JOINT VENTURE - Narrative (Details) $ in Millions		1 Months Ended		3 Months Ended
	Oct. 02, 2024 USD ($)	Mar. 31, 2023 MW	May 31, 2021 MW	Mar. 31, 2024 USD ($)	Oct. 31, 2024
Nautilus Joint Venture
JOINT VENTURE
Proceeds from Bitcoin distributions received				$ 12.0
Talen
JOINT VENTURE
Interest in joint venture (as a percent)			50.00%
Related Party | Nautilus Joint Venture
JOINT VENTURE
Maximum operating capacity (in MW) | MW		200
Ownership interest in the joint venture		25.00%			25.00%
Talen
JOINT VENTURE
Maximum operating capacity (in MW) | MW			300
Talen | Nautilus Joint Venture
JOINT VENTURE
Ownership interest in the joint venture	25.00%
Talen | Nautilus Joint Venture | Discontinued Operations, Disposed of by Sale
JOINT VENTURE
Consideration transferred	$ 102.1
Equity method investment, consideration transferred in cash	86.1
Equity method investment, distributed in bitcoin	0.3
Equity method investment, miners and equipment assigned	$ 15.7
Percent of net proceeds in excess	25.00%
Equity method investment, covenant, excess amount	$ 300.0
Equity method investment, derecognized investment	$ 79.5