CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Operating Revenues	$ 2,791,482	$ 3,215,645	$ 9,216,467	$ 9,259,596
Operating Expenses:
Purchased Power, Purchased Natural Gas and Transmission	1,168,599	1,388,041	4,232,912	3,718,278
Operations and Maintenance	500,711	454,289	1,382,563	1,378,897
Depreciation	329,528	302,143	962,477	885,711
Amortization	(143,979)	111,287	(438,460)	418,644
Energy Efficiency Programs	162,425	162,545	531,199	498,708
Taxes Other Than Income Taxes	243,645	240,047	704,989	683,441
Total Operating Expenses	2,260,929	2,658,352	7,375,680	7,583,679
Operating Income/(Loss)	530,553	557,293	1,840,787	1,675,917
Interest Expense	222,283	178,174	624,140	491,509
Impairment of Offshore Wind Investment	0	0	401,000	0
Other Income, Net	79,123	89,831	262,980	255,253
Income Before Income Tax Expense	387,393	468,950	1,078,627	1,439,661
Income Tax Expense	45,850	117,661	226,743	349,305
Net Income	341,543	351,289	851,884	1,090,356
Net Income Attributable to Noncontrolling Interests	1,880	1,880	5,639	5,639
Net Income Attributable to Common Shareholders	$ 339,663	$ 349,409	$ 846,245	$ 1,084,717
Basic EPS (in dollars per share)	$ 0.97	$ 1.01	$ 2.42	$ 3.13
Diluted EPS (in dollars per share)	$ 0.97	$ 1.00	$ 2.42	$ 3.13
Weighted Average Common Shares Outstanding:
Basic (in shares)	349,704,155	347,297,411	349,461,219	346,115,823
Diluted (in shares)	349,851,969	347,762,693	349,731,320	346,573,101