Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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LONG-TERM DEBT (Details) - USD ($) $ in Millions	Dec. 31, 2023	Nov. 30, 2023	May 31, 2023	Apr. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Interest rate	5.06%
Current maturities of long-term debt	$ (800.0)					$ (439.1)
Unamortized debt discount and debt issuance costs	(106.0)					(79.6)
Total excluding current maturities	$ 11,053.3					9,905.7
Convertible Notes Due 2027
Debt Instrument [Line Items]
Interest rate	4.50%
Long-term debt gross	$ 1,400.0
Fair Value adjustment
Debt Instrument [Line Items]
Long-term debt gross	$ 87.0					92.1
Current maturities of long-term debt						$ 0.4
Mortgage Bonds \| Mortgage Bonds Due 2025 EKC
Debt Instrument [Line Items]
Interest rate	3.25%					3.25%
Long-term debt gross	$ 250.0					$ 250.0
Mortgage Bonds \| Mortgage Bonds Due 2026 EKC
Debt Instrument [Line Items]
Interest rate	2.55%					2.55%
Long-term debt gross	$ 350.0					$ 350.0
Mortgage Bonds \| Mortgage Bonds Due 2027 EKC
Debt Instrument [Line Items]
Interest rate	3.10%					3.10%
Long-term debt gross	$ 300.0					$ 300.0
Mortgage Bonds \| Mortgage Bonds Due 2033 EKC
Debt Instrument [Line Items]
Interest rate	5.90%
Long-term debt gross	$ 300.0
Mortgage Bonds \| Mortgage Bonds Due 2042 EKC
Debt Instrument [Line Items]
Interest rate	4.125%					4.125%
Long-term debt gross	$ 550.0					$ 550.0
Mortgage Bonds \| Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Interest rate	4.10%					4.10%
Long-term debt gross	$ 430.0					$ 430.0
Mortgage Bonds \| Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Interest rate	4.625%					4.625%
Long-term debt gross	$ 250.0					$ 250.0
Mortgage Bonds \| Mortgage Bonds Due 2045 EKC
Debt Instrument [Line Items]
Interest rate	4.25%					4.25%
Long-term debt gross	$ 300.0					$ 300.0
Mortgage Bonds \| Mortgage Bonds Due 2049 EKC
Debt Instrument [Line Items]
Interest rate	3.25%					3.25%
Long-term debt gross	$ 300.0					$ 300.0
Mortgage Bonds \| Mortgage Bonds Due 2050 EKC
Debt Instrument [Line Items]
Interest rate	3.45%					3.45%
Long-term debt gross	$ 500.0					$ 500.0
Mortgage Bonds \| Mortgage Bonds Due 2053 EKC
Debt Instrument [Line Items]
Interest rate	5.70%
Long-term debt gross	$ 400.0
Mortgage Bonds \| Mortgage Bonds Due 2023 EKS
Debt Instrument [Line Items]
Interest rate						6.15%
Long-term debt gross						$ 50.0
Mortgage Bonds \| Mortgage Bonds Due 2037 EKS
Debt Instrument [Line Items]
Interest rate	6.53%					6.53%
Long-term debt gross	$ 175.0					$ 175.0
Mortgage Bonds \| Mortgage Bonds Due 2038 EKS
Debt Instrument [Line Items]
Interest rate	6.64%					6.64%
Long-term debt gross	$ 100.0					$ 100.0
Mortgage Bonds \| Mortgage Bonds Due 2044 EKS
Debt Instrument [Line Items]
Interest rate	4.30%					4.30%
Long-term debt gross	$ 250.0					$ 250.0
Mortgage Bonds \| EIRR Bonds Due 2026 EM
Debt Instrument [Line Items]
Interest rate	4.30%
Long-term debt gross	$ 79.5
Mortgage Bonds \| Mortgage Bonds Due 2023 EM
Debt Instrument [Line Items]
Interest rate						2.95%
Long-term debt gross						$ 79.5
Mortgage Bonds \| Mortgage Bonds Due 2030 EM
Debt Instrument [Line Items]
Interest rate	2.25%					2.25%
Long-term debt gross	$ 400.0					$ 400.0
Mortgage Bonds \| Mortgage Bonds Due 2033 EM
Debt Instrument [Line Items]
Interest rate	4.95%
Long-term debt gross	$ 300.0
Mortgage Bonds \| Mortgage Bonds Due 2049 EM
Debt Instrument [Line Items]
Interest rate	4.125%					4.125%
Long-term debt gross	$ 400.0					$ 400.0
Mortgage Bonds \| Mortgage Bonds Due 2027 EM
Debt Instrument [Line Items]
Interest rate	515.00%					5.15%
Long-term debt gross	$ 300.0					$ 300.0
Mortgage Bonds \| Mortgage Bonds Due 2032 EMW
Debt Instrument [Line Items]
Interest rate	3.75%					3.75%
Long-term debt gross	$ 250.0					$ 250.0
Pollution Control Bonds \| Pollution Control Bonds Due 2032A EKC
Debt Instrument [Line Items]
Interest rate	3.66%					3.54%
Long-term debt gross	$ 45.0					$ 45.0
Pollution Control Bonds \| Pollution Control Bonds Due 2032B EKC
Debt Instrument [Line Items]
Interest rate	3.66%					3.54%
Long-term debt gross	$ 30.5					$ 30.5
Pollution Control Bonds \| Pollution Control Bonds Due 2027 EKS
Debt Instrument [Line Items]
