Changes In Capitalization (Detail) - Jun. 30, 2015 - USD ($) $ in Millions	Total
Power [Member]
Debt Instrument [Line Items]
Cash dividends paid to parent company	$ 400
Medium Term Notes Three Point Zero Percent Due In Two Thousand Twenty Five [Member] \| PSE And G [Member]
Debt Instrument [Line Items]
Issued long-term debt	$ 350
Stated interest rate of debt instrument	3.00%
Medium Term Notes Four Point Zero Five Percent due Two Thousand Forty Five [Member] \| PSE And G [Member]
Debt Instrument [Line Items]
Issued long-term debt	$ 250
Stated interest rate of debt instrument	4.05%
Medium Term Notes Two Point Seven Zero Percentage Due On Two Thousand Fifteen [Member] \| PSE And G [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	2.70%
Repayments of long-term debt	$ 300
Securitization Debt [Member] \| PSE And G [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	117
Transition Fundings Ii Securitization Debt [Member] \| PSE And G [Member]
Debt Instrument [Line Items]
Repayments of long-term debt	$ 8

This element represents disclosure of the total aggregate cash dividends paid to the entity by consolidated subsidiaries, by unconsolidated subsidiaries, and by 50% or less owned persons accounted for using the equity method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 3

-Subparagraph (SX 210.12-04(b))

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-Publisher SEC

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-Number 210

-Section 06

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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

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- Definition

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

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

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-Section S99

-Paragraph 1

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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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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

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-Glossary Financing Activities

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