Adjustments To Additional Paid In Capital, Contributions From Parent

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Increased Contributions From Parent

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Represents the maximum borrowings available for the commercial paper program under the terms of line of credit facility.

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Represents the number of line of credit facilities.

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Public Utilities, Amount Of Approved Equity Infusions, Annual Amount

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

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Represents the long-term debt authorization pursuant to an order from a regulatory authority.

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Public Utility Order Long Term Debt, Increase in Authorization Limit

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Represents the percentage of capitalization which is used to calculate the short-term debt authorization pursuant to an order from a regulatory authority.

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Represents the fixed amount required to be used for purchases of natural gas and power which is used to calculate the short-term debt authorization pursuant to an order from a regulatory authority.

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No definition available.

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Sale Of Stock, Settlement Terms, Expected Number Of Shares Issued In Transaction

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Sale Of Stock, Settlement Terms, Expected Proceeds From Issuance Of Common Stock

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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

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

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- Definition

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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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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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.

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Indicates type of variable interest rate on debt instrument.

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Weighted average interest rate of debt outstanding.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Long-Term Debt and Liquidity Matters - Narrative (Details)							1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 17, 2024 USD ($)	Jun. 12, 2024 USD ($)	Jun. 06, 2024 USD ($)	Apr. 19, 2024 USD ($)	Feb. 09, 2024 USD ($)	Dec. 12, 2023 USD ($)	Jun. 30, 2024 USD ($) day $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	May 09, 2024 USD ($)	Apr. 18, 2024 USD ($)	Oct. 27, 2023 USD ($)	Apr. 10, 2023 USD ($) creditFacility	Apr. 09, 2023 USD ($)	Dec. 15, 2022 USD ($)	Dec. 14, 2022 USD ($)
Long-Term Debt and Liquidity Matters
Short-term debt repayments under term loan facility									$ 350,000,000	$ 0
APS
Long-Term Debt and Liquidity Matters
Short-term debt repayments under term loan facility									350,000,000	0
Annual amount of approved equity infusions									150,000,000
Increased in equity contributions													$ 500,000,000
Contributions from parent		$ 450,000,000						$ 450,000,000	$ 450,000,000	$ 150,000,000
Public utilities, request to permanently modify permitted yearly equity infusions				2.50%
APS \| ACC
Long-Term Debt and Liquidity Matters
Public utility order short term debt authorization as percentage of capitalization																7.00%
Public utility order short term debt authorization, fixed amount																$ 500,000,000
Public utility order long term debt, authorization												$ 8,000,000,000				$ 8,000,000,000	$ 7,500,000,000
Public utility order long term debt, increase in authorization limit				$ 9,500,000,000
Equity Forward Sale Agreements \| Pinnacle West
Long-Term Debt and Liquidity Matters
Sale of stock, settlement terms (in shares) \| shares									11,240,601
Sale of stock, settlement proceeds from issuance of common stock									$ 726,000,000
Term Loan \| APS
Long-Term Debt and Liquidity Matters
Debt instrument, face amount						$ 350,000,000
Debt instrument, term						364 days
Variable rate						1.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]						Secured Overnight Financing Rate (SOFR) [Member]
Proceeds from short-term debt					$ 350,000,000
Unsecured Senior Notes Due 2024 \| APS \| Senior notes
Long-Term Debt and Liquidity Matters
Debt instrument, face amount											$ 450,000,000
Debt instrument, interest rate	3.35%										5.70%
Repayments of unsecured debt	$ 250,000,000
