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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

RATE MATTERS - FERC Annual Revenue Requirements (Details) - USD ($) $ in Millions	12 Months Ended					60 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2025
Public Utilities, General Disclosures [Line Items]
Stand alone treatment of nolcs annual revenue increase						$ 308
FERC 2021 PJM and SPP Transmission Formula Rate Challenge
Public Utilities, General Disclosures [Line Items]
Stand alone treatment of nolcs annual revenue increase	$ 49	$ 52	$ 61	$ 68	$ 78