Changes in Equity (APSC) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in equity
Balance	$ 4,377,701	$ 4,152,330	$ 4,340,460	$ 4,102,289
Net income	141,384	139,598	166,075	172,434
Other comprehensive income	685	3,474	3,836	9,551
COMPREHENSIVE INCOME	142,069	143,072	169,911	181,985
Dividends on common stock	(125,265)	(119,885)	(125,265)	(119,885)
Net capital activities by noncontrolling interests	(15,869)	(9,196)	(15,869)	(9,196)
Other	(292)	(185)	(3,634)	(15,010)
Balance	4,381,862	4,169,235	4,381,862	4,169,235
Shareholder equity
Changes in equity
Balance	4,222,786	4,014,455	4,194,470	3,972,806
Net income	132,458	131,207	148,224	155,651
Other comprehensive income	685	3,474	3,836	9,551
COMPREHENSIVE INCOME	133,143	134,681	152,060	165,202
Dividends on common stock	(125,265)	(119,885)	(125,265)	(119,885)
Other	(292)	(185)	(3,634)	(15,010)
Balance	4,233,890	4,032,165	4,233,890	4,032,165
Noncontrolling Interests
Changes in equity
Balance	154,915	137,875	145,990	129,483
Net income	8,926	8,391	17,851	16,783
COMPREHENSIVE INCOME	8,926	8,391	17,851	16,783
Net capital activities by noncontrolling interests	(15,869)	(9,196)	(15,869)	(9,196)
Balance	147,972	137,070	147,972	137,070
ARIZONA PUBLIC SERVICE COMPANY
Changes in equity
Balance	4,486,576	4,262,907	4,454,874	4,222,483
Net income	143,842	142,340	172,285	176,774
Other comprehensive income	711	3,551	3,972	9,543
COMPREHENSIVE INCOME	144,553	145,891	176,257	186,317
Dividends on common stock	(125,200)	(119,800)	(125,200)	(119,800)
Net capital activities by noncontrolling interests	(15,869)	(9,196)	(15,869)	(9,196)
Other	5	(6)	3	(8)
Balance	4,490,065	4,279,796	4,490,065	4,279,796
ARIZONA PUBLIC SERVICE COMPANY | Shareholder equity
Changes in equity
Balance	4,331,661	4,125,032	4,308,884	4,093,000
Net income	134,916	133,949	154,434	159,991
Other comprehensive income	711	3,551	3,972	9,543
COMPREHENSIVE INCOME	135,627	137,500	158,406	169,534
Dividends on common stock	(125,200)	(119,800)	(125,200)	(119,800)
Other	5	(6)	3	(8)
Balance	4,342,093	4,142,726	4,342,093	4,142,726
ARIZONA PUBLIC SERVICE COMPANY | Noncontrolling Interests
Changes in equity
Balance	154,915	137,875	145,990	129,483
Net income	8,926	8,391	17,851	16,783
COMPREHENSIVE INCOME	8,926	8,391	17,851	16,783
Net capital activities by noncontrolling interests	(15,869)	(9,196)	(15,869)	(9,196)
Balance	$ 147,972	$ 137,070	$ 147,972	$ 137,070