Commitments and Contingencies (Details) (ARIZONA PUBLIC SERVICE COMPANY, USD $)	0 Months Ended	3 Months Ended		0 Months Ended
	Apr. 02, 2013	Mar. 31, 2014 item	Dec. 31, 1986 item	Apr. 02, 2014 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 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 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
Sublimit for non-nuclear property damage losses which has been imposed to the primary policy offered				2,250,000,000
Sublimit for non-nuclear losses which has been imposed to the accidental outage policy	327,600,000
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