$NJR
NEW JERSEY RESOURCES CORP Stock $njr

$njr Overview Financials Valuation SEC Filings Company Website

2021 Q3 Form 10-K Financial Statement

#000035630921000095 Filed on November 18, 2021

Income Statement

Concept	2021 Q3	2021	2020 Q3
Revenue	$532.5M	$2.157B	$400.0M
YoY Change	33.12%	10.39%	-16.5%
Cost Of Revenue	$395.1M	$1.352B	$248.6M
YoY Change	58.95%	3.6%	-35.73%
Gross Profit	$137.4M	$804.9M	$151.4M
YoY Change	-9.25%	24.03%	64.03%
Gross Profit Margin	25.8%	37.32%	37.85%
Selling, General & Admin	$6.684M	$55.56M	$5.700M
YoY Change	17.26%	12.24%	216.67%
% of Gross Profit	4.87%	6.9%	3.76%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$29.41M	$111.4M	$30.10M
YoY Change	-2.29%	3.74%	23.36%
% of Gross Profit	21.41%	13.84%	19.88%
Operating Expenses	$134.3M	$516.6M	$111.6M
YoY Change	20.31%	19.42%	11.49%
Operating Profit	$3.118M	$288.4M	$42.66M
YoY Change	-92.69%	25.97%	-961.54%
Interest Expense	-$19.88M	$78.56M	-$17.20M
YoY Change	15.56%	16.22%	258.33%
% of Operating Profit	-637.46%	27.24%	-40.32%
Other Income/Expense, Net	$10.66M	$24.60M	$13.60M
YoY Change	-21.65%	3.01%	1033.33%
Pretax Income	-$6.102M	$234.4M	$36.30M
YoY Change	-116.81%	26.57%	-418.42%
Income Tax	-$4.427M	$33.29M	-$2.900M
% Of Pretax Income		14.2%	-7.99%
Net Earnings	-$1.133M	$117.9M	$32.71M
YoY Change	-103.46%	-27.68%	-371.95%
Net Earnings / Revenue	-0.21%	5.47%	8.18%
Basic Earnings Per Share		$1.23	$0.34
Diluted Earnings Per Share	-$11.78K	$1.22	$0.34
COMMON SHARES
Basic Shares Outstanding	96.43M shares	96.23M shares	95.93M shares
Diluted Shares Outstanding		96.56M shares

Balance Sheet

Concept	2021 Q3	2021	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$4.749M	$4.749M	$117.0M
YoY Change	-95.94%	-95.94%	4233.33%
Cash & Equivalents	$4.749M	$4.749M	$117.0M
Short-Term Investments
Other Short-Term Assets	$20.24M	$214.0M	$21.03M
YoY Change	-3.78%	21.09%	-6.1%
Inventory	$213.2M	$213.2M	$187.9M
Prepaid Expenses
Receivables	$188.2M	$188.2M	$126.9M
Other Receivables	$14.20M	$14.20M	$13.70M
Total Short-Term Assets	$634.3M	$634.3M	$622.3M
YoY Change	1.92%	1.92%	21.64%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.387B	$4.387B	$3.855B
YoY Change	13.83%	13.83%	26.74%
Goodwill
YoY Change
Intangibles	$5.029M		$10.06M
YoY Change	-50.01%		-31.15%
Long-Term Investments	$114.5M	$114.5M	$208.4M
YoY Change	-45.04%	-45.04%	4.05%
Other Assets	$49.92M	$543.1M	$85.66M
YoY Change	-41.72%	-6.55%	-26.2%
Total Long-Term Assets	$5.088B	$5.088B	$4.694B
YoY Change	8.39%	8.39%	472.31%
TOTAL ASSETS
Total Short-Term Assets	$634.3M	$634.3M	$622.3M
Total Long-Term Assets	$5.088B	$5.088B	$4.694B
Total Assets	$5.722B	$5.722B	$5.316B
YoY Change	7.63%	7.63%	27.86%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$223.5M	$394.8M	$141.5M
YoY Change	57.95%	65.74%	9.08%
Accrued Expenses	$4.300M	$4.300M	$6.700M
YoY Change	-35.82%	-35.82%
Deferred Revenue	$1.745M
YoY Change
Short-Term Debt	$377.3M	$377.3M	$125.4M
YoY Change	201.0%	200.88%	392.53%
Long-Term Debt Due	$72.84M	$72.84M	$27.20M
YoY Change	167.79%	167.79%	27.1%
Total Short-Term Liabilities	$1.051B	$1.051B	$533.7M
YoY Change	97.0%	97.0%	19.57%
LONG-TERM LIABILITIES
Long-Term Debt	$2.162B	$2.162B	$2.260B
YoY Change	-4.31%	-4.31%	46.99%
Other Long-Term Liabilities	$11.96M	$711.3M	$10.58M
YoY Change	13.04%	-3.62%	-11.44%
Total Long-Term Liabilities	$877.8M	$2.873B	$879.4M
YoY Change	-0.18%	-4.14%	10.96%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.051B	$1.051B	$533.7M
Total Long-Term Liabilities	$877.8M	$2.873B	$879.4M
Total Liabilities	$1.929B	$4.091B	$1.413B
YoY Change	36.52%	11.4%	14.06%
SHAREHOLDERS EQUITY
Retained Earnings	$934.6M		$947.5M
YoY Change	-1.36%		4.57%
Common Stock	$743.2M		$732.2M
YoY Change	1.5%		41.36%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$12.45M		-$8.485M
YoY Change	-246.71%		-181.31%
Treasury Stock Shares	762.3K shares		148.3K shares
Shareholders Equity	$1.631B	$1.631B	$1.644B
YoY Change
Total Liabilities & Shareholders Equity	$5.722B	$5.722B	$5.316B
YoY Change	7.63%	7.63%	27.86%

Cashflow Statement

Concept	2021 Q3	2021	2020 Q3
OPERATING ACTIVITIES
Net Income	-$1.133M	$117.9M	$32.71M
YoY Change	-103.46%	-27.68%	-371.95%
Depreciation, Depletion And Amortization	$29.41M	$111.4M	$30.10M
YoY Change	-2.29%	3.74%	23.36%
Cash From Operating Activities	$49.16M	$391.0M	$30.70M
YoY Change	60.12%	83.13%	30.08%
INVESTING ACTIVITIES
Capital Expenditures	-$182.3M	-$574.3M	-$105.2M
YoY Change	73.29%	28.16%	-37.83%
Acquisitions
YoY Change
Other Investing Activities	-$9.944M	-$47.82M	$2.200M
YoY Change	-552.0%	-91.24%	-126.19%
Cash From Investing Activities	-$192.2M	-$622.1M	-$103.0M
YoY Change	86.65%	-37.41%	-42.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$12.11M
YoY Change		-166.99%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	143.1M	$117.8M	146.5M
YoY Change	-2.31%	-86.85%	11.49%
NET CHANGE
Cash From Operating Activities	49.16M	$391.0M	30.70M
Cash From Investing Activities	-192.2M	-$622.1M	-103.0M
Cash From Financing Activities	143.1M	$117.8M	146.5M
Net Change In Cash	33.00K	-$113.4M	74.20M
YoY Change	-99.96%	-198.28%	-428.32%
FREE CASH FLOW
Cash From Operating Activities	$49.16M	$391.0M	$30.70M
Capital Expenditures	-$182.3M	-$574.3M	-$105.2M
Free Cash Flow	$231.5M	$965.2M	$135.9M
YoY Change	70.32%	45.9%	-29.51%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000356309
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q3	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#PublicUtilitiesPropertyPlantAndEquipmentPlantInService
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#PublicUtilitiesPropertyPlantAndEquipmentPlantInService
CY2021Q3	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligationsCurrent
CY2020Q3	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligationsCurrent
CY2020Q3	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligations
CY2021Q3	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligations
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-08359
