FINANCING ACTIVITIES - Schedule of Long-Term Debt Information (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total Long-term Debt Outstanding	$ 42,989.8	$ 42,642.8
Long-term Debt Due Within One Year	4,178.9	3,335.0
Long-term Debt	38,810.9	39,307.8
Trust fund assets one time fee obligation for nuclear fuel disposition	369.0	367.0
Senior Unsecured Notes
Debt Instrument [Line Items]
Senior Unsecured Notes	36,243.9	36,410.9
Pollution Control Bonds
Debt Instrument [Line Items]
Pollution Control Bonds	1,772.0	1,771.3
Notes Payable
Debt Instrument [Line Items]
Notes Payable	583.5	609.9
Securitization Bonds
Debt Instrument [Line Items]
Securitization Bonds	551.7	578.0
Spent Nuclear Fuel Obligation
Debt Instrument [Line Items]
Spent Nuclear Fuel Obligation	319.7	316.3
Junior Subordinated Notes
Debt Instrument [Line Items]
Junior Subordinated Notes	2,580.1	2,579.1
Other Long-term Debt
Debt Instrument [Line Items]
Other Long-term Debt	$ 938.9	$ 377.3

Trust fund assets one time fee obligation for nuclear fuel disposition.

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