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The consolidated debt to total consolidated capitalization ratio, which the entity is required to maintain pursuant to a debt covenant.

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No definition available.

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The actual consolidated debt to total consolidated capitalization ratio, which the entity is required to maintain pursuant to a debt covenant.

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- Definition

Public Utilities, Approved Equity Ratio, Additional Variable Rate

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- Definition

Public Utilities, Request To Modify Permitted Yearly Equity Infusions, Percentage

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Net increase or decrease in the carrying amount of the debt instrument for the period.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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- Definition

Cash received on stock transaction after deduction of issuance costs.

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No definition available.

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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Long-Term Debt and Liquidity Matters - Additional Information (Details) - USD ($) $ in Thousands							1 Months Ended		12 Months Ended
	Dec. 18, 2025	Sep. 04, 2025	Aug. 15, 2025	May 15, 2025	Dec. 23, 2024	Dec. 05, 2024	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Lines of Credit and Short-Term Borrowings
Number of shares issued in transaction (in shares)									2,199,415
Proceeds from issuance of common stock									$ 198,176
Maximum
Lines of Credit and Short-Term Borrowings
Ratio of consolidated debt to consolidated capitalization (as a percent)							65.00%		65.00%
APS
Lines of Credit and Short-Term Borrowings
Equity infusion from Pinnacle West	$ 75,000			$ 300,000					$ 375,000	$ 795,000	$ 150,000
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent)							50.00%		50.00%
Public utilities, request to permanently modify permitted yearly equity infusions									2.50%
Public utilities, number of basis point of approved rate							0.0050		0.0050
Senior Unsecured Notes Maturing May 2025 \| Senior Notes \| APS
Lines of Credit and Short-Term Borrowings
Interest rate				3.15%
Term loans \| APS
Lines of Credit and Short-Term Borrowings
Notes issued						$ 400,000
Repayments of unsecured debt			$ 400,000
Debt instrument term			364 days			364 days
Term loans \| Senior Notes \| APS
Lines of Credit and Short-Term Borrowings
Repayments of unsecured debt				$ 300,000
Senior Unsecured Notes Maturing August 2055 \| Senior Notes \| APS
Lines of Credit and Short-Term Borrowings
Notes issued			$ 700,000
Interest rate			5.90%
Senior Unsecured Notes Maturing August 2034 \| Senior Notes
Lines of Credit and Short-Term Borrowings
Interest rate			5.70%
Senior Unsecured Notes Maturing August 2034 \| Senior Notes \| APS
Lines of Credit and Short-Term Borrowings
Debt instrument, increase (decrease), net			$ 250,000
Pinnacle West Consolidated
Lines of Credit and Short-Term Borrowings
Actual ratio of consolidated debt to total consolidated capitalization required to be maintained as per the debt covenant (as a percent)							60.00%		60.00%
Pinnacle West Consolidated \| Senior Unsecured Notes Maturing May 2028 \| Senior Notes
Lines of Credit and Short-Term Borrowings
Notes issued				$ 400,000
Interest rate				4.90%
Pinnacle West Consolidated \| Senior Unsecured Notes Maturing May 2025 \| Senior Notes
Lines of Credit and Short-Term Borrowings
Notes issued				$ 400,000
Interest rate				5.15%
Pinnacle West Consolidated \| Senior Notes Maturing May 2025 \| Senior Notes
Lines of Credit and Short-Term Borrowings
Interest rate				1.30%
Repayments of unsecured debt				$ 500,000
Pinnacle West Consolidated \| Convertible Notes Due Maturing June 2027 \| Convertible Debt
Lines of Credit and Short-Term Borrowings
Notes issued							$ 525,000		$ 525,000			$ 525,000
Interest rate							4.75%		4.75%			4.75%
Pinnacle West Consolidated \| Term loans
Lines of Credit and Short-Term Borrowings
Notes issued							$ 200,000		$ 200,000
Debt instrument term									364 days
February 2024 Forward Sale Agreements
Lines of Credit and Short-Term Borrowings
Number of shares issued in transaction (in shares)	1,193,950	243,186			5,377,115		1,193,950	243,186
Proceeds from issuance of common stock	$ 75,004	$ 15,350			$ 345,049		$ 75,000	$ 15,000