Interest rate	3.66%					3.54%
Long-term debt gross	$ 21.9					$ 21.9
Pollution Control Bonds \| Pollution Control Bonds Due 2031 EKS
Debt Instrument [Line Items]
Interest rate	2.50%					2.50%
Long-term debt gross	$ 50.0					$ 50.0
Pollution Control Bonds \| Pollution Control Bonds Due 2032A EKS
Debt Instrument [Line Items]
Interest rate	3.66%					3.54%
Long-term debt gross	$ 14.5					$ 14.5
Pollution Control Bonds \| Pollution Control Bonds Due 2032B EKS
Debt Instrument [Line Items]
Interest rate	3.66%					3.54%
Long-term debt gross	$ 10.0					$ 10.0
Pollution Control Bonds \| EIRR Bonds Series 2007A and 2007B due 2035 EM
Debt Instrument [Line Items]
Interest rate	3.83%					3.287%
Long-term debt gross	$ 146.5					$ 146.5
Pollution Control Bonds \| EIRR Bonds Series 2007A and 2007B due 2038 EM
Debt Instrument [Line Items]
Interest rate	3.50%					3.50%
Long-term debt gross	$ 23.4					$ 23.4
Senior Notes \| Series Notes Due 2023 EM
Debt Instrument [Line Items]
Interest rate						3.15%
Long-term debt gross						$ 300.0
Senior Notes \| Senior Notes Due 2025 EM
Debt Instrument [Line Items]
Interest rate	3.65%					3.65%
Long-term debt gross	$ 350.0					$ 350.0
Senior Notes \| Senior Notes Due 2035 EM
Debt Instrument [Line Items]
Interest rate	6.05%					6.05%
Long-term debt gross	$ 250.0					$ 250.0
Senior Notes \| Senior Notes Due 2035A EM
Debt Instrument [Line Items]
Interest rate	5.78%					5.78%
Senior Notes \| Senior Notes Due 2041 EM
Debt Instrument [Line Items]
Interest rate	5.30%					5.30%
Long-term debt gross	$ 400.0					$ 400.0
Senior Notes \| Senior Notes Due 2047 EM
Debt Instrument [Line Items]
Interest rate	4.20%					4.20%
Long-term debt gross	$ 300.0					$ 300.0
Senior Notes \| Senior Notes Due 2048 EM
Debt Instrument [Line Items]
Interest rate	4.20%					4.20%
Long-term debt gross	$ 300.0					$ 300.0
Senior Notes \| Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Interest rate	3.49%					3.49%
Long-term debt gross	$ 36.0					$ 36.0
Senior Notes \| Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Interest rate	4.06%					4.06%
Long-term debt gross	$ 60.0					$ 60.0
Senior Notes \| Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Interest rate	4.74%					4.74%
Long-term debt gross	$ 150.0					$ 150.0
Senior Notes \| Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Interest rate	2.86%					2.86%
Long-term debt gross	$ 350.0					$ 350.0
Senior Notes \| Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Interest rate	3.01%					3.01%
Long-term debt gross	$ 75.0					$ 75.0
Senior Notes \| Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Interest rate	3.21%					3.21%
Long-term debt gross	$ 75.0					$ 75.0
Senior Notes \| Senior Notes Due 2024
Debt Instrument [Line Items]
Interest rate	2.45%					2.45%
Long-term debt gross	$ 800.0					$ 800.0
Senior Notes \| Senior Notes Due 2029
Debt Instrument [Line Items]
Interest rate	2.90%					2.90%
Long-term debt gross	$ 800.0					$ 800.0
Senior Notes \| Senior Notes Due 2029A
Debt Instrument [Line Items]
Interest rate	3.77%					3.77%
Medium Term Notes \| Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Interest rate						7.33%
Long-term debt gross						$ 3.0
Medium Term Notes \| Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Interest rate						7.17%
Long-term debt gross						$ 7.0
Term Loan Facility \| Line Of Credit Facility Classified As Long Term Debt 2023
Debt Instrument [Line Items]
Long-term debt gross	$ 500.0					500.0
Convertible Notes Payable \| Convertible Notes Due 2027
Debt Instrument [Line Items]
Interest rate	4.50%
Long-term debt gross	$ 1,400.0
Evergy Kansas Central
Debt Instrument [Line Items]
Current maturities of long-term debt	0.0					(50.0)
Unamortized debt discount and debt issuance costs	(46.5)					(40.0)
Total excluding current maturities	4,580.4					3,886.9
Evergy Kansas Central \| Fair Value adjustment
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2025 EKC
Debt Instrument [Line Items]
Long-term debt gross	250.0					250.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2026 EKC
Debt Instrument [Line Items]
Long-term debt gross	350.0					350.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2027 EKC
Debt Instrument [Line Items]
