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Asset Retirement Obligations (Details) - ARIZONA PUBLIC SERVICE COMPANY - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Asset Retirement Obligations |  |
Newly incurred or acquired obligations | $ 0 | $ 17,864
ARO, decrease |  | 1,000
Change in asset retirement obligations |  |
Asset retirement obligations at the beginning of year | 726,545 | 679,529
Changes attributable to: |  |
Accretion expense | 39,726 | 36,876
Settlements | (12,591) | (9,726)
Estimated cash flow revisions | (96,462) | 2,002
Newly incurred or acquired obligations | 0 | 17,864
Asset retirement obligations at the end of year | 657,218 | 726,545
Palo Verde Nuclear Generating Station |  |
Asset Retirement Obligations |  |
ARO, decrease | 89,000 |
Increase in regulatory asset | 80,000 |
Decrease in regulatory liability | 9,000 |
Solar Panels |  |
Asset Retirement Obligations |  |
Newly incurred or acquired obligations |  | 14,000
Changes attributable to: |  |
Newly incurred or acquired obligations |  | 14,000
4CA |  |
Asset Retirement Obligations |  |
ARO, decrease |  | 9,000
Navajo Generating Station |  |
Asset Retirement Obligations |  |
ARO, decrease | $ 8,000 |
Consumer Solar Panels |  |
Asset Retirement Obligations |  |
Newly incurred or acquired obligations |  | 7,000
Changes attributable to: |  |
Newly incurred or acquired obligations |  | $ 7,000

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- Definition Asset Retirement Obligation, Increase in Regulatory Asset + References No definition available. + Details
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- Definition Asset Retirement Obligation, Liabilities Incurred, Decrease in Regulatory Liability + References No definition available. + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 + Details
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- Definition Amount of asset retirement obligations incurred during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of increase (decrease) in asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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