CY2021	dei	Entity Registrant Name EntityRegistrantName	NEW JERSEY RESOURCES CORPORATION
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-2376465
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	1415 Wyckoff Road,
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Wall,
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	07719
CY2021	dei	City Area Code CityAreaCode	(732)
CY2021	dei	Local Phone Number LocalPhoneNumber	938‑1000
CY2021	dei	Security12b Title Security12bTitle	Common Stock ‑ $2.50 Par Value
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Trading Symbol TradingSymbol	NJR
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q1	dei	Entity Public Float EntityPublicFloat	3824984427	USD
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	95949116	shares
CY2021	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	731459000	USD
CY2020	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	729923000	USD
CY2019	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	710793000	USD
CY2021	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1425154000	USD
CY2020	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1223745000	USD
CY2019	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	1881252000	USD
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2156613000	USD
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1953668000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2021	us-gaap	Related Parties Amount In Cost Of Sales RelatedPartiesAmountInCostOfSales	7013000	USD
CY2020	us-gaap	Related Parties Amount In Cost Of Sales RelatedPartiesAmountInCostOfSales	6083000	USD
CY2019	us-gaap	Related Parties Amount In Cost Of Sales RelatedPartiesAmountInCostOfSales	7948000	USD
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	366905000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	278143000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	268141000	USD
CY2021	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	38304000	USD
CY2020	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	34529000	USD
CY2019	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	33937000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111387000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107368000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81109000	USD
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	1868263000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	1724759000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	2427489000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	288350000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	228909000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	164556000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	24597000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	23878000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	11273000	USD
CY2021	us-gaap	Interest Expense InterestExpense	78559000	USD
CY2020	us-gaap	Interest Expense InterestExpense	67597000	USD
CY2019	us-gaap	Interest Expense InterestExpense	47082000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	234388000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	185190000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	128747000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33286000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36494000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18440000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-83212000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	14311000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13628000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	117890000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.23
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.72
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.22
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.71
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	96227000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94798000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	89242000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	96560000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	95103000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	89596000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	117890000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-350000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-32000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1021000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-108000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-3203000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
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CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	2575000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-567000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-6106000	USD
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CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2131000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	15731000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9787000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-12528000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-15731000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	127677000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	150479000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	108204000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	117890000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
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CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
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CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	645000	USD
CY2021	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	92000000	USD
