XML 70 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1

REVENUE Disaggregated Revenue - Product (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		$ 224,149
Alternative revenue programs		(867)
Derivative Instruments		590,792
Revenues out of scope		587,618
Total operating revenues		811,767	$ 705,305
Natural gas utility sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		194,983
Wholesale natural gas services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		10,080
Service contracts
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		7,796
Installations and maintenance
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		4,694
Electricity sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		7,141
Operating Segments
Disaggregation of Revenue [Line Items]
Total operating revenues		802,129	$ 701,764
Home Services and Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		12,500
Eliminations
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	[1]	(545)
Revenues out of scope	[1]	(2,307)
Regulated | Operating Segments | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		194,983
Alternative revenue programs		(867)
Derivative Instruments		5,849
Revenues out of scope		4,982
Total operating revenues		199,965
Regulated | Operating Segments | Natural gas utility sales | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		194,983
Regulated | Operating Segments | Wholesale natural gas services | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Regulated | Operating Segments | Service contracts | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Regulated | Operating Segments | Installations and maintenance | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Regulated | Operating Segments | Electricity sales | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Regulated | Eliminations | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues out of scope	[1]	0
Unregulated | Operating Segments | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		7,141
Alternative revenue programs		0
Derivative Instruments		7,756
Revenues out of scope		7,756
Total operating revenues		14,897
Unregulated | Operating Segments | Energy Services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		10,080
Alternative revenue programs		0
Derivative Instruments		577,187
Revenues out of scope		574,880
Total operating revenues		584,960
Unregulated | Operating Segments | Natural gas utility sales | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Natural gas utility sales | Energy Services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Wholesale natural gas services | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Wholesale natural gas services | Energy Services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		10,080
Unregulated | Operating Segments | Service contracts | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Service contracts | Energy Services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Installations and maintenance | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Installations and maintenance | Energy Services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Operating Segments | Electricity sales | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		7,141
Unregulated | Operating Segments | Electricity sales | Energy Services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Home Services and Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		11,945
Alternative revenue programs		0
Derivative Instruments		0
Revenues out of scope		0
Total operating revenues		11,945
Unregulated | Home Services and Other | Natural gas utility sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Home Services and Other | Wholesale natural gas services
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Home Services and Other | Service contracts
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		7,796
Unregulated | Home Services and Other | Installations and maintenance
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		4,694
Unregulated | Home Services and Other | Electricity sales
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		0
Unregulated | Eliminations
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	[1]	(545)
Revenues out of scope	[1]	0
Unregulated | Eliminations | Clean Energy Ventures
Disaggregation of Revenue [Line Items]
Revenues out of scope	[1]	0
Unregulated | Eliminations | Energy Services
Disaggregation of Revenue [Line Items]
Revenues out of scope	[1]	$ (2,307)
[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: