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Regulatory matters.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228

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Regulatory Matters - Ohio (Details) - OHIO - PUCO $ in Thousands			3 Months Ended
	Nov. 01, 2021 USD ($)	Jun. 01, 2016 USD ($)	Mar. 31, 2022 USD ($)	Sep. 13, 2021 requirement	Aug. 06, 2021 USD ($)
Regulatory Matters [Line Items]
Proposed goal to reduce CO2 pollution (percent)		90.00%
Energy Conservation, Economic Development and Job Retention
Regulatory Matters [Line Items]
Contribution amount		$ 51,000
Delivery Capital Recovery Rider
Regulatory Matters [Line Items]
Annual revenue cap for rider for years three through six		20,000
Annual revenue cap for rider for years six through eight		$ 15,000
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
SEET 2017-2019 Cases \| The Ohio Companies
Regulatory Matters [Line Items]
Rate refunds	$ 96,000
Ohio Stipulation
Regulatory Matters [Line Items]
Rate refunds	210,000
Rate refunds in 2022	80,000
Rate refunds in 2023	60,000
Rate refunds in 2024	45,000
Rate refunds in 2025	$ 25,000
Ohio Stipulation \| Regulated Distribution
Regulatory Matters [Line Items]
Pre-tax charges			$ 96,000