Long-Term Debt and Liquidity Matters - Schedule of Principal Payments Due on Pinnacle West's and APS's Total Long-Term Debt (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Arizona Public Service Company
Principal payments due on long-term debt
2025	$ 300,000
2026	250,000
2027	300,000
2028	0
2029	568,975
Thereafter	6,125,000
Total	7,543,975
Pinnacle West
Principal payments due on long-term debt
2025	800,000
2026	600,000
2027	825,000
2028	0
2029	568,975
Thereafter	6,125,000
Total	$ 8,918,975

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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