Asset Purchase Agreement, Additional Percentage Share of Cost of Control

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- Definition

Asset Purchase Agreement, Operating and Maintenance Cost Reimbursement Receivable

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Asset Purchase Agreement, Operating and Maintenance Cost Reimbursement Receivable, Current

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- Definition

Asset Purchase Agreement, Option to Purchase, Ownership Interest, Percentage

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- Definition

Asset Purchase Agreement, Site Contingency, Increase in Loss Exposure Not Accrued, Best Estimate

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- Definition

Guarantor Obligations, Number of Parental Guarantees

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- Definition

Industry Litigation, Period to Complete Rulemaking Proceeding

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Litigation Settlement, Abeyance Period

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Litigation Settlement, Periodic Update Period

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- Definition

Represents the percentage of share of the cost of control acquired by the entity.

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- Definition

Supply Agreement [Abstract]

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- Definition

Surety Bonds Expiring, Amount

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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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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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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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- Definition

Best estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded.

+ References

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-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
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Commitments and Contingencies - Environmental Matters and Financial Assurances (Details) $ in Millions						9 Months Ended
	Aug. 08, 2017	Jun. 13, 2017 USD ($)	Apr. 28, 2017	Jul. 06, 2016 guarantee	Jun. 24, 2016	Sep. 30, 2017 USD ($)
Clean Power Plan
Environmental Matters
Litigation abeyance period	60 days		60 days
Periodic update period						30 days
Coal Supply Agreement Arbitration \| Four Corners
Four Corners Coal Supply Agreement
Damages sought		$ 30
Arizona Public Service Company \| Coal Supply Agreement Arbitration \| Four Corners
Four Corners Coal Supply Agreement
Damages sought		$ 17
Arizona Public Service Company \| Letter of Credit Expiring in 2016 and 2017
Financial Assurances
Outstanding letters of credit						$ 5
Arizona Public Service Company \| Letters of Credit Expiring in 2017
Financial Assurances
Surety bonds expiring, amount						$ 62
4C Acquisition, LLC \| Four Corners Units 4 and 5
Environmental Matters
Percentage of share of cost of control						7.00%
4C Acquisition, LLC \| Four Corners
Environmental Matters
Percentage of share of cost of control				7.00%
4C Acquisition, LLC \| Coal Supply Agreement Arbitration \| Four Corners
Four Corners Coal Supply Agreement
Reimbursement payments due to 4CA						$ 26
Reimbursement payments due to 4CA at end of current fiscal year						$ 10
NTEC \| Four Corners
Four Corners Coal Supply Agreement
Option to purchase ownership interest (as a percent)				7.00%
NTEC \| Coal Supply Agreement Arbitration \| Four Corners
Four Corners Coal Supply Agreement
Option to purchase ownership interest (as a percent)				7.00%
Regional Haze Rules \| Arizona Public Service Company \| Four Corners Units 4 and 5
Environmental Matters
Percentage of share of cost of control						63.00%
Expected environmental cost						$ 400
Regional Haze Rules \| Arizona Public Service Company \| Natural gas tolling contract obligations \| Four Corners Units 4 and 5
Environmental Matters
Additional percentage share of cost of control						7.00%
Regional Haze Rules \| Arizona Public Service Company \| Four Corners \| Four Corners Units 4 and 5
Environmental Matters
Site contingency increase in loss exposure not accrued, best estimate						$ 45
Regional Haze Rules \| Arizona Public Service Company \| Navajo Plant
Environmental Matters
Expected environmental cost						200
Coal combustion waste \| Arizona Public Service Company \| Four Corners
Environmental Matters
Site contingency increase in loss exposure not accrued, best estimate						22
Coal combustion waste \| Arizona Public Service Company \| Navajo Plant
Environmental Matters
Site contingency increase in loss exposure not accrued, best estimate						1
Coal combustion waste \| Arizona Public Service Company \| Navajo Plant \| Boron Inclusion on List of Groundwater Constituents
Environmental Matters
Industry litigation, period to complete rulemaking proceeding					2 years
Minimum \| Coal combustion waste \| Arizona Public Service Company \| Cholla
Environmental Matters
Site contingency increase in loss exposure not accrued, best estimate						$ 20
Payment Guarantee
Financial Assurances
Number of parental guarantees \| guarantee				4