Common Equity - Common Stock Issued and Repurchased (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Aug. 06, 2024
Stockholders' Equity Note [Abstract]
New shares of common stock issued		0	0
Capital Unit [Line Items]
Shares issued - At-the-market offering program	1,030,674
Proceeds from issuance of common stock, net	$ 163.4	$ 0.0	$ 0.0
Roll Forward of Common Stock Outstanding
Common Stock, Shares, Outstanding, Beginning Balance	315,434,531
Shares issued - At-the-market offering program	1,030,674
Shares issued - Stock-based compensation	455,474
Shares issued - 401(k)	336,800
Shares issued - Stock investment plan	423,376
Common Stock, Shares, Outstanding, Ending Balance	317,680,855	315,434,531
Shares purchased
Shares purchased	23,292	182,795	687,416
Cost of shares purchased	$ 3.2	$ 16.6	$ 69.2
At-the-market program offering
Capital Unit [Line Items]
Maximum aggregate sales of common stock through ATM Program				$ 1,500.0
Shares issued - At-the-market offering program	1,030,674
Proceeds from issuance of common stock, net	$ 98.3
Payments of Stock Issuance Costs	$ 1.7
Roll Forward of Common Stock Outstanding
Shares issued - At-the-market offering program	1,030,674