CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - 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 (in shares) at Dec. 31, 2013			110,280,703	98,944					71,264,947
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
Increase (Decrease) in Shareholders' Equity
Net income		166,075			148,224		17,851	172,285			154,434		17,851
Other comprehensive income		3,836				3,836		3,972				3,972
Dividends on common stock		(125,265)			(125,265)			(125,200)			(125,200)
Other								3			3
Issuance of common stock (in shares)			149,753
Issuance of common stock		8,506	$ 8,506
Purchase of treasury stock (in shares)	[1]			(82,474)
Purchase of treasury stock	[1]	(4,535)		$ (4,535)
Stock-based compensation and other (in shares)				157,594
Stock-based compensation and other		8,654		$ 8,654
Net capital activities by noncontrolling interests		(15,869)					(15,869)	(15,869)					(15,869)
Ending balance (in shares) at Jun. 30, 2014			110,430,456	23,824					71,264,947
Ending balance at Jun. 30, 2014		$ 4,381,862	$ 2,500,064	$ (189)	1,808,232	(74,217)	147,972	4,490,065	$ 178,162	2,379,696	1,833,635	(49,400)	147,972
Beginning balance (in shares) at Dec. 31, 2014		110,649,762	110,649,762	78,400					71,264,947
Beginning 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
Increase (Decrease) in Shareholders' Equity
Net income		148,234			139,024		9,210	154,440			145,230		9,210
Other comprehensive income		2,541				2,541		2,682				2,682
Dividends on common stock		(131,833)			(131,833)			(131,800)			(131,800)
Other								2			2
Issuance of common stock (in shares)			215,268
Issuance of common stock		13,975	$ 13,975
Purchase of treasury stock (in shares)	[1]			(93,280)
Purchase of treasury stock	[1]	(6,096)		$ (6,096)
Stock-based compensation and other (in shares)				118,121
Stock-based compensation and other		7,732		$ 7,732
Net capital activities by noncontrolling interests		$ (28,012)					(28,012)	(28,012)					(28,012)
Ending balance (in shares) at Jun. 30, 2015		110,865,030	110,865,030	53,559					71,264,947
Ending balance at Jun. 30, 2015		$ 4,525,643	$ 2,526,945	$ (1,765)	$ 1,933,256	$ (65,600)	$ 132,807	$ 4,627,164	$ 178,162	$ 2,379,696	$ 1,982,150	$ (45,651)	$ 132,807

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