XML 64 R49.htm IDEA: XBRL DOCUMENT
v3.19.2

REVENUE - DISAGGREGATED REVENUE - PRODUCT (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | $ 136,773 |  | $ 678,077 |
Alternative revenue programs |  | 2,025 |  | 9,059 |
Derivative Instruments |  | 296,082 |  | 1,434,104 |
Revenues out of scope |  | 298,169 |  | 1,434,887 |
Total operating revenues |  | 434,942 | $ 543,435 | 2,112,964 | $ 2,267,783
Natural gas utility sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 115,525 |  | 598,676 |
Wholesale natural gas services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 3,876 |  | 26,204 |
Service contracts |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 7,890 |  | 23,533 |
Installations and maintenance |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 5,193 |  | 14,373 |
Electricity sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 4,745 |  | 16,944 |
Operating Segments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total operating revenues |  | 422,253 | 529,291 | 2,084,987 | $ 2,286,298
Home Services and Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  |  | $ 13,100 | 37,900 |
Eliminations |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers | [1] | (456) |  | (1,653) |
Revenues out of scope | [1] | 62 |  | (8,276) |
Regulated | Operating Segments | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 115,525 |  | 598,676 |
Alternative revenue programs |  | 2,025 |  | 9,059 |
Derivative Instruments |  | 3,232 |  | 14,432 |
Revenues out of scope |  | 5,257 |  | 23,491 |
Total operating revenues |  | 120,782 |  | 622,167 |
Regulated | Operating Segments | Natural gas utility sales | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 115,525 |  | 598,676 |
Regulated | Operating Segments | Wholesale natural gas services | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Regulated | Operating Segments | Service contracts | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Regulated | Operating Segments | Installations and maintenance | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Regulated | Operating Segments | Electricity sales | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Regulated | Eliminations | Natural Gas Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues out of scope | [1] | 0 |  | 0 |
Unregulated | Operating Segments | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 4,745 |  | 16,944 |
Alternative revenue programs |  | 0 |  | 0 |
Derivative Instruments |  | 6,705 |  | 20,763 |
Revenues out of scope |  | 6,705 |  | 20,763 |
Total operating revenues |  | 11,450 |  | 37,707 |
Unregulated | Operating Segments | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 3,876 |  | 26,204 |
Alternative revenue programs |  | 0 |  | 0 |
Derivative Instruments |  | 286,145 |  | 1,398,909 |
Revenues out of scope |  | 286,207 |  | 1,390,633 |
Total operating revenues |  | 290,083 |  | 1,416,837 |
Unregulated | Operating Segments | Natural gas utility sales | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Natural gas utility sales | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Wholesale natural gas services | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Wholesale natural gas services | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 3,876 |  | 26,204 |
Unregulated | Operating Segments | Service contracts | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Service contracts | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Installations and maintenance | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Installations and maintenance | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Operating Segments | Electricity sales | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 4,745 |  | 16,944 |
Unregulated | Operating Segments | Electricity sales | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Home Services and Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 12,627 |  | 36,253 |
Alternative revenue programs |  | 0 |  | 0 |
Derivative Instruments |  | 0 |  | 0 |
Revenues out of scope |  | 0 |  | 0 |
Total operating revenues |  | 12,627 |  | 36,253 |
Unregulated | Home Services and Other | Natural gas utility sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Home Services and Other | Wholesale natural gas services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Home Services and Other | Service contracts |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 7,890 |  | 23,533 |
Unregulated | Home Services and Other | Installations and maintenance |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 5,193 |  | 14,373 |
Unregulated | Home Services and Other | Electricity sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers |  | 0 |  | 0 |
Unregulated | Eliminations |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from contracts with customers | [1] | (456) |  | (1,653) |
Revenues out of scope | [1] | 0 |  | 0 |
Unregulated | Eliminations | Clean Energy Ventures |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues out of scope | [1] | 0 |  | 0 |
Unregulated | Eliminations | Energy Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues out of scope | [1] | $ 62 |  | $ (8,276) |
[1] | Consists of transactions between subsidiaries that are eliminated in consolidation.

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 Revenue Not From Contract With Customer + References No definition available. + Details
Name: | njr_RevenueNotFromContractWithCustomer
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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
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: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
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: |

X
- Details
Name: | us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_RegulatedOperationMember
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_PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap_UnregulatedOperationMember
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: |