Long-Term Debt and Liquidity Matters - Future Principal Payments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Arizona Public Service Company
Principal payments due on long-term debt
2024	$ 250,000
2025	300,000
2026	250,000
2027	300,000
2028	0
Thereafter	6,243,975
Total	7,343,975
Pinnacle West
Principal payments due on long-term debt
2024	875,000
2025	800,000
2026	250,000
2027	300,000
2028	0
Thereafter	6,243,975
Total	$ 8,468,975

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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