FINANCING ACTIVITIES - Common Stock Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2025	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Instrument [Line Items]
Issuance of Common Stock		$ 187.5	$ 513.0
ATM Offering Program
Debt Instrument [Line Items]
Issuance of Common Stock		0.0		$ 400.0
Capital shares reserved for future issuance, value		1,300.0
Forward Sales Agreement
Debt Instrument [Line Items]
Sale of stock, authorized amount (in shares)	22,549,020
Sale of stock, initial price per share (in dollars per share)	$ 102.00
Sale of stock, underwiring discount, per share (in dollars per share)	$ 2.244
Sale of stock, consideration to be received on transaction		$ 2,250.0