Long-term debt gross	300.0					300.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2033 EKC
Debt Instrument [Line Items]
Interest rate		5.90%
Long-term debt gross	300.0	$ 300.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2042 EKC
Debt Instrument [Line Items]
Long-term debt gross	550.0					550.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	430.0					430.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	250.0					250.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2045 EKC
Debt Instrument [Line Items]
Long-term debt gross	300.0					300.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2049 EKC
Debt Instrument [Line Items]
Long-term debt gross	300.0					300.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2050 EKC
Debt Instrument [Line Items]
Long-term debt gross	500.0					500.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2053 EKC
Debt Instrument [Line Items]
Interest rate					5.70%
Long-term debt gross	400.0				$ 400.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2023 EKS
Debt Instrument [Line Items]
Interest rate			6.15%
Long-term debt gross			$ 50.0			50.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2037 EKS
Debt Instrument [Line Items]
Long-term debt gross	175.0					175.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2038 EKS
Debt Instrument [Line Items]
Long-term debt gross	100.0					100.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2044 EKS
Debt Instrument [Line Items]
Long-term debt gross	250.0					250.0
Evergy Kansas Central \| Mortgage Bonds \| EIRR Bonds Due 2026 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2030 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2033 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2049 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2027 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Mortgage Bonds \| Mortgage Bonds Due 2032 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Pollution Control Bonds \| Pollution Control Bonds Due 2032A EKC
Debt Instrument [Line Items]
Long-term debt gross	45.0					45.0
Evergy Kansas Central \| Pollution Control Bonds \| Pollution Control Bonds Due 2032B EKC
Debt Instrument [Line Items]
Long-term debt gross	30.5					30.5
Evergy Kansas Central \| Pollution Control Bonds \| Pollution Control Bonds Due 2027 EKS
Debt Instrument [Line Items]
Long-term debt gross	21.9					21.9
Evergy Kansas Central \| Pollution Control Bonds \| Pollution Control Bonds Due 2031 EKS
Debt Instrument [Line Items]
Long-term debt gross	50.0					50.0
Evergy Kansas Central \| Pollution Control Bonds \| Pollution Control Bonds Due 2032A EKS
Debt Instrument [Line Items]
Long-term debt gross	14.5					14.5
Evergy Kansas Central \| Pollution Control Bonds \| Pollution Control Bonds Due 2032B EKS
Debt Instrument [Line Items]
Long-term debt gross	10.0					10.0
Evergy Kansas Central \| Pollution Control Bonds \| EIRR Bonds Series 2007A and 2007B due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Pollution Control Bonds \| EIRR Bonds Series 2007A and 2007B due 2038 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Series Notes Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2025 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2041 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2047 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2048 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Senior Notes \| Senior Notes Due 2029
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Kansas Central \| Medium Term Notes \| Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Kansas Central \| Medium Term Notes \| Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Kansas Central \| Term Loan Facility \| Line Of Credit Facility Classified As Long Term Debt 2023
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Kansas Central \| Convertible Notes Payable \| Convertible Notes Due 2027
Debt Instrument [Line Items]
Long-term debt gross	0.0
Evergy Metro
Debt Instrument [Line Items]
Current maturities of long-term debt	0.0					(379.5)
Unamortized debt discount and debt issuance costs	(25.0)					(22.8)
Total excluding current maturities	2,924.4					2,547.1
