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Long-Term Debt and Liquidity Matters (Details) - USD ($) | Aug. 01, 2016 | Dec. 31, 2016 | Dec. 06, 2016 | Sep. 20, 2016 | Jun. 01, 2016 | May 06, 2016 | Apr. 22, 2016 | Dec. 31, 2015 | Feb. 06, 2013 | Feb. 05, 2013
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Debt Provisions |  |  |  |  |  |  |  |  |  |
Total shareholder equity |  | $ 4,803,622,000 |  |  |  |  |  | $ 4,583,917,000 |  |
Maximum |  |  |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Ratio of consolidated debt to consolidated capitalization (as a percent) |  | 65.00% |  |  |  |  |  |  |  |
ARIZONA PUBLIC SERVICE COMPANY |  |  |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent) |  | 47.00% |  |  |  |  |  |  |  |
Total shareholder equity |  | $ 4,905,680,000 |  |  |  |  |  | 4,679,254,000 |  |
ARIZONA PUBLIC SERVICE COMPANY | ACC |  |  |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Total shareholder equity |  | 4,900,000,000 |  |  |  |  |  |  |  |
Total capitalization |  | 9,100,000,000 |  |  |  |  |  |  |  |
Dividend restrictions, shareholder equity required |  | $ 3,600,000,000 |  |  |  |  |  |  |  |
Long term debt authorization |  |  |  |  |  |  |  |  | $ 5,100,000,000.0 | $ 4,200,000,000.0
ARIZONA PUBLIC SERVICE COMPANY | Minimum | ACC |  |  |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Required common equity ratio ordered by ACC (as a percent) (at least) |  | 40.00% |  |  |  |  |  |  |  |
Pinnacle West |  |  |  |  |  |  |  |  |  |
Debt Provisions |  |  |  |  |  |  |  |  |  |
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent) |  | 48.00% |  |  |  |  |  |  |  |
Total shareholder equity |  | $ 4,803,622,000 |  |  |  |  |  | $ 4,583,917,000 |  |
Term Loan Facility Maturing April 22, 2019 | ARIZONA PUBLIC SERVICE COMPANY | Term loan |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  |  | $ 100,000,000 |  |  |
Unsecured Senior Notes 3.75 Percent Mature on 15 May, 2046 | ARIZONA PUBLIC SERVICE COMPANY | Senior notes |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  |  |  | $ 350,000,000 |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 3.75% |  |  |  |
Arizona Pollution Control Corporation Revenue Refunding Bonds, 2009 Series D and E | ARIZONA PUBLIC SERVICE COMPANY | Current maturities of long-term debt |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Principal balance repaid |  |  |  |  | $ 64,000,000 |  |  |  |  |
Arizona pollution control corporation revenue refunding bonds, 2009 series A | ARIZONA PUBLIC SERVICE COMPANY |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Principal balance repaid |  |  |  |  | $ 13,000,000 |  |  |  |  |
Unsecured Senior Notes 6.25 Percent Mature on 01 August, 2016 | ARIZONA PUBLIC SERVICE COMPANY | Senior notes |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 6.25% |  |  |  |  |  |  |  |  |
Repayments of debt | $ 250,000,000 |  |  |  |  |  |  |  |  |
Unsecured Senior Notes 2.55 Percent Mature on 15 September, 2026 | ARIZONA PUBLIC SERVICE COMPANY | Senior notes |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Notes issued |  |  |  | $ 250,000,000 |  |  |  |  |  |
Interest rate (as a percent) |  |  |  | 2.55% |  |  |  |  |  |
Arizona Pollution Control Corporation Revenue Refunding Bond, 2009 Series B | ARIZONA PUBLIC SERVICE COMPANY | Current maturities of long-term debt |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Principal balance repaid |  |  |  | $ 27,000,000 |  |  |  |  |  |
Coconino County Arizona Pollution Control Corporation Revenue Refunding Bonds | ARIZONA PUBLIC SERVICE COMPANY | Current maturities of long-term debt |  |  |  |  |  |  |  |  |  |
Long-Term Debt and Liquidity Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Principal balance repaid |  |  | $ 17,000,000 |  |  |  |  |  |  |

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