No definition available.

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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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No definition available.

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- Definition

Represents the number of line of credit facilities.

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No definition available.

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- Definition

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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No definition available.

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- Definition

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.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 7

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- Definition

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

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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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.

+ References

No definition available.

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Lines of Credit and Short-Term Borrowings (Details)	Dec. 31, 2015 USD ($) Facility	Sep. 02, 2015 USD ($)	Dec. 31, 2014 USD ($)	Feb. 06, 2013 USD ($)
Lines of Credit and Short-Term Borrowings
Commercial paper	$ 0		$ 147,400,000
Pinnacle West
Lines of Credit and Short-Term Borrowings
Commercial paper	0		0
ARIZONA PUBLIC SERVICE COMPANY
Lines of Credit and Short-Term Borrowings
Commercial paper	0		147,400,000
ARIZONA PUBLIC SERVICE COMPANY \| ACC
Debt Provisions
Percentage of APS's capitalization used in calculation of short-term debt authorization				7.00%
Required amount to be used in purchases of natural gas and power which is used in calculation of short-term debt authorization				$ 500,000,000
Revolving credit facility
Lines of Credit and Short-Term Borrowings
Amount committed	1,200,000,000		1,200,000,000
Revolving credit facility \| Pinnacle West
Lines of Credit and Short-Term Borrowings
Amount committed	200,000,000		200,000,000
Revolving credit facility \| Pinnacle West \| Revolving credit facility maturing in 2019
Lines of Credit and Short-Term Borrowings
Amount committed	200,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders	300,000,000
Long-term line of credit	0
Revolving credit facility \| ARIZONA PUBLIC SERVICE COMPANY
Lines of Credit and Short-Term Borrowings
Amount committed	1,000,000,000		$ 1,000,000,000
Revolving credit facility \| ARIZONA PUBLIC SERVICE COMPANY \| Revolving credit facilities maturing in 2019 and 2020
Lines of Credit and Short-Term Borrowings
Amount committed	1,000,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders	1,400,000,000
Long-term line of credit	$ 0
Number of credit facilities \| Facility	2
Revolving credit facility \| ARIZONA PUBLIC SERVICE COMPANY \| Revolving credit facility maturing September 2020
Lines of Credit and Short-Term Borrowings
Amount committed		$ 500,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders	$ 700,000,000
Revolving credit facility \| ARIZONA PUBLIC SERVICE COMPANY \| Revolving credit facility maturing in May 2019
Lines of Credit and Short-Term Borrowings
Amount committed	500,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders	700,000,000
Revolving credit facility \| ARIZONA PUBLIC SERVICE COMPANY \| Revolving credit facility maturing April 2018
Lines of Credit and Short-Term Borrowings
Amount committed		$ 500,000,000
Letter of credit \| Pinnacle West \| Revolving credit facility maturing in 2019
Lines of Credit and Short-Term Borrowings
Outstanding letters of credit	0
Letter of credit \| ARIZONA PUBLIC SERVICE COMPANY
Lines of Credit and Short-Term Borrowings
Outstanding letters of credit	79,000,000
Letter of credit \| ARIZONA PUBLIC SERVICE COMPANY \| Revolving credit facilities maturing in 2019 and 2020
Lines of Credit and Short-Term Borrowings
Outstanding letters of credit	0
Commercial paper \| Pinnacle West \| Revolving credit facility maturing in 2019
Lines of Credit and Short-Term Borrowings
Commercial paper	0
Commercial paper \| ARIZONA PUBLIC SERVICE COMPANY
Lines of Credit and Short-Term Borrowings
Maximum commercial paper support available under credit facility	$ 250,000,000