Evergy Metro \| Fair Value adjustment
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2025 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2026 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2027 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2033 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2042 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2045 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2049 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2050 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2053 EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2023 EKS
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2037 EKS
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2038 EKS
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2044 EKS
Debt Instrument [Line Items]
Long-term debt gross	$ 0.0					0.0
Evergy Metro \| Mortgage Bonds \| EIRR Bonds Due 2026 EM
Debt Instrument [Line Items]
Interest rate	4.30%
Long-term debt gross	$ 79.5
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2023 EM
Debt Instrument [Line Items]
Interest rate	2.95%
Long-term debt gross	$ 79.5					79.5
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2030 EM
Debt Instrument [Line Items]
Long-term debt gross	400.0					400.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2033 EM
Debt Instrument [Line Items]
Interest rate				4.95%
Long-term debt gross	300.0			$ 300.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2049 EM
Debt Instrument [Line Items]
Long-term debt gross	400.0					400.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2027 EM
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| Mortgage Bonds Due 2032 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Mortgage Bonds \| General Mortgage Bonds EIRR Series 2005
Debt Instrument [Line Items]
Long-term debt gross	50.0					21.9
Evergy Metro \| Pollution Control Bonds \| Pollution Control Bonds Due 2032A EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Pollution Control Bonds \| Pollution Control Bonds Due 2032B EKC
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Pollution Control Bonds \| Pollution Control Bonds Due 2027 EKS
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Pollution Control Bonds \| Pollution Control Bonds Due 2031 EKS
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Pollution Control Bonds \| Pollution Control Bonds Due 2032A EKS
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Pollution Control Bonds \| Pollution Control Bonds Due 2032B EKS
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Pollution Control Bonds \| EIRR Bonds Series 2007A and 2007B due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	146.5					146.5
Evergy Metro \| Pollution Control Bonds \| EIRR Bonds Series 2007A and 2007B due 2038 EM
Debt Instrument [Line Items]
Long-term debt gross	23.4					23.4
Evergy Metro \| Senior Notes \| Series Notes Due 2023 EM
Debt Instrument [Line Items]
Interest rate					3.15%
Long-term debt gross					$ 300.0	300.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2025 EM
Debt Instrument [Line Items]
Long-term debt gross	350.0					350.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	250.0					250.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2041 EM
Debt Instrument [Line Items]
Long-term debt gross	400.0					400.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2047 EM
Debt Instrument [Line Items]
Long-term debt gross	300.0					300.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2048 EM
Debt Instrument [Line Items]
Long-term debt gross	300.0					300.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Senior Notes \| Senior Notes Due 2029
Debt Instrument [Line Items]
Long-term debt gross	0.0					0.0
Evergy Metro \| Medium Term Notes \| Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Metro \| Medium Term Notes \| Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross						0.0
Evergy Metro \| Term Loan Facility \| Line Of Credit Facility Classified As Long Term Debt 2023
Debt Instrument [Line Items]
Long-term debt gross						$ 0.0
Evergy Metro \| Convertible Notes Payable \| Convertible Notes Due 2027
Debt Instrument [Line Items]
Long-term debt gross	$ 0.0