XML 50 R48.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

REVENUE - DISAGGREGATED REVENUE - PRODUCT (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | $ 252,130 | $ 224,149
Alternative revenue programs | (1,943) | (867)
Derivative Instruments | 366,960 | 590,792
Revenues out of scope | 362,906 | 587,618
Total operating revenues | 615,036 | 811,767
Natural gas utility sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 219,894 | 194,983
Natural gas services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 16,393 | 10,080
Service contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 8,038 | 7,796
Installations and maintenance |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4,869 | 4,694
Electricity sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4,018 | 7,141
Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total operating revenues | 605,322 | 802,129
Operating Segments | Natural Gas Distribution |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 219,894 | 194,983
Alternative revenue programs | (1,943) | (867)
Derivative Instruments | 1,672 | 5,849
Revenues out of scope | (271) | 4,982
Total operating revenues | 219,623 | 199,965
Operating Segments | Natural Gas Distribution | Natural gas utility sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 219,894 | 194,983
Operating Segments | Natural Gas Distribution | Natural gas services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Natural Gas Distribution | Service contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Natural Gas Distribution | Installations and maintenance |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Natural Gas Distribution | Electricity sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Clean Energy Ventures |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4,018 | 7,141
Alternative revenue programs | 0 | 0
Derivative Instruments | 2,194 | 7,756
Revenues out of scope | 2,194 | 7,756
Total operating revenues | 6,212 | 14,897
Operating Segments | Clean Energy Ventures | Natural gas utility sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Clean Energy Ventures | Natural gas services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Clean Energy Ventures | Service contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Clean Energy Ventures | Installations and maintenance |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Clean Energy Ventures | Electricity sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4,018 | 7,141
Operating Segments | Energy Services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 7,321 | 10,080
Alternative revenue programs | 0 | 0
Derivative Instruments | 363,094 | 577,187
Revenues out of scope | 360,983 | 574,880
Total operating revenues | 368,304 | 584,960
Operating Segments | Energy Services | Natural gas utility sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Energy Services | Natural gas services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 7,321 | 10,080
Operating Segments | Energy Services | Service contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Energy Services | Installations and maintenance |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Energy Services | Electricity sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Midstream |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 8,405 | 0
Alternative revenue programs | 0 | 0
Derivative Instruments | 0 | 0
Revenues out of scope | 0 | 0
Total operating revenues | 8,405 | 0
Operating Segments | Midstream | Natural gas utility sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Midstream | Natural gas services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 9,072 | 0
Operating Segments | Midstream | Service contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Midstream | Installations and maintenance |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Operating Segments | Midstream | Electricity sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Home Services and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues out of scope | 0 | 0
Total operating revenues | 12,492 | 11,945
Home Services and Other | Home Services and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 12,492 | 11,945
Alternative revenue programs | 0 | 0
Derivative Instruments | 0 | 0
Revenues out of scope | 0 | 0
Total operating revenues | 12,492 | 11,945
Home Services and Other | Home Services and Other | Natural gas utility sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Home Services and Other | Home Services and Other | Natural gas services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Home Services and Other | Home Services and Other | Service contracts |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 8,038 | 7,796
Home Services and Other | Home Services and Other | Installations and maintenance |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 4,869 | 4,694
Home Services and Other | Home Services and Other | Electricity sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | 0 | 0
Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (1,082) | (545)
Revenues out of scope | (2,111) | (2,307)
Eliminations | Natural Gas Distribution |  |
Disaggregation of Revenue [Line Items] |  |
Revenues out of scope | 0 | 0
Eliminations | Clean Energy Ventures |  |
Disaggregation of Revenue [Line Items] |  |
Revenues out of scope | 0 | 0
Eliminations | Energy Services |  |
Disaggregation of Revenue [Line Items] |  |
Revenues out of scope | (2,111) | (2,307)
Eliminations | Midstream |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (667) | 0
Revenues out of scope | 0 | 0
Eliminations | Home Services and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues from contracts with customers | (415) | (545)
Revenues out of scope | $ 0 | $ 0

X
- Definition Alternative Revenue Programs, Revenue + References No definition available. + Details
Name: | njr_AlternativeRevenueProgramsRevenue
Namespace Prefix: | njr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
Name: | us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of operating revenues recognized during the period. + References No definition available. + Details
Name: | us-gaap_RegulatedAndUnregulatedOperatingRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue that is not accounted for under Topic 606. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_RevenueNotFromContractWithCustomer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=njr_NaturalGasUtilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=njr_WholesaleNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=njr_ServiceContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=njr_InstallationandMaintenanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ElectricityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=njr_NaturalGasDistributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=njr_CleanEnergyVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=njr_EnergyServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=njr_MidstreamSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=njr_HomeServicesandOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=srt_ConsolidationEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |