CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands		Total	Common Stock	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	ARIZONA PUBLIC SERVICE COMPANY	ARIZONA PUBLIC SERVICE COMPANY Common Stock	ARIZONA PUBLIC SERVICE COMPANY Additional Paid-In Capital	ARIZONA PUBLIC SERVICE COMPANY Retained Earnings	ARIZONA PUBLIC SERVICE COMPANY Accumulated Other Comprehensive Income (Loss)	ARIZONA PUBLIC SERVICE COMPANY Noncontrolling Interests
Beginning balance at Dec. 31, 2013		$ 4,340,460	$ 2,491,558	$ (4,308)	$ 1,785,273	$ (78,053)	$ 145,990	$ 4,454,874	$ 178,162	$ 2,379,696	$ 1,804,398	$ (53,372)	$ 145,990
Beginning Balance (in shares) at Dec. 31, 2013			110,280,703	98,944					71,264,947
Increase (Decrease) in Shareholders' Equity
Net income		423,696			397,595		26,101	447,320			421,219		26,101
Other comprehensive income		9,912				9,912		5,039				5,039
Dividends on common stock		(256,803)			(256,803)			(256,900)			(256,900)
Other								1			1
Issuance of common stock		21,412	$ 21,412
Issuance of common stock (in shares)			369,059
Purchase of treasury stock	[1]	(7,893)		$ (7,893)
Purchase of treasury stock (in shares)	[1]			(139,746)
Reissuance of treasury stock for stock-based compensation and other		8,800		$ 8,800
Reissuance of treasury stock for stock-based compensation and other (in shares)				160,290
Net capital activities by noncontrolling interests		(20,482)					(20,482)	(20,482)					(20,482)
Ending balance at Dec. 31, 2014		4,519,102	$ 2,512,970	$ (3,401)	1,926,065	(68,141)	151,609	4,629,852	$ 178,162	2,379,696	1,968,718	(48,333)	151,609
Ending Balance (in shares) at Dec. 31, 2014			110,649,762	78,400					71,264,947
Increase (Decrease) in Shareholders' Equity
Net income		456,190			437,257		18,933	469,207			450,274		18,933
Other comprehensive income		23,393				23,393		21,236				21,236
Dividends on common stock		(270,519)			(270,519)			(270,500)			(270,500)
Other								1			1
Issuance of common stock		28,698	$ 28,698
Issuance of common stock (in shares)			445,640
Purchase of treasury stock	[1]	(10,136)		$ (10,136)
Purchase of treasury stock (in shares)	[1]			(154,751)
Reissuance of treasury stock for stock-based compensation and other		7,731		$ 7,731
Reissuance of treasury stock for stock-based compensation and other (in shares)				118,121
Net capital activities by noncontrolling interests		(35,002)					(35,002)	(35,002)					(35,002)
Ending balance at Dec. 31, 2015		$ 4,719,457	$ 2,541,668	$ (5,806)	2,092,803	(44,748)	135,540	4,814,794	$ 178,162	2,379,696	2,148,493	(27,097)	135,540
Ending Balance (in shares) at Dec. 31, 2015		111,095,402	111,095,402	115,030					71,264,947
Increase (Decrease) in Shareholders' Equity
Stock compensation cumulative effect adjustments		$ 45,855	$ 40,380		5,475			5,411			5,411
Net income		461,527			442,034		19,493	481,634			462,141		19,493
Other comprehensive income		926				926		1,674				1,674
Dividends on common stock		(284,765)			(284,765)			(284,800)			(284,800)
Issuance of common stock		13,982	$ 13,982
Issuance of common stock (in shares)			296,651
Purchase of treasury stock	[1]	(9,087)		$ (9,087)
Purchase of treasury stock (in shares)	[1]			(128,105)
Reissuance of treasury stock for stock-based compensation and other		10,760		$ 10,760
Equity infusion from Pinnacle West								42,000		42,000
Reissuance of treasury stock for stock-based compensation and other (in shares)				187,818
Net capital activities by noncontrolling interests		(22,743)					(22,743)	(22,743)					(22,743)
Ending balance at Dec. 31, 2016		$ 4,935,912	$ 2,596,030	$ (4,133)	$ 2,255,547	$ (43,822)	$ 132,290	$ 5,037,970	$ 178,162	$ 2,421,696	$ 2,331,245	$ (25,423)	$ 132,290
Ending Balance (in shares) at Dec. 31, 2016		111,392,053	111,392,053	55,317					71,264,947

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