CY2020	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2019	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111387000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107368000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81109000	USD
CY2021	njr	Amortization Of Acquired Contracts AmortizationOfAcquiredContracts	4604000	USD
CY2020	njr	Amortization Of Acquired Contracts AmortizationOfAcquiredContracts	4924000	USD
CY2019	njr	Amortization Of Acquired Contracts AmortizationOfAcquiredContracts	8424000	USD
CY2021	njr	Increase Decreasein Allowancefor Equity Funds Used During Construction Operating Activities IncreaseDecreaseinAllowanceforEquityFundsUsedDuringConstructionOperatingActivities	20303000	USD
CY2020	njr	Increase Decreasein Allowancefor Equity Funds Used During Construction Operating Activities IncreaseDecreaseinAllowanceforEquityFundsUsedDuringConstructionOperatingActivities	17053000	USD
CY2019	njr	Increase Decreasein Allowancefor Equity Funds Used During Construction Operating Activities IncreaseDecreaseinAllowanceforEquityFundsUsedDuringConstructionOperatingActivities	6492000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	18986000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2238000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2387000	USD
CY2021	njr	Amortization Of Operating Leases AmortizationOfOperatingLeases	3920000	USD
CY2020	njr	Amortization Of Operating Leases AmortizationOfOperatingLeases	3851000	USD
CY2019	njr	Amortization Of Operating Leases AmortizationOfOperatingLeases	0	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	23796000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	34346000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2822000	USD
CY2021	njr	Increase Decreasein Investment Tax Credit IncreaseDecreaseinInvestmentTaxCredit	6482000	USD
CY2020	njr	Increase Decreasein Investment Tax Credit IncreaseDecreaseinInvestmentTaxCredit	6482000	USD
CY2019	njr	Increase Decreasein Investment Tax Credit IncreaseDecreaseinInvestmentTaxCredit	6482000	USD
CY2021	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	17532000	USD
CY2020	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	7651000	USD
CY2019	us-gaap	Payments For Environmental Liabilities PaymentsForEnvironmentalLiabilities	13878000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	3046000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	5848000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	4156000	USD
CY2021	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	1129000	USD
CY2020	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	245000	USD
CY2019	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	258000	USD
CY2021	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	7669000	USD
CY2020	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	9032000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	8157000	USD
CY2021	njr	Share Based Payment Arrangement Delivered Shares Expense Tax Benefit ShareBasedPaymentArrangementDeliveredSharesExpenseTaxBenefit	159000	USD
CY2020	njr	Share Based Payment Arrangement Delivered Shares Expense Tax Benefit ShareBasedPaymentArrangementDeliveredSharesExpenseTaxBenefit	-647000	USD
CY2019	njr	Share Based Payment Arrangement Delivered Shares Expense Tax Benefit ShareBasedPaymentArrangementDeliveredSharesExpenseTaxBenefit	-1290000	USD
CY2021	njr	Increase Decrease In Operating Capital Current IncreaseDecreaseInOperatingCapitalCurrent	-10254000	USD
CY2020	njr	Increase Decrease In Operating Capital Current IncreaseDecreaseInOperatingCapitalCurrent	8096000	USD
CY2019	njr	Increase Decrease In Operating Capital Current IncreaseDecreaseInOperatingCapitalCurrent	27759000	USD
CY2021	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-13715000	USD
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	44129000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-8193000	USD
CY2021	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-3481000	USD
CY2020	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	5280000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	38125000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	390954000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	213481000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	194128000	USD
CY2021	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	50316000	USD
CY2020	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	22059000	USD
CY2019	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	40195000	USD
CY2021	njr	Cash Acquired From Asset Acquisition CashAcquiredFromAssetAcquisition	5100000	USD
CY2021	njr	Payments For Asset Acquisitions Net Of Cash Acquired PaymentsForAssetAcquisitionsNetOfCashAcquired	0	USD
CY2020	njr	Payments For Asset Acquisitions Net Of Cash Acquired PaymentsForAssetAcquisitionsNetOfCashAcquired	523647000	USD
CY2019	njr	Payments For Asset Acquisitions Net Of Cash Acquired PaymentsForAssetAcquisitionsNetOfCashAcquired	0	USD
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	3183000	USD
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	1907000	USD
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	2428000	USD
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	690000	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2117000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4102000	USD
CY2021	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	0	USD
CY2020	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	0	USD
CY2019	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	34484000	USD
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	205745000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-622117000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-994025000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-287377000	USD
CY2021	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	660000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	467900000	USD
