PENSION PLANS AND POST-RETIREMENT BENEFITS (Tables)

6 Months Ended

Jun. 30, 2022

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

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.

	Pension Benefits						Post-Retirement Benefits
Three Months Ended June 30, 2022	Evergy		Evergy Kansas Central		Evergy Metro		Evergy		Evergy Kansas Central		Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	20.0	$	7.7	$	12.3	$	0.7	$	0.4	$	0.3
Interest cost	19.8		9.7		10.0		2.0		1.0		0.9
Expected return on plan assets	(26.0)		(12.8)		(14.1)		(2.6)		(1.6)		(1.0)
Prior service cost	0.4		0.5		—		0.1		0.1		(0.3)
Recognized net actuarial loss	8.8		6.4		9.6		—		—		—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	23.0		11.5		17.8		0.2		(0.1)		(0.1)
Regulatory adjustment	15.0		2.8		5.7		(0.6)		(0.7)		0.7
Intercompany allocations	—		(0.1)		(3.9)		—		—		(0.2)
Net periodic benefit costs (income)	$	38.0	$	14.2	$	19.6	$	(0.4)	$	(0.8)	$	0.4

	Pension Benefits						Post-Retirement Benefits
Year to Date June 30, 2022	Evergy		Evergy Kansas Central		Evergy Metro		Evergy		Evergy Kansas Central		Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	39.9	$	15.4	$	24.5	$	1.5	$	0.8	$	0.7
Interest cost	39.6		19.4		19.9		4.0		2.0		1.9
Expected return on plan assets	(52.0)		(25.6)		(28.2)		(5.1)		(3.2)		(1.9)
Prior service cost	0.9		1.0		—		0.2		0.2		(0.7)
Recognized net actuarial (gain)/loss	17.5		12.8		19.3		(0.1)		(0.1)		(0.2)
Net periodic benefit costs before regulatory adjustment and intercompany allocations	45.9		23.0		35.5		0.5		(0.3)		(0.2)
Regulatory adjustment	30.9		5.7		12.2		(1.2)		(1.4)		1.3
Intercompany allocations	—		0.4		(8.4)		—		0.1		(0.3)
Net periodic benefit costs (income)	$	76.8	$	29.1	$	39.3	$	(0.7)	$	(1.6)	$	0.8

	Pension Benefits						Post-Retirement Benefits
Three Months Ended June 30, 2021	Evergy		Evergy Kansas Central		Evergy Metro		Evergy		Evergy Kansas Central		Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	21.2	$	7.5	$	13.7	$	0.9	$	0.4	$	0.5
Interest cost	21.3		10.4		10.8		1.9		1.0		0.9
Expected return on plan assets	(26.8)		(13.5)		(14.4)		(2.2)		(1.5)		(0.6)
Prior service cost	0.5		0.5		—		0.2		0.1		(0.2)
Recognized net actuarial (gain)/loss	14.7		9.5		11.1		0.3		0.1		(0.1)
Net periodic benefit costs before regulatory adjustment and intercompany allocations	30.9		14.4		21.2		1.1		0.1		0.5
Regulatory adjustment	6.6		0.1		1.6		(1.3)		(0.8)		—
Intercompany allocations	—		0.8		(6.3)		—		—		(0.1)
Net periodic benefit costs (income)	$	37.5	$	15.3	$	16.5	$	(0.2)	$	(0.7)	$	0.4

	Pension Benefits						Post-Retirement Benefits
Year to Date June 30, 2021	Evergy		Evergy Kansas Central		Evergy Metro		Evergy		Evergy Kansas Central		Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	42.3	$	14.9	$	27.4	$	1.7	$	0.8	$	0.9
Interest cost	42.6		20.7		21.6		3.9		2.0		1.9
Expected return on plan assets	(53.6)		(27.1)		(28.9)		(4.4)		(3.1)		(1.3)
Prior service cost	1.0		1.0		—		0.3		0.2		(0.5)
Recognized net actuarial (gain)/loss	29.5		19.3		22.3		0.6		0.3		(0.1)
Net periodic benefit costs before regulatory adjustment and intercompany allocations	61.8		28.8		42.4		2.1		0.2		0.9
Regulatory adjustment	13.7		(0.8)		4.6		(2.5)		(1.6)		0.1
Intercompany allocations	—		1.2		(12.2)		—		—		(0.2)
Net periodic benefit costs (income)	$	75.5	$	29.2	$	34.8	$	(0.4)	$	(1.4)	$	0.8