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Income Taxes - Summary of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax [Line Items] |  |  |
Tax positions, that if recognized, would decrease our effective tax rate | $ 26,300 | $ 25,714 | $ 22,813
Unrecognized tax benefit interest expense/(benefit) recognized | (535) | 266 | 459
Unrecognized tax benefit interest accrued | 1,320 | 1,855 | 1,589
Arizona Public Service Company |  |  |
Income Tax [Line Items] |  |  |
Tax positions, that if recognized, would decrease our effective tax rate | 26,300 | 25,714 | 22,813
Unrecognized tax benefit interest expense/(benefit) recognized | (535) | 266 | 459
Unrecognized tax benefit interest accrued | $ 1,320 | $ 1,855 | $ 1,589

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- Definition [Line Items] for Income Tax [Table] + References No definition available. + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition Amount of interest expense for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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