XML 113 R75.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Long-Term Investments (Equity Method Investments) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | $ 932 | $ 1,050
Keystone [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Location of the affiliated companies, equity method investments |  | PA |
Owned percentage |  | 23.00% |
Conemaugh [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Location of the affiliated companies, equity method investments |  | PA |
Owned percentage |  | 23.00% |
PennEast [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Location of the affiliated companies, equity method investments |  | PA |
Owned percentage |  | 10.00% |
Kalaeloa [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Location of the affiliated companies, equity method investments |  | HI |
Owned percentage |  | 50.00% |
Power [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | $ 87 | 102
Power [Member] | Partnerships And Corporate Joint Ventures [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments | [1] | 87 | 102
Power [Member] | Partnerships And Corporate Joint Ventures [Member] | Keystone [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | 8 | 7
Power [Member] | Partnerships And Corporate Joint Ventures [Member] | Conemaugh [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | 8 | 8
Power [Member] | Partnerships And Corporate Joint Ventures [Member] | PennEast [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | 0 | 11
Power [Member] | Partnerships And Corporate Joint Ventures [Member] | Kalaeloa [Member] |  |  |
Long-Term Investments [Line Items] |  |  |
Long-Term Investments |  | $ 71 | $ 76
[1] | During the three years ended December 31, 2017, 2016 and 2015, dividends from these investments were $18 million, $18 million and $16 million, respectively.

X
- Definition Investments Owned Percent Of NetAssets + References No definition available. + Details
Name: | pseg_InvestmentsOwnedPercentOfNetassets
Namespace Prefix: | pseg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Further narrative for the holding of the investment. Also any additional footnotes related to the position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010 + Details
Name: | us-gaap_InvestmentOwnedInvestmentAdditionalInformation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_PublicUtilityAxis=pseg_KeystoneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=pseg_ConemaughMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=pseg_PennEastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilityAxis=pseg_KalaeloaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | invest_InvestmentAxis=pseg_PartnershipsAndCorporateJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |