Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Current tax expense (benefit)	$ (307.0)	$ (14.8)	$ 50.2
Deferred income taxes, net	538.7	229.9	278.5
ITCs	(9.7)	(10.5)	(5.8)
Total income tax expense	$ 222.0	$ 204.6	$ 322.9