FAIR VALUE MEASUREMENTS - Schedule of Long Term Debt Redemption and Issuance (Details) - USD ($) $ in Millions	Mar. 31, 2023	Feb. 28, 2023	Jan. 31, 2023
ME | Promissory Notes | 3.50% Series B Senior Notes Due 2023
Debt Instrument [Line Items]
Issuance interest rate	3.50%
Face amount of debt	$ 300
ME | Promissory Notes | 3.50% Series B Senior Notes Due 2023 | Revolving Credit Facility
Debt Instrument [Line Items]
Issuance interest rate	3.50%
Face amount of debt	$ 300
ME | Promissory Notes | 5.20%, 425 Million Notes Maturing 2028
Debt Instrument [Line Items]
Issuance interest rate	5.20%
Face amount of debt	$ 425
WP | First Mortgage Bond | 5.29%, 50 Million Notes Maturing 2023
Debt Instrument [Line Items]
Issuance interest rate			5.29%
Face amount of debt			$ 50
MAIT | Promissory Notes | 5.39%, 175 Million Notes Maturing 2023
Debt Instrument [Line Items]
Issuance interest rate		5.39%
Face amount of debt		$ 175
PN | Promissory Notes | 5.15%, 300 Million Notes Maturing 2026
Debt Instrument [Line Items]
Issuance interest rate	5.15%
Face amount of debt	$ 300