XML 178 R140.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Income Taxes (Possible Decrease In Total Unrecognized Tax Benefits Including Interest) (Details) $ in Millions | Dec. 31, 2017 USD ($)
--- | ---
Income Taxes [Line Items] |
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months | $ 69
Power [Member] |
Income Taxes [Line Items] |
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months | 35
PSE&G [Member] |
Income Taxes [Line Items] |
Possible Decrease in Total Unrecognized Tax Benefits including Interest in next twelve months | $ 30

X
- Definition Income Taxes [Line Items] + References No definition available. + Details
Name: | pseg_IncomeTaxesLineItems
Namespace Prefix: | pseg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
Name: | us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=pseg_PowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pseg_PseAndGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |