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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash and Cash Equivalents [Line Items] |  |  |
Income taxes, net of refunds | $ 8,788 | $ 46,227 | $ 229
Interest, net of amounts capitalized | 310,996 | 245,271 | 227,584
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] |  |  |
Accrued capital expenditures | 206,269 | 114,999 | 167,733
Dividends declared but not paid | 99,813 | 97,895 | 95,988
BCE Sale non-cash consideration | 28,262 | 0 | 0
Arizona Public Service Company |  |  |
Cash and Cash Equivalents [Line Items] |  |  |
Income taxes, net of refunds | 21,734 | 95,985 | 19,783
Interest, net of amounts capitalized | 267,261 | 227,159 | 217,749
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] |  |  |
Accrued capital expenditures | 206,269 | 116,533 | 167,657
Dividends declared but not paid | $ 99,800 | $ 97,900 | $ 96,000

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