CY2021	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	18007000	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	20286000	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	218638000	USD
CY2021	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	350000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
CY2021	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
CY2020	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	350000000	USD
CY2019	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	251950000	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	99900000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-126500000	USD
CY2021	njr	Sale Leaseback Transaction Net Proceeds Financing Activities Solar SaleLeasebackTransactionNetProceedsFinancingActivitiesSolar	17673000	USD
CY2020	njr	Sale Leaseback Transaction Net Proceeds Financing Activities Solar SaleLeasebackTransactionNetProceedsFinancingActivitiesSolar	42927000	USD
CY2019	njr	Sale Leaseback Transaction Net Proceeds Financing Activities Solar SaleLeasebackTransactionNetProceedsFinancingActivitiesSolar	0	USD
CY2021	njr	Net Proceedsfrom Sale Leaseback Transaction Financing Activities NetProceedsfromSaleLeasebackTransactionFinancingActivities	0	USD
CY2020	njr	Net Proceedsfrom Sale Leaseback Transaction Financing Activities NetProceedsfromSaleLeasebackTransactionFinancingActivities	4000000	USD
CY2019	njr	Net Proceedsfrom Sale Leaseback Transaction Financing Activities NetProceedsfromSaleLeasebackTransactionFinancingActivities	9895000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	116960000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	117804000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	104059000	USD
CY2021	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	0	USD
CY2020	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	212900000	USD
CY2019	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	0	USD
CY2021	njr	Payment For Settlement Of Equity Forward Sales Agreement PaymentForSettlementOfEquityForwardSalesAgreement	2823000	USD
CY2020	njr	Payment For Settlement Of Equity Forward Sales Agreement PaymentForSettlementOfEquityForwardSalesAgreement	0	USD
CY2019	njr	Payment For Settlement Of Equity Forward Sales Agreement PaymentForSettlementOfEquityForwardSalesAgreement	0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1938000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3813000	USD
CY2021	njr	Proceeds From Waiver Discount Issuance Of Common Stock ProceedsFromWaiverDiscountIssuanceOfCommonStock	0	USD
CY2020	njr	Proceeds From Waiver Discount Issuance Of Common Stock ProceedsFromWaiverDiscountIssuanceOfCommonStock	0	USD
CY2019	njr	Proceeds From Waiver Discount Issuance Of Common Stock ProceedsFromWaiverDiscountIssuanceOfCommonStock	57391000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	15105000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	18080000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	16717000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	27217000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	7104000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	117783000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	895904000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	95602000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-113380000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	115360000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4063000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2353000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	119423000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1710000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6043000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	119423000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4063000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	81366000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-5065000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-63795000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	25257000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3254000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-14265000	USD
CY2021	us-gaap	Increase Decrease In Recoverable Refundable Gas Costs IncreaseDecreaseInRecoverableRefundableGasCosts	13124000	USD
CY2020	us-gaap	Increase Decrease In Recoverable Refundable Gas Costs IncreaseDecreaseInRecoverableRefundableGasCosts	-17479000	USD
CY2019	us-gaap	Increase Decrease In Recoverable Refundable Gas Costs IncreaseDecreaseInRecoverableRefundableGasCosts	15733000	USD
CY2021	us-gaap	Increase Decrease In Other Accounts Payable IncreaseDecreaseInOtherAccountsPayable	72752000	USD
CY2020	us-gaap	Increase Decrease In Other Accounts Payable IncreaseDecreaseInOtherAccountsPayable	-41326000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable IncreaseDecreaseInOtherAccountsPayable	-74031000	USD
CY2021	us-gaap	Increase Decrease In Due To Related Parties Current IncreaseDecreaseInDueToRelatedPartiesCurrent	70000	USD
CY2020	us-gaap	Increase Decrease In Due To Related Parties Current IncreaseDecreaseInDueToRelatedPartiesCurrent	1000	USD
CY2019	us-gaap	Increase Decrease In Due To Related Parties Current IncreaseDecreaseInDueToRelatedPartiesCurrent	-360000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	30063000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	20390000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	2256000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	1527000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-2548000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	1193000	USD
CY2021	njr	Increase Decrease In Prepaid And Accrued Taxes IncreaseDecreaseInPrepaidAndAccruedTaxes	-3449000	USD
CY2020	njr	Increase Decrease In Prepaid And Accrued Taxes IncreaseDecreaseInPrepaidAndAccruedTaxes	-2376000	USD
