RATE MATTERS - I&M Rate Matters (Details) - I&M - USD ($) $ in Thousands	1 Months Ended
	Oct. 29, 2025	Jul. 30, 2025	Oct. 31, 2024	Jul. 31, 2025	Apr. 30, 2025	Jan. 31, 2025
Public Utilities, General Disclosures [Line Items]
Earning test, over-earning credit to customers, proposed				$ 35,000		$ 21,000
Earning test, over-earning credit to customers, approved					$ 21,000
2023 Michigan Power Supply Cost Recovery
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power		$ 3,000
2023 Michigan Power Supply Cost Recovery | Minimum
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power			$ 3,000
2023 Michigan Power Supply Cost Recovery | Maximum
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power			$ 15,000
2024 Michigan Power Supply Cost Recovery | Minimum | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power	$ 259
2024 Michigan Power Supply Cost Recovery | Maximum | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power	$ 14,000