REGULATORY MATTERS - Ohio (Details) - Ohio - PUCO meter in Thousands, $ in Thousands				3 Months Ended
	Jul. 15, 2022 USD ($) meter circuit	Nov. 01, 2021 USD ($)	Jun. 01, 2016 USD ($)	Dec. 31, 2021 USD ($)	Sep. 13, 2021 requirement	Aug. 06, 2021 USD ($)
Regulatory Matters [Line Items]
Proposed reduction in power plants carbon pollution (percent)			90.00%
DCR Rider
Regulatory Matters [Line Items]
Revenue cap for Rider for years 3-6			$ 20,000
Revenue cap for Rider for years 6-8			15,000
Ohio Stipulation
Regulatory Matters [Line Items]
Rate refunds		$ 210,000
Rate refund in 2022		80,000
Rate refund in 2023		60,000
Rate refund in 2024		45,000
Rate refund in 2025		25,000
Ohio Stipulation | Regulated Distribution
Regulatory Matters [Line Items]
Pre-tax charges				$ 96,000
Energy Conservation, Economic Development and Job Retention
Regulatory Matters [Line Items]
Contribution amount			$ 51,000
Ohio Companies | Rider Delivery Capital Recovery Audit Report
Regulatory Matters [Line Items]
Refund to customer of pole attachment rates						$ 15
Number of minor non-compliance with requirements | requirement					8
Number of requirements were in compliance | requirement					23
Ohio Companies | SEET 2017-2019 Cases
Regulatory Matters [Line Items]
Rate refunds		$ 96,000
Ohio Companies | Phase Two of Grid Modernization Plan
Regulatory Matters [Line Items]
Numbers of additional meters to be installed | meter	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
Requested amount of capital investments	$ 626,000
Requested amount of operations and maintenance expenses	$ 144,000