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REGULATORY MATTERS - Ohio (Details) - PUCO meter in Thousands, $ in Thousands	May 31, 2024 USD ($)	Apr. 12, 2024 USD ($) meter	Apr. 05, 2023	Jul. 15, 2022 USD ($) meter circuit	Jun. 01, 2016 USD ($)	May 15, 2024 USD ($)	Sep. 13, 2021 requirement	Aug. 06, 2021 USD ($)
The Ohio Companies | Minimum
Regulatory Matters [Line Items]
Approved period of rate plan			8 years
ESP V | The Ohio Companies
Regulatory Matters [Line Items]
Approved bill assistance contribution amount						$ 32,500
OHIO
Regulatory Matters [Line Items]
Proposed goal to reduce CO2 pollution (percent)					90.00%
OHIO | Energy Conservation, Economic Development and Job Retention
Regulatory Matters [Line Items]
Contribution amount					$ 51,000
OHIO | Delivery Capital Recovery Rider
Regulatory Matters [Line Items]
Annual revenue cap for rider for years three through six					$ 15,000
OHIO | Delivery Capital Recovery Rider | Distribution Segment | CEI
Regulatory Matters [Line Items]
Approved ROE	10.80%
Capital structure, debt	44.00%
Capital structure, equity	56.00%
OHIO | Delivery Capital Recovery Rider | Distribution Segment | TE
Regulatory Matters [Line Items]
Capital structure, debt	45.00%
Capital structure, equity	55.00%
OHIO | Delivery Capital Recovery Rider | Distribution Segment | OE
Regulatory Matters [Line Items]
Capital structure, debt	46.00%
Capital structure, equity	54.00%
OHIO | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | Distribution Segment | CEI
Regulatory Matters [Line Items]
Increase base distribution rate	$ 94,000
OHIO | Phase Two of Grid Modernization Plan | The Ohio Companies
Regulatory Matters [Line Items]
Numbers of additional meters to be installed | meter		1,400		700
Number of circuits additional automation equipment to be installed on | circuit				240
Number of circuits additional voltage regulating equipment to be installed on | circuit				220
Period of grid modernization plan		4 years		4 years
Requested amount of capital investments		$ 421,000		$ 626,000
Requested amount of operations and maintenance expenses				$ 144,000
OHIO | Rider DCR Audit Report | The Ohio Companies
Regulatory Matters [Line Items]
Refund to customer of pole attachment sates								$ 15
Number of requirements with minor non-compliance | requirement							8
Number of requirements | requirement							23

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