CY2019	njr	Increase Decrease In Prepaid And Accrued Taxes IncreaseDecreaseInPrepaidAndAccruedTaxes	2271000	USD
CY2021	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	28013000	USD
CY2020	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-6097000	USD
CY2019	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-22004000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	6652000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-1182000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-209000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2573000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-656000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3184000	USD
CY2021	njr	Increase Decrease In Operating Capital Current IncreaseDecreaseInOperatingCapitalCurrent	-10254000	USD
CY2020	njr	Increase Decrease In Operating Capital Current IncreaseDecreaseInOperatingCapitalCurrent	8096000	USD
CY2019	njr	Increase Decrease In Operating Capital Current IncreaseDecreaseInOperatingCapitalCurrent	27759000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	78650000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	66146000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	50371000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	6381000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7594000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12647000	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	64626000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	19434000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	30725000	USD
CY2021Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	3324611000	USD
CY2020Q3	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	2800052000	USD
CY2021Q3	njr	Public Utilities Property Plantand Equipment Workin Progress PublicUtilitiesPropertyPlantandEquipmentWorkinProgress	182196000	USD
CY2020Q3	njr	Public Utilities Property Plantand Equipment Workin Progress PublicUtilitiesPropertyPlantandEquipmentWorkinProgress	379846000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	1124896000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	1108512000	USD
CY2021Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	365346000	USD
CY2020Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	176556000	USD
CY2021Q3	njr	Public Utilities And Other Property Plantand Equipment Gross PublicUtilitiesAndOtherPropertyPlantandEquipmentGross	4997049000	USD
CY2020Q3	njr	Public Utilities And Other Property Plantand Equipment Gross PublicUtilitiesAndOtherPropertyPlantandEquipmentGross	4464966000	USD
CY2021Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	611827000	USD
CY2020Q3	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	601635000	USD
CY2021Q3	njr	Accumulated Depreciation Depletionand Amortization Other Property Plantand Equipment AccumulatedDepreciationDepletionandAmortizationOtherPropertyPlantandEquipment	171709000	USD
CY2020Q3	njr	Accumulated Depreciation Depletionand Amortization Other Property Plantand Equipment AccumulatedDepreciationDepletionandAmortizationOtherPropertyPlantandEquipment	140562000	USD
CY2021Q3	njr	Public Utilities And Other Property Plantand Equipment Net PublicUtilitiesAndOtherPropertyPlantandEquipmentNet	4213513000	USD
CY2020Q3	njr	Public Utilities And Other Property Plantand Equipment Net PublicUtilitiesAndOtherPropertyPlantandEquipmentNet	3722769000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4749000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	117012000	USD
CY2021Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	212838000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	134173000	USD
CY2021Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	10351000	USD
CY2020Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	9226000	USD
CY2021Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	24652000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	7242000	USD
CY2021Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	30118000	USD
CY2020Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	36530000	USD
CY2021Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	193606000	USD
CY2020Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	167504000	USD
CY2021Q3	us-gaap	Other Inventory OtherInventory	19561000	USD
CY2020Q3	us-gaap	Other Inventory OtherInventory	20406000	USD
CY2021Q3	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	8166000	USD
CY2020Q3	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	6639000	USD
CY2021Q3	us-gaap	Prepaid Taxes PrepaidTaxes	51211000	USD
CY2020Q3	us-gaap	Prepaid Taxes PrepaidTaxes	24301000	USD
CY2021Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	35251000	USD
CY2020Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	23310000	USD
CY2021Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	72840000	USD
CY2020Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	69444000	USD
CY2021Q3	us-gaap	Other Assets Current OtherAssetsCurrent	20235000	USD
CY2020Q3	us-gaap	Other Assets Current OtherAssetsCurrent	21029000	USD
CY2021Q3	us-gaap	Assets Current AssetsCurrent	634274000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	622332000	USD
CY2021Q3	us-gaap	Equity Method Investments EquityMethodInvestments	114529000	USD
CY2020Q3	us-gaap	Equity Method Investments EquityMethodInvestments	208375000	USD
CY2021Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	522099000	USD
CY2020Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	527459000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	173928000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	131769000	USD
CY2021Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	3403000	USD
CY2020Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	3349000	USD
CY2021Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	5029000	USD
CY2020Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	10060000	USD
