Changes in Equity (APSC) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Changes in equity
Balance	$ 4,340,460	$ 4,102,289
Net income	24,691	32,836
Other comprehensive income	3,151	6,077
COMPREHENSIVE INCOME	27,842	38,913
Other	(3,342)	(14,825)
Balance	4,377,701	4,152,330
Shareholder equity
Changes in equity
Balance	4,194,470	3,972,806
Net income	15,766	24,444
Other comprehensive income	3,151	6,077
COMPREHENSIVE INCOME	18,917	30,521
Other	(3,342)	(14,825)
Balance	4,222,786	4,014,455
Noncontrolling Interests
Changes in equity
Balance	145,990	129,483
Net income	8,925	8,392
COMPREHENSIVE INCOME	8,925	8,392
Balance	154,915	137,875
ARIZONA PUBLIC SERVICE COMPANY
Changes in equity
Balance	4,454,874	4,222,483
Net income	28,443	34,434
Other comprehensive income	3,261	5,992
COMPREHENSIVE INCOME	31,704	40,426
Other	(2)	(2)
Balance	4,486,576
ARIZONA PUBLIC SERVICE COMPANY | Shareholder equity
Changes in equity
Balance	4,308,884	4,093,000
Net income	19,518	26,042
Other comprehensive income	3,261	5,992
COMPREHENSIVE INCOME	22,779	32,034
Other	(2)	(2)
Balance	4,331,661	4,125,032
ARIZONA PUBLIC SERVICE COMPANY | Noncontrolling Interests
Changes in equity
Balance	145,990	129,483
Net income	8,925	8,392
COMPREHENSIVE INCOME	8,925	8,392
Balance	$ 154,915	$ 137,875