Revolving Credit Facility \| Revolving Credit Facility Maturing May 2026 \| APS
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility														$ 500,000,000
Number of lines of credit facilities \| creditFacility														2
Revolving Credit Facility \| Revolving Credit Facility Maturing April 2028 \| APS
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility														$ 1,250,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to)														1,650,000,000
Revolving Credit Facility \| Revolving Credit Facility Maturing April 2028, Facility One \| APS
Long-Term Debt and Liquidity Matters
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to)														400,000,000
Revolving Credit Facility \| Revolving Credit Facility Maturing April 2028, Facility Two \| APS
Long-Term Debt and Liquidity Matters
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to)														400,000,000
Revolving Credit Facility \| Revolving Credit Facility Maturing in 2022 and 2023 \| APS
Long-Term Debt and Liquidity Matters
Long-term line of credit							$ 0	$ 0	$ 0
Debt, weighted average interest rate							5.43%	5.43%	5.43%
Letter of Credit \| APS
Long-Term Debt and Liquidity Matters
Outstanding letters of credit							$ 27,000,000	$ 27,000,000	$ 27,000,000
Letter of Credit \| Revolving Credit Facility Maturing April 2028 \| APS
Long-Term Debt and Liquidity Matters
Outstanding letters of credit							0	0	0
Commercial Paper \| APS
Long-Term Debt and Liquidity Matters
Maximum commercial paper support available under credit facility														1,000,000,000	$ 750,000,000
Commercial Paper \| Revolving Credit Facility Maturing April 2028 \| APS
Long-Term Debt and Liquidity Matters
Commercial paper							456,000,000	456,000,000	456,000,000
Pinnacle West \| Convertible Notes Due Maturing June 2027 \| Convertible Debt
Long-Term Debt and Liquidity Matters
Debt instrument, face amount							$ 525,000,000	$ 525,000,000	$ 525,000,000
Debt instrument, interest rate							4.75%	4.75%	4.75%
Debt instrument, convertible, conversion ratio									0.108338
Debt instrument, convertible, conversion price (in usd per share) \| $ / shares							$ 92.30	$ 92.30	$ 92.30
Debt instrument redemption price percentage									100.00%
Long-term debt, gross							$ 518,000,000	$ 518,000,000	$ 518,000,000
Unamortized debt issuance expense							7,000,000	7,000,000	7,000,000
Convertible debt, fair value							$ 530,000,000	530,000,000	530,000,000
Pinnacle West \| Convertible Notes Due Maturing June 2027 \| Convertible Debt \| Debt Conversion Terms One
Long-Term Debt and Liquidity Matters
Debt instrument, convertible, threshold trading days \| day							20
Debt instrument, convertible, threshold consecutive trading days \| day							30
Debt instrument, convertible, threshold percentage of stock price trigger							130.00%
Pinnacle West \| Convertible Notes Due Maturing June 2027 \| Convertible Debt \| Debt Conversion Terms Two
Long-Term Debt and Liquidity Matters
Debt instrument, convertible, threshold trading days \| day							5
Debt instrument, convertible, threshold consecutive trading days \| day							10
Debt instrument, convertible, threshold percentage of stock price trigger							98.00%
Pinnacle West \| Floating Rate Notes Due 2026 \| Unsecured Debt
Long-Term Debt and Liquidity Matters
Debt instrument, face amount							$ 350,000,000	350,000,000	350,000,000
Variable rate							0.82%
Pinnacle West \| 450 Million Term Loan
Long-Term Debt and Liquidity Matters
Debt instrument, face amount			$ 450,000,000				$ 450,000,000	450,000,000	450,000,000
Repayments of unsecured debt			$ 250,000,000
Pinnacle West \| 175 Million Term Loan
Long-Term Debt and Liquidity Matters
Debt instrument, face amount							175,000,000	175,000,000	175,000,000
Pinnacle West \| Term Loan
Long-Term Debt and Liquidity Matters
Short-term debt repayments under term loan facility							$ 350,000,000
Pinnacle West \| Term Loan \| APS
Long-Term Debt and Liquidity Matters
Debt instrument, term							364 days
Pinnacle West \| Revolving Credit Facility \| Revolving Credit Facility Maturing May 2026
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility															$ 200,000,000
Pinnacle West \| Revolving Credit Facility \| Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility														200,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders (up to)														$ 300,000,000
Long-term line of credit							$ 0	0	0
Pinnacle West \| Letter of Credit \| Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Outstanding letters of credit							0	0	0
Pinnacle West \| Commercial Paper \| Revolving Credit Facility Maturing April 2028
Long-Term Debt and Liquidity Matters
Commercial paper							$ 76,000,000	$ 76,000,000	$ 76,000,000
Debt, weighted average interest rate							5.46%	5.46%	5.46%