Jointly Owned Utility Facilities - EGTS (Details) $ in Millions	Dec. 31, 2022 USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Facility in service	$ 10,587
Accumulated depreciation	5,879
Construction work in progress	272
EGTS
Jointly Owned Utility Plant Interests [Line Items]
Facility in service	456
Accumulated depreciation	154
Construction work in progress	$ 8
Ellisburg Pool \| EGTS
Jointly Owned Utility Plant Interests [Line Items]
Ownership share	39.00%
Facility in service	$ 32
Accumulated depreciation	11
Construction work in progress	$ 0
Ellisburg Station \| EGTS
Jointly Owned Utility Plant Interests [Line Items]
Ownership share	50.00%
Facility in service	$ 26
Accumulated depreciation	8
Construction work in progress	$ 3
Harrison \| EGTS
Jointly Owned Utility Plant Interests [Line Items]
Ownership share	50.00%
Facility in service	$ 53
Accumulated depreciation	18
Construction work in progress	$ 0
Leidy \| EGTS
Jointly Owned Utility Plant Interests [Line Items]
Ownership share	50.00%
Facility in service	$ 143
Accumulated depreciation	47
Construction work in progress	$ 1
Oakford \| EGTS
Jointly Owned Utility Plant Interests [Line Items]
Ownership share	50.00%
Facility in service	$ 202
Accumulated depreciation	70
Construction work in progress	$ 4

The period end amount owned by the reporting utility of a jointly owned utility plant in service.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 10.C)
-URI https://asc.fasb.org/extlink&oid=122136288&loc=d3e659983-123033

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- Definition

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+ References

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- Definition

The period end amount of construction work in progress at a jointly owned electricity generation plant.

+ References

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- Definition

The period end amount of accumulated depreciation in a jointly owned electricity generation plant.

+ References

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- Definition

The proportionate share of interest (percent) in a jointly owned utility plant.

+ References

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