Acquisitions - Sapphire Sky (Details) $ in Millions	1 Months Ended
	Feb. 28, 2023 USD ($) MW	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Asset Acquisition - Allocation of Purchase Price to Assets acquired, Liabilities assumed, less Noncontrolling Interest
Net property, plant, and equipment		$ 31,581.5	$ 29,113.8
Other long-term assets		383.1	427.3
Other long-term liabilities		$ (26,753.4)	$ (25,644.5)
Sapphire Sky | WECI
Asset Acquisition
Ownership interest in generating facility acquired	90.00%
Capacity of generation unit | MW	250
Total purchase price	$ 442.6
Duration of offtake agreement for the sale of energy produced	12 years
Asset Acquisition - Allocation of Purchase Price to Assets acquired, Liabilities assumed, less Noncontrolling Interest
Accounts receivable	$ 0.8
Net property, plant, and equipment	642.6
Other long-term assets	1.4
Accounts payable	(1.0)
Other long-term liabilities	(152.0)
Noncontrolling interest	(49.2)
Total purchase price	$ 442.6