CY2021Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	5582000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	4707000	USD
CY2021Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	49921000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	85657000	USD
CY2021Q3	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	874491000	USD
CY2020Q3	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	971376000	USD
CY2021Q3	us-gaap	Assets Assets	5722278000	USD
CY2020Q3	us-gaap	Assets Assets	5316477000	USD
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2.50
CY2021Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	2.50
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2021Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2021Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	95709662	shares
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	95949183	shares
CY2021Q3	us-gaap	Common Stock Value CommonStockValue	240644000	USD
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	240243000	USD
CY2021Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	502584000	USD
CY2020Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	491982000	USD
CY2021Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-34528000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-44315000	USD
CY2021Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	762313	shares
CY2020Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	148310	shares
CY2021Q3	us-gaap	Treasury Stock Value TreasuryStockValue	12448000	USD
CY2020Q3	us-gaap	Treasury Stock Value TreasuryStockValue	-8485000	USD
CY2021Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	934610000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	947501000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	1630862000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1643896000	USD
CY2021Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2162164000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2259466000	USD
CY2021Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	3793026000	USD
CY2020Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	3903362000	USD
CY2021Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	72840000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	27236000	USD
CY2021Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	377300000	USD
CY2020Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	125350000	USD
CY2021Q3	us-gaap	Gas Purchase Payable Current GasPurchasePayableCurrent	168697000	USD
CY2020Q3	us-gaap	Gas Purchase Payable Current GasPurchasePayableCurrent	95945000	USD
CY2021Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	861000	USD
CY2020Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	791000	USD
CY2021Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	225242000	USD
CY2020Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	141500000	USD
CY2021Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	34768000	USD
CY2020Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	31902000	USD
CY2021Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	3356000	USD
CY2020Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	2717000	USD
CY2021Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	28007000	USD
CY2020Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	26188000	USD
CY2021Q3	njr	Clean Energy Program Current CleanEnergyProgramCurrent	16308000	USD
CY2020Q3	njr	Clean Energy Program Current CleanEnergyProgramCurrent	15570000	USD
CY2021Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	87145000	USD
CY2020Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	33865000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4300000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	6724000	USD
CY2021Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	32586000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	25934000	USD
CY2021Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1051410000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	533722000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	163530000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	138081000	USD
CY2021Q3	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	3010000	USD
CY2020Q3	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	3332000	USD
CY2021Q3	njr	Deferred Gain Noncurrent DeferredGainNoncurrent	847000	USD
CY2020Q3	njr	Deferred Gain Noncurrent DeferredGainNoncurrent	1035000	USD
CY2021Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	13497000	USD
CY2020Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	13352000	USD
CY2021Q3	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	135012000	USD
CY2020Q3	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	150590000	USD
CY2021Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	169267000	USD
CY2020Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	237221000	USD
CY2021Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	193051000	USD
CY2020Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	196450000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	141363000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	95030000	USD
CY2021Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	46306000	USD
CY2020Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	33723000	USD
CY2021Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11959000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10579000	USD
CY2021Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	877842000	USD
CY2020Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	879393000	USD
CY2021Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5722278000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5316477000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1294664000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-15731000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3787000	USD
CY2019	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	16663000	USD
