Long-Term Debt and Liquidity Matters (Details 2) (USD $)	Dec. 31, 2012
ARIZONA PUBLIC SERVICE COMPANY
Principal payments due on long-term debt
2013	$ 123,000,000
2014	540,000,000
2015	345,000,000
2016	358,000,000
Thereafter	1,840,000,000
Total	3,206,000,000
Pinnacle West
Principal payments due on long-term debt
2013	123,000,000
2014	540,000,000
2015	470,000,000
2016	358,000,000
Thereafter	1,840,000,000
Total	$ 3,331,000,000

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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