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Jointly-Owned Facilities (Details) - Arizona Public Service Company $ in Thousands | Dec. 31, 2024 USD ($)
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Palo Verde Units 1 and 3 |
Interests in jointly-owned facilities |
Percent Owned | 29.10%
Plant in Service | $ 2,010,346
Accumulated Depreciation | 1,081,321
Construction Work in Progress | $ 20,694
Palo Verde Unit 2 |
Interests in jointly-owned facilities |
Percent Owned | 16.80%
Plant in Service | $ 709,414
Accumulated Depreciation | 397,235
Construction Work in Progress | $ 9,076
Palo Verde Common |
Interests in jointly-owned facilities |
Percent Owned | 28.00%
Plant in Service | $ 898,401
Accumulated Depreciation | 366,027
Construction Work in Progress | 47,962
Palo Verde Sale Leaseback |
Interests in jointly-owned facilities |
Plant in Service | 351,050
Accumulated Depreciation | 268,494
Construction Work in Progress | $ 0
Four Corners Generating Station |
Interests in jointly-owned facilities |
Percent Owned | 63.00%
Plant in Service | $ 1,848,412
Accumulated Depreciation | 705,667
Construction Work in Progress | $ 56,226
Cholla Common Facilities |
Interests in jointly-owned facilities |
Percent Owned | 50.50%
Plant in Service | $ 301,035
Accumulated Depreciation | 231,170
Construction Work in Progress | $ 1,743
Arizona Nuclear Power Project 500kV System |
Interests in jointly-owned facilities |
Percent Owned | 33.30%
Plant in Service | $ 134,713
Accumulated Depreciation | 60,174
Construction Work in Progress | $ 7,174
Navajo Southern System |
Interests in jointly-owned facilities |
Percent Owned | 24.70%
Plant in Service | $ 88,528
Accumulated Depreciation | 38,797
Construction Work in Progress | $ 626
Palo Verde — Yuma 500kV System |
Interests in jointly-owned facilities |
Percent Owned | 25.50%
Plant in Service | $ 24,260
Accumulated Depreciation | 8,120
Construction Work in Progress | $ 142
Four Corners Switchyards |
Interests in jointly-owned facilities |
Percent Owned | 58.00%
Plant in Service | $ 84,367
Accumulated Depreciation | 23,886
Construction Work in Progress | $ 309
Phoenix — Mead System |
Interests in jointly-owned facilities |
Percent Owned | 17.10%
Plant in Service | $ 39,788
Accumulated Depreciation | 21,173
Construction Work in Progress | $ 330
Palo Verde — Rudd 500kV System |
Interests in jointly-owned facilities |
Percent Owned | 50.00%
Plant in Service | $ 95,785
Accumulated Depreciation | 34,254
Construction Work in Progress | $ 1,808
Morgan — Pinnacle Peak System |
Interests in jointly-owned facilities |
Percent Owned | 63.20%
Plant in Service | $ 117,500
Accumulated Depreciation | 29,013
Construction Work in Progress | $ 287
Round Valley System |
Interests in jointly-owned facilities |
Percent Owned | 50.00%
Plant in Service | $ 548
Accumulated Depreciation | 213
Construction Work in Progress | $ 0
Palo Verde — Morgan System |
Interests in jointly-owned facilities |
Percent Owned | 87.50%
Plant in Service | $ 266,547
Accumulated Depreciation | 46,327
Construction Work in Progress | $ 208
Hassayampa — North Gila System |
Interests in jointly-owned facilities |
Percent Owned | 80.00%
Plant in Service | $ 154,330
Accumulated Depreciation | 27,739
Construction Work in Progress | $ 0
Cholla 500kV Switchyard |
Interests in jointly-owned facilities |
Percent Owned | 85.70%
Plant in Service | $ 8,454
Accumulated Depreciation | 2,859
Construction Work in Progress | $ 35
Saguaro 500kV Switchyard |
Interests in jointly-owned facilities |
Percent Owned | 60.00%
Plant in Service | $ 29,850
Accumulated Depreciation | 15,768
Construction Work in Progress | $ 101
Kyrene — Knox System |
Interests in jointly-owned facilities |
Percent Owned | 50.00%
Plant in Service | $ 578
Accumulated Depreciation | 349
Construction Work in Progress | $ 0
Agua Fria Switchyard |
Interests in jointly-owned facilities |
Percent Owned | 10.00%
Plant in Service | $ 0
Accumulated Depreciation | 0
Construction Work in Progress | $ 82

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- Definition The period end amount owned by the reporting utility of a jointly owned utility plant in service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The period end amount of construction work in progress at a jointly owned electricity generation plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + Details
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- Definition The period end amount of accumulated depreciation in a jointly owned electricity generation plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1 + Details
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