CY2019	njr	Stock Issued During Period Value Dividend Reinvestment Plan Waiver Discount StockIssuedDuringPeriodValueDividendReinvestmentPlanWaiverDiscount	57391000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.19
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	106342000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	-5232000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1381833000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-12528000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	212900000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3772000	USD
CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	18157000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.27
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	121582000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1663000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1643896000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	117890000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9787000	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-2823000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4263000	USD
CY2021	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	15156000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.36
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	130781000	USD
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	26526000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	1630862000	USD
CY2021	us-gaap	Nature Of Operations NatureOfOperations	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">1. NATURE OF THE BUSINESS </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">NJR provides regulated natural gas distribution services, transmission and storage services and operates certain unregulated businesses primarily through the following:</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">NJNG provides natural gas utility service to approximately 564,000 customers throughout Burlington, Middlesex, Monmouth, Morris, Ocean and Sussex counties in New Jersey and is subject to rate regulation by the BPU. NJNG comprises the Natural Gas Distribution segment.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">NJRCEV, the Company's clean energy subsidiary, comprises the Clean Energy Ventures segment and consists of the Company's capital investments in commercial and residential solar projects located in New Jersey and Connecticut.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">NJRES comprises the Energy Services segment. Energy Services maintains and transacts around a portfolio of natural gas transportation and storage capacity contracts and provides physical wholesale energy, retail energy and energy management services in the U.S. and Canada.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">NJR Midstream Holdings Corporation, which comprises the Storage and Transportation segment, invests in energy-related ventures through its subsidiaries. The Company operates natural gas storage and transmission assets through the wholly-owned subsidiaries of Leaf River, which was acquired on October 11, 2019 and Adelphia Gateway, which was acquired on January 13, 2020, and is subject to rate regulation by FERC. The Company holds a 50 percent combined ownership interest in Steckman Ridge, located in Pennsylvania and 20 percent ownership interest in PennEast, which are accounted for under the equity method of accounting. </span></div><div style="text-align:justify;text-indent:22.5pt"><span><br/></span></div><div style="text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">NJR Retail Holdings Corporation has two principal subsidiaries: NJRHS, which provides heating, central air conditioning, standby generators, solar and other indoor and outdoor comfort products to residential homes throughout New Jersey; and CR&R, which owns commercial real estate. NJRHS and CR&R are included in Home Services and Other operations.</span></div>
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires the Company to make estimates that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosure of contingencies during the reporting period. On a quarterly basis or more frequently whenever events or changes in circumstances indicate a need, the Company evaluates its estimates, including those related to the calculation of the fair value of derivative instruments, debt, equity method investments, unbilled revenues, allowance for doubtful accounts, provisions for depreciation and amortization, long-lived assets, regulatory assets and liabilities, income taxes, pensions and other postemployment benefits, contingencies related to environmental matters and litigation. ARO are evaluated as often as needed. The Company’s estimates are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has legal, regulatory and environmental proceedings during the normal course of business that can result in loss contingencies. When evaluating the potential for a loss, the Company will establish a reserve if a loss is probable and can be reasonably estimated, in which case it is the Company’s policy to accrue the full amount of such estimates. Where the information is sufficient only to establish a range of probable liability, and no point within the range is more likely than any other, it is the Company’s policy to accrue the lower end of the range. In the normal course of business, estimated amounts are subsequently adjusted to actual results that may differ from estimates.</span></div>In March 2020, COVID-19 was declared a pandemic by the World Health Organization and the Centers for Disease Control and Prevention and has spread globally, including throughout the U.S. The Company’s Consolidated Financial Statements reflect estimates and assumptions made by management that affect the reported amounts of assets and liabilities at the balance sheet date and reported amounts of revenue and expