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

+ References

No definition available.

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- Definition

Represents the number of line of credit facilities.

+ References

No definition available.

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- Definition

The common equity ratio (defined as the total shareholder equity divided by the sum of total shareholder equity and long-term debt, including current maturities of long-term debt), which the entity is required to maintain pursuant to an order from a regulatory authority.

+ References

No definition available.

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- Definition

The amount of total shareholder equity required in order for the entity to pay dividends pursuant to an order from a regulatory authority.

+ References

No definition available.

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- Definition

The sum of total shareholder equity and long-term debt less current maturities, including a portion of APS' current maturities of long-term debt.

+ 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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Publisher SEC

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph 2

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

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-Topic 835

-SubTopic 30

-Section 55

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-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

+ Details

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.19(b),22(b))

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

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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

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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-Subparagraph (SAB TOPIC 4.E)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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-Section E

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-Name Accounting Standards Codification

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-Name Regulation S-X (SX)

-Number 210

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-Paragraph 29, 30, 31

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Long-Term Debt and Liquidity Matters Narrative (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Jan. 12, 2015
Debt Provisions
Total shareholder equity	$ 4,396,793,000us-gaap_StockholdersEquity	$ 4,367,493,000us-gaap_StockholdersEquity
Pinnacle West \| Line of Credit \| New revolving credit facility maturing in 2019
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	300,000,000
Outstanding borrowings	0
Pinnacle West \| Commercial Paper \| New revolving credit facility maturing in 2019
Long-Term Debt and Liquidity Matters
Maximum commercial paper support available under credit facility	200,000,000
Commercial Paper	0
Pinnacle West \| Letter of Credit \| New revolving credit facility maturing in 2019
Long-Term Debt and Liquidity Matters
Outstanding letters of credit	0
APS
Debt Provisions
Total shareholder equity	4,499,969,000	4,478,243,000
APS \| ACC
Debt Provisions
Total shareholder equity	4,500,000,000
Total capitalization	8,200,000,000
Dividend restrictions, shareholder equity required	3,300,000,000
APS \| ACC \| Minimum
Debt Provisions
Required common equity ratio ordered by ACC (as a percent)	40.00%
APS \| Commercial Paper
Long-Term Debt and Liquidity Matters
Commercial Paper	45,000,000
APS \| Revolving Credit Facility
Long-Term Debt and Liquidity Matters
Outstanding borrowings	0
Outstanding letters of credit	0
APS \| Revolving Credit Facility \| Revolving credit facilities maturing 2018 & 2019
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility	1,000,000,000
Maximum borrowing capacity on credit facility upon satisfaction of certain conditions and consent of lenders	700,000,000
Number of line of credit facilities	2
APS \| Revolving Credit Facility \| Revolving credit facility maturing in 2018
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility	500,000,000
APS \| Revolving Credit Facility \| New revolving credit facility maturing in 2019
Long-Term Debt and Liquidity Matters
Current borrowing capacity on credit facility	500,000,000
APS \| Commercial Paper
Long-Term Debt and Liquidity Matters
Maximum commercial paper support available under credit facility	250,000,000
APS \| Letter of Credit
Long-Term Debt and Liquidity Matters
Outstanding letters of credit	109,000,000
APS \| Senior Notes \| 4.70% unsecured senior notes that mature on January 15, 2044
Long-Term Debt and Liquidity Matters
Debt issued			$ 250,000,000
Interest rate (as a percent)			2.20%