CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands		Total	APS	Common Stock	Common Stock APS	Treasury Stock	Retained Earnings	Retained Earnings APS	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) APS	Noncontrolling Interests	Noncontrolling Interests APS
Beginning balance (in shares) at Dec. 31, 2023				113,537,689	71,264,947
Beginning balance at Dec. 31, 2023		$ 6,284,862	$ 7,349,136	$ 2,752,676	$ 178,162	$ (8,185)	$ 3,466,317	$ 3,759,299	$ (33,144)	$ (17,219)	$ 107,198	$ 107,198
Beginning balance (in shares) at Dec. 31, 2023						(113,272)
Increase (Decrease) in Shareholders' Equity
Net income		229,279	235,530				220,667	226,918			8,612	8,612
Other comprehensive income (loss)		(150)	183						(150)	183
Dividends on common stock		(199,868)	(199,900)				(199,868)	(199,900)
Issuance of common stock (in shares)	[1]			174,074
Issuance of common stock	[1]	11,835		$ 11,835
Purchase of treasury stock (in shares)	[2]					(71,008)
Purchase of treasury stock	[2]	(4,907)				$ (4,907)
Reissuance of treasury stock for stock-based compensation and other (in shares)						82,639
Reissuance of treasury stock for stock-based compensation and other		5,900				$ 5,900
Capital activities by noncontrolling interests		(10,628)	(10,628)								(10,628)	(10,628)
Other		(1)	(1)			1	(3)	(2)			1	1
Ending balance (in shares) at Jun. 30, 2024				113,711,763	71,264,947
Ending balance at Jun. 30, 2024		6,316,322	7,824,320	$ 2,764,511	$ 178,162	$ (7,191)	3,487,113	3,786,315	(33,294)	(17,036)	105,183	105,183
Ending balance (in shares) at Jun. 30, 2024						(101,641)
Beginning balance (in shares) at Mar. 31, 2024				113,686,849	71,264,947
Beginning balance at Mar. 31, 2024		6,310,533	7,369,047	$ 2,757,506	$ 178,162	$ (9,073)	3,483,178	3,774,414	(32,582)	(16,729)	111,504	111,504
Beginning balance (in shares) at Mar. 31, 2024						(128,234)
Increase (Decrease) in Shareholders' Equity
Net income		208,111	216,107				203,805	211,801			4,306	4,306
Other comprehensive income (loss)		(712)	(307)						(712)	(307)
Dividends on common stock		(199,868)	(199,900)				(199,868)	(199,900)
Issuance of common stock (in shares)	[3]			24,914
Issuance of common stock	[3]	7,005		$ 7,005
Reissuance of treasury stock for stock-based compensation and other (in shares)						26,593
Reissuance of treasury stock for stock-based compensation and other		1,882				$ 1,882
Capital activities by noncontrolling interests		(10,628)	(10,628)								(10,628)	(10,628)
Other		(1)	1				(2)				1	1
Ending balance (in shares) at Jun. 30, 2024				113,711,763	71,264,947
Ending balance at Jun. 30, 2024		$ 6,316,322	7,824,320	$ 2,764,511	$ 178,162	$ (7,191)	3,487,113	3,786,315	(33,294)	(17,036)	105,183	105,183
Ending balance (in shares) at Jun. 30, 2024						(101,641)
Beginning balance (in shares) at Dec. 31, 2024		119,143,782		119,143,782	71,264,947
Beginning balance at Dec. 31, 2024		$ 6,857,478	8,376,332	$ 3,121,617	$ 178,162	$ (3,323)	3,666,959	3,992,423	(30,942)	(14,116)	103,167	103,167
Beginning balance (in shares) at Dec. 31, 2024		(46,968)				(46,968)
Increase (Decrease) in Shareholders' Equity
Net income		$ 196,532	212,989				187,920	204,377			8,612	8,612
Other comprehensive income (loss)		501	270						501	270
Dividends on common stock		(213,731)	(213,600)				(213,731)	(213,600)
Issuance of common stock (in shares)	[1]			329,157
Issuance of common stock	[1]	(2,213)		$ (2,213)
Capital activities by noncontrolling interests		(10,628)	(10,628)								(10,628)	(10,628)
Other		$ 1	3					2			1	1
Ending balance (in shares) at Jun. 30, 2025		119,472,939		119,472,939	71,264,947
Ending balance at Jun. 30, 2025		$ 6,827,940	8,665,366	$ 3,119,404	$ 178,162	$ (3,323)	3,641,148	3,983,202	(30,441)	(13,846)	101,152	101,152
Ending balance (in shares) at Jun. 30, 2025		(46,968)				(46,968)
Beginning balance (in shares) at Mar. 31, 2025				119,445,299	71,264,947
Beginning balance at Mar. 31, 2025		$ 6,845,982	8,381,322	$ 3,109,612	$ 178,162	$ (3,323)	3,662,313	3,992,700	(30,094)	(13,710)	107,474	107,474
Beginning balance (in shares) at Mar. 31, 2025						(46,968)
Increase (Decrease) in Shareholders' Equity
Net income		196,870	208,404				192,564	204,098			4,306	4,306
Other comprehensive income (loss)		(347)	(136)						(347)	(136)
Dividends on common stock		(213,731)	(213,600)				(213,731)	(213,600)
Issuance of common stock (in shares)	[3]			27,640
Issuance of common stock	[3]	9,792		$ 9,792
Capital activities by noncontrolling interests		(10,628)	(10,628)								(10,628)	(10,628)
Other		$ 2	4				2	4
Ending balance (in shares) at Jun. 30, 2025		119,472,939		119,472,939	71,264,947
Ending balance at Jun. 30, 2025		$ 6,827,940	$ 8,665,366	$ 3,119,404	$ 178,162	$ (3,323)	$ 3,641,148	$ 3,983,202	$ (30,441)	$ (13,846)	$ 101,152	$ 101,152
Ending balance (in shares) at Jun. 30, 2025		(46,968)				(46,968)

[1] See Note 12 for information related to our equity forward sale agreements.

[2] Primarily represents shares of common stock withheld from certain stock awards for tax purposes.

[3] See Note 12 for information related to our equity forward sale agreements.