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PENSION PLANS AND POST-RETIREMENT BENEFITS
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
PENSION PLANS AND POST-RETIREMENT BENEFITS PENSION PLANS AND POST-RETIREMENT BENEFITS
Evergy and certain of its subsidiaries maintain, and Evergy Kansas Central and Evergy Metro participate in, qualified non-contributory defined benefit pension plans covering the majority of Evergy Kansas Central's and Evergy Metro's employees as well as certain non-qualified plans covering certain active and retired officers.
For the majority of employees, pension benefits under these plans reflect the employees' compensation, years of service and age at retirement. However, for the plan covering Evergy Kansas Central's employees, the benefits for non-union employees hired between 2002 and the second quarter of 2018 and union employees hired beginning in 2012 are derived from a cash balance account formula. The plan was closed to future non-union employees in 2018. For the plans covering Evergy Metro's employees, the benefits for union employees hired beginning in 2014 are derived from a cash balance account formula and the plans were closed to future non-union employees in 2014.
Evergy and its subsidiaries also provide certain post-retirement health care and life insurance benefits for substantially all retired employees of Evergy Kansas Central and Evergy Metro and their respective shares of Wolf Creek Generating Station's (Wolf Creek) post-retirement benefit plans.
The Evergy Companies record pension and post-retirement expense in accordance with rate orders from the KCC and MPSC that allow the difference between pension and post-retirement costs under GAAP and costs for ratemaking to be recognized as a regulatory asset or liability.  This difference between financial and regulatory accounting methods is due to timing and will be eliminated over the life of the plans.
The following tables provide the components of net periodic benefit costs prior to the effects of capitalization and sharing with joint owners of power plants.
Evergy
Three Months Ended
June 30		Year to Date
June 30
2026202520262025
Components of net periodic benefit costs(millions)
Pension Benefits
Service cost$10.3 $11.3 $20.6 $22.6 
Interest cost24.1 23.6 48.3 47.1 
Expected return on plan assets(22.6)(22.0)(45.2)(44.0)
Prior service cost0.5 0.4 1.0 0.9 
Recognized net actuarial gain(3.3)(4.6)(6.6)(9.2)
Net periodic benefit costs before regulatory adjustment and intercompany allocations9.0 8.7 18.1 17.4 
Regulatory adjustment4.8 4.1 8.7 7.3 
Net periodic benefit costs$13.8 $12.8 $26.8 $24.7 
Post-Retirement Benefits
Service cost$0.4 $0.3 $0.8 $0.7 
Interest cost2.0 2.5 4.1 5.0 
Expected return on plan assets(2.1)(2.7)(4.2)(5.4)
Prior service cost0.1 0.1 0.1 0.2 
Recognized net actuarial gain(0.5)(1.0)(1.0)(2.0)
Net periodic benefit income before regulatory adjustment and intercompany allocations(0.1)(0.8)(0.2)(1.5)
Regulatory adjustment(0.5)(0.2)(1.0)(0.4)
Net periodic benefit income$(0.6)$(1.0)$(1.2)$(1.9)
Evergy Kansas Central
Three Months Ended
June 30		Year to Date
June 30
2026202520262025
Components of net periodic benefit costs(millions)
Pension Benefits
Service cost$4.2 $4.7 $8.3 $9.3 
Interest cost12.0 11.9 24.1 23.8 
Expected return on plan assets(11.1)(10.8)(22.2)(21.5)
Prior service cost0.5 0.5 1.0 1.0 
Recognized net actuarial (gain) loss0.3 (0.1)0.6 (0.2)
Net periodic benefit costs before regulatory adjustment and intercompany allocations5.9 6.2 11.8 12.4 
Regulatory adjustment(1.7)(1.8)(3.9)(4.5)
Intercompany allocations(0.3)(0.9)(0.6)(1.5)
Net periodic benefit costs$3.9 $3.5 $7.3 $6.4 
Post-Retirement Benefits
Service cost$0.2 $0.3 $0.4 $0.5 
Interest cost0.9 1.3 2.0 2.6 
Expected return on plan assets(1.0)(1.4)(2.1)(2.8)
Prior service cost0.1 — 0.2 0.1 
Recognized net actuarial gain(0.3)(0.5)(0.6)(1.0)
Net periodic benefit income before regulatory adjustment and intercompany allocations(0.1)(0.3)(0.1)(0.6)
Regulatory adjustment(0.2)— (0.4)— 
Intercompany allocations— — (0.1)— 
Net periodic benefit income$(0.3)$(0.3)$(0.6)$(0.6)
Evergy Metro
Three Months Ended June 30Year to Date
June 30
2026202520262025
Components of net periodic benefit costs(millions)
Pension Benefits
Service cost$6.1 $6.6 $12.3 $13.3 
Interest cost11.8 11.4 23.7 22.8 
Expected return on plan assets(11.5)(11.2)(23.0)(22.5)
Recognized net actuarial gain(3.3)(4.3)(6.8)(8.6)
Net periodic benefit costs before regulatory adjustment and intercompany allocations3.1 2.5 6.2 5.0 
Regulatory adjustment6.3 5.7 12.3 11.5 
Intercompany allocations(0.7)0.2 (1.2)0.3 
Net periodic benefit costs$8.7 $8.4 $17.3 $16.8 
Post-Retirement Benefits
Service cost$0.2 $0.2 $0.4 $0.3 
Interest cost1.1 1.3 2.2 2.5 
Expected return on plan assets(1.1)(1.4)(2.3)(2.7)
Prior service cost(0.1)(0.1)(0.2)(0.2)
Recognized net actuarial gain(0.2)(0.6)(0.4)(1.0)
Net periodic benefit income before regulatory adjustment and intercompany allocations(0.1)(0.6)(0.3)(1.1)
Regulatory adjustment(0.2)(0.2)(0.5)(0.3)
Intercompany allocations0.1 0.3 0.3 0.4 
Net periodic benefit income$(0.2)$(0.5)$(0.5)$(1.0)
The components of net periodic benefit costs other than the service cost component are included in other expense on the Evergy Companies' consolidated statements of income and comprehensive income.
Year to date June 30, 2026, Evergy, Evergy Kansas Central and Evergy Metro made cash pension contributions of $46.8 million, $32.0 million and $14.8 million, respectively. Evergy expects to make additional cash pension contributions of $34.8 million in 2026 to satisfy the Employee Retirement Income Security Act of 1974, as amended (ERISA), funding requirements and KCC and MPSC rate orders, of which $18.4 million is expected to be paid by Evergy Kansas Central and $16.4 million is expected to be paid by Evergy Metro.
Year to date June 30, 2026, Evergy, Evergy Kansas Central and Evergy Metro made post-retirement benefit contributions of $0.3 million, $0.1 million and $0.2 million, respectively. Evergy, Evergy Kansas Central and Evergy Metro expect to make additional contributions in 2026 of $0.2 million, $0.1 million and $0.1 million, respectively, to the post-retirement benefit plans.