.5
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Total Assets |
68.7
|
65.2
|
| 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 |
0.1
|
0.1
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | State and local obligations |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
2.1
|
2.1
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Corporate bonds |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
55.8
|
51.5
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Foreign governments |
|
|
| Assets |
|
|
| Total nuclear decommissioning trust |
0.4
|
|
| Evergy Metro | Fair Value, Measurements, Recurring | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Total self-insured health plan trust |
10.3
|
11.5
|
| 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
|
| Total self-insured health plan trust |
0.0
|
0.0
|
| Derivative Asset, Fair Value, Gross Asset |
29.2
|
6.6
|
| Total Assets |
29.2
|
6.6
|
| Derivative Liability, Fair Value, Gross Liability |
1.0
|
2.3
|
| Total Liabilities |
1.0
|
2.3
|
| 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
|
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
|
|
| 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
|
| Total self-insured health plan 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
|
| 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
|
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
|
|
| 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 |
28.2
|
4.3
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
(1.0)
|
(2.3)
|
| Derivative Liability |
0.0
|
0.0
|
| FIN 39 Derivative liability netting |
(1.0)
|
(2.3)
|
| 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 |
29.2
|
6.6
|
| Derivative Liability, Fair Value, Gross Liability |
1.0
|
2.3
|
| 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 | Fair Value, Measurements, Recurring |
|
|
| Assets |
|
|
| Total rabbi trust |
7.3
|
7.7
|
| Derivative Asset |
3.3
|
0.8
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
$ (0.3)
|
$ (0.6)
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Assets |
$ 10.6
|
$ 8.5
|
| Derivative Liability |
0.0
|
0.0
|
| FIN 39 Derivative liability netting |
$ (0.4)
|
$ (0.6)
|
| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
Other, Other
|
Other, Other
|
| Total Liabilities |
$ 0.0
|
$ 0.0
|
| Other Evergy | Fair Value, Measurements, Recurring | Core bond fund |
|
|
| Assets |
|
|
| Total rabbi trust |
7.3
|
7.7
|
| Other Evergy | Fair Value, Measurements, Recurring | Level 1 |
|
|
| Assets |
|
|
| Total rabbi trust |
7.3
|
7.7
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Total Assets |
7.3
|
7.7
|
| Derivative Liability, Fair Value, Gross Liability |
0.0
|
0.0
|
| Total Liabilities |
0.0
|
0.0
|
| Other Evergy | Fair Value, Measurements, Recurring | Level 1 | Core bond fund |
|
|
| Assets |
|
|
| Total rabbi trust |
7.3
|
7.7
|
| Other Evergy | Fair Value, Measurements, Recurring | Level 2 |
|
|
| Assets |
|
|
| Total rabbi trust |
0.0
|
0.0
|
| Derivative Asset, Fair Value, Gross Asset |
1.2
|
0.6
|
| Total Assets |
1.2
|
0.6
|
| Derivative Liability, Fair Value, Gross Liability |
0.0
|
0.0
|
| Total Liabilities |
0.0
|
0.0
|
| 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 |
2.4
|
0.8
|
| Total Assets |
2.4
|
0.8
|
| Derivative Liability, Fair Value, Gross Liability |
0.4
|
0.6
|
| Total Liabilities |
0.4
|
0.6
|
| 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 |
2.1
|
0.2
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
(0.3)
|
(0.6)
|
| Derivative Liability |
0.0
|
0.0
|
| FIN 39 Derivative liability netting |
(0.4)
|
(0.6)
|
| 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
|
0.0
|
| 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 |
2.4
|
0.8
|
| Derivative Liability, Fair Value, Gross Liability |
0.4
|
0.6
|
| 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 | Interest Rate Swap [Member] |
|
|
| Assets |
|
|
| Derivative Asset |
1.2
|
0.6
|
| Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset |
0.0
|
0.0
|
| Other Evergy | Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | Level 1 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Other Evergy | Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | Level 2 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
1.2
|
|
| Other Evergy | Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | Level 3 |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
0.0
|
0.0
|
| Other Evergy | Fair Value, Measurements, Recurring | Interest Rate Swap [Member] | NAV |
|
|
| Assets |
|
|
| Derivative Asset, Fair Value, Gross Asset |
$ 0.0
|
$ 0.0
|