CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Operating Revenues	$ 4,118,355	$ 3,332,575
Operating Expenses:
Purchased Power, Purchased Natural Gas and Transmission	1,340,337	1,235,956
Operations and Maintenance	487,451	462,964
Depreciation	379,579	339,914
Amortization	455,449	(2,325)
Energy Efficiency Programs	257,550	213,479
Taxes Other Than Income Taxes	271,595	236,614
Total Operating Expenses	3,191,961	2,486,602
Operating Income/(Loss)	926,394	845,973
Interest Expense	300,849	250,749
Other Income, Net	92,344	91,030
Income Before Income Tax Expense	717,889	686,254
Income Tax Expense	165,221	162,526
Net Income	552,668	523,728
Net Income Attributable to Noncontrolling Interests	1,880	1,880
Net Income Attributable to Common Shareholders	$ 550,788	$ 521,848
Basic (Loss)/Earnings Per Common Share (in dollars per share)	$ 1.50	$ 1.49
Diluted (Loss)/Earnings Per Common Share (in dollars per share)	$ 1.50	$ 1.49
Weighted Average Common Shares Outstanding:
Basic (in shares)	367,320,246	350,717,114
Diluted (in shares)	367,677,618	350,997,220