Selected Quarterly Financial Data (Unaudited) (APSC) (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
Consolidated quarterly financial information
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
Operations and maintenance	238,854	233,323	229,300	223,250	237,141	220,729	216,236	210,663	924,727	884,769	904,286
Operating income	83,900	415,688	259,812	86,923	101,289	447,970	254,489	48,007	846,323	851,755	746,508
Net income (loss) attributable to common shareholder	24,260	226,163	131,207	24,444	22,631	244,823	122,345	(8,257)	406,074	381,542	339,473
ARIZONA PUBLIC SERVICE COMPANY
Consolidated quarterly financial information
Operating revenues	698,824	1,151,535	915,065	685,827	687,031	1,108,623	877,587	620,248	3,451,251	3,293,489
Operations and maintenance	229,505	222,617	224,950	220,752	233,320	218,403	213,746	208,447	897,824	873,916	895,917
Operating income	79,024	284,251	183,728	74,862	77,768	296,945	176,821	53,995	621,865	605,529	554,383
Net income (loss) attributable to common shareholder	$ 30,024	$ 234,954	$ 133,949	$ 26,042	$ 26,843	$ 247,831	$ 124,928	$ (4,105)	$ 424,969	$ 395,497	$ 336,249