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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Depreciation rates average	3.00%
Minimum
Property, Plant and Equipment [Line Items]
Generating facilities	5 years
Transmission facilities	27 years
Distribution facilities	10 years
Other	5 years
Maximum
Property, Plant and Equipment [Line Items]
Generating facilities	66 years
Transmission facilities	66 years
Distribution facilities	63 years
Other	57 years
Evergy Kansas Central | Minimum
Property, Plant and Equipment [Line Items]
Generating facilities	5 years
Transmission facilities	29 years
Distribution facilities	13 years
Other	5 years
Evergy Kansas Central | Maximum
Property, Plant and Equipment [Line Items]
Generating facilities	66 years
Transmission facilities	63 years
Distribution facilities	61 years
Other	57 years
Evergy Metro | Minimum
Property, Plant and Equipment [Line Items]
Generating facilities	7 years
Transmission facilities	27 years
Distribution facilities	10 years
Other	8 years
Evergy Metro | Maximum
Property, Plant and Equipment [Line Items]
Generating facilities	58 years
Transmission facilities	64 years
Distribution facilities	54 years
Other	37 years

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Composite depreciation rate for public utility plants in service.

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Useful life of utility distribution assets owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Useful life of utility generation assets owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Useful life of other property, plant and equipment (PPE) owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Useful life of utility transmission equipment owned by public utility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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