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Jointly-Owned Facilities (Details) - Arizona Public Service Company $ in Thousands | Dec. 31, 2021 USD ($)
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Palo Verde Units 1 and 3 |
Interests in jointly-owned facilities |
Percent owned | 29.10%
Plant in service | $ 1,932,629
Accumulated depreciation | 1,113,905
Construction work in progress | $ 28,288
Palo Verde Unit 2 |
Interests in jointly-owned facilities |
Percent owned | 16.80%
Plant in service | $ 657,102
Accumulated depreciation | 384,193
Construction work in progress | $ 14,084
Palo Verde Common |
Interests in jointly-owned facilities |
Percent owned | 28.00%
Plant in service | $ 792,849
Accumulated depreciation | 334,804
Construction work in progress | 43,690
Palo Verde Sale Leaseback |
Interests in jointly-owned facilities |
Plant in service | 351,050
Accumulated depreciation | 256,884
Construction work in progress | $ 0
Four Corners Generating Station |
Interests in jointly-owned facilities |
Percent owned | 63.00%
Plant in service | $ 1,686,702
Accumulated depreciation | 608,247
Construction work in progress | $ 21,515
Cholla Common Facilities |
Interests in jointly-owned facilities |
Percent owned | 50.50%
Plant in service | $ 208,709
Accumulated depreciation | 121,877
Construction work in progress | $ 1,608
ANPP 500kV System |
Interests in jointly-owned facilities |
Percent owned | 33.50%
Plant in service | $ 133,289
Accumulated depreciation | 53,708
Construction work in progress | $ 115
Navajo Southern System |
Interests in jointly-owned facilities |
Percent owned | 26.80%
Plant in service | $ 89,895
Accumulated depreciation | 35,144
Construction work in progress | $ 1,535
Palo Verde — Yuma 500kV System |
Interests in jointly-owned facilities |
Percent owned | 25.80%
Plant in service | $ 23,650
Accumulated depreciation | 7,188
Construction work in progress | $ 716
Four Corners Switchyards |
Interests in jointly-owned facilities |
Percent owned | 60.10%
Plant in service | $ 73,133
Accumulated depreciation | 18,637
Construction work in progress | $ 258
Phoenix — Mead System |
Interests in jointly-owned facilities |
Percent owned | 17.10%
Plant in service | $ 39,523
Accumulated depreciation | 20,150
Construction work in progress | $ 0
Palo Verde — Rudd 500kV System |
Interests in jointly-owned facilities |
Percent owned | 50.00%
Plant in service | $ 96,376
Accumulated depreciation | 29,426
Construction work in progress | $ 0
Morgan — Pinnacle Peak System |
Interests in jointly-owned facilities |
Percent owned | 64.70%
Plant in service | $ 119,814
Accumulated depreciation | 23,575
Construction work in progress | $ 138
Round Valley System |
Interests in jointly-owned facilities |
Percent owned | 50.00%
Plant in service | $ 535
Accumulated depreciation | 180
Construction work in progress | $ 0
Palo Verde — Morgan System |
Interests in jointly-owned facilities |
Percent owned | 87.80%
Plant in service | $ 259,180
Accumulated depreciation | 27,995
Construction work in progress | $ 268
Hassayampa — North Gila System |
Interests in jointly-owned facilities |
Percent owned | 80.00%
Plant in service | $ 148,039
Accumulated depreciation | 19,317
Construction work in progress | $ 0
Cholla 500kV Switchyard |
Interests in jointly-owned facilities |
Percent owned | 85.70%
Plant in service | $ 8,287
Accumulated depreciation | 2,163
Construction work in progress | $ 5
Saguaro 500kV Switchyard |
Interests in jointly-owned facilities |
Percent owned | 60.00%
Plant in service | $ 21,655
Accumulated depreciation | 13,471
Construction work in progress | $ 0
Kyrene — Knox System |
Interests in jointly-owned facilities |
Percent owned | 50.00%
Plant in service | $ 578
Accumulated depreciation | 328
Construction work in progress | $ 0

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=122136288&loc=d3e659983-123033 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=122136288&loc=d3e659983-123033 + Details
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