SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONDENSED STATEMENTS OF INCOME
Operating revenues	$ 699,762	$ 1,152,392	$ 915,822	$ 686,652	$ 693,122	$ 1,109,475	$ 878,576	$ 620,631	$ 3,454,628	$ 3,301,804	$ 3,241,379
Operating expenses									2,608,305	2,450,049	2,494,871
OPERATING INCOME	83,900	415,688	259,812	86,923	101,289	447,970	254,489	48,007	846,323	851,755	746,508
Other
Total									11,261	4,200	16,367
Interest expense									201,888	214,616	241,995
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									670,557	656,310	539,238
Income tax benefit	9,167	131,912	77,043	12,469	18,157	147,116	76,689	(4,645)	230,591	237,317	183,604
INCOME FROM CONTINUING OPERATIONS	32,814	234,718	139,598	32,836	34,905	252,874	130,930	284	439,966	418,993	355,634
Income (loss) from discontinued operations - net of income taxes										(5,829)	11,306
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	24,260	226,163	131,207	24,444	22,631	244,823	122,345	(8,257)	406,074	381,542	339,473
Other comprehensive income attributable to common shareholders									35,955	38,155	7,605
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS									442,029	419,697	347,078
Pinnacle West
CONDENSED STATEMENTS OF INCOME
Operating revenues									799	6,133	1,034
Operating expenses									24,930	12,125	8,811
OPERATING INCOME									(24,131)	(5,992)	(7,777)
Other
Equity in earnings of subsidiaries									420,926	391,528	335,859
Other expense									(1,999)	(2,001)	(1,481)
Total									418,927	389,527	334,378
Interest expense									3,226	4,868	8,053
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									391,570	378,667	318,548
Income tax benefit									(14,504)	(7,079)	(8,938)
INCOME FROM CONTINUING OPERATIONS									406,074	385,746	327,486
Income (loss) from discontinued operations - net of income taxes										(4,204)	11,987
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS									406,074	381,542	339,473
Other comprehensive income attributable to common shareholders									35,955	38,155	7,605
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS									$ 442,029	$ 419,697	$ 347,078