Commitments and Contingencies (Details) (ARIZONA PUBLIC SERVICE COMPANY, USD $)	6 Months Ended		0 Months Ended
	Jun. 30, 2014 item	Dec. 31, 1986 item	Jul. 07, 2014 Consolidation of VIEs Period 2016 through 2023 Subsequent event	Jul. 07, 2014 Consolidation of VIEs Period 2024 through 2033 Subsequent event
Palo Verde Nuclear Generating Station
Maximum insurance against public liability per occurrence for a nuclear incident	$ 13,600,000,000
Maximum available nuclear liability insurance	375,000,000
Remaining nuclear liability insurance through mandatory industry wide retrospective assessment program	13,200,000,000
Maximum retrospective premium assessment per reactor for each nuclear liability incident	127,300,000
Annual limit per incident with respect to maximum retrospective premium assessment	19,000,000
Number of VIE lessor trusts	3	3
Maximum potential retrospective assessment per incident of APS	111,000,000
Annual payment limitation with respect to maximum potential retrospective premium assessment	16,500,000
Amount of "all risk" (including nuclear hazards) insurance for property damage to, and decontamination of, property at Palo Verde	2,750,000,000
Maximum amount that APS could incur under the current NEIL policies for each retrospective assessment	20,000,000
Collateral assurance provided based on rating triggers	54,000,000
Period to provide collateral assurance based on rating triggers	20 days
Annual lease payments	$ 49,000,000		$ 23,000,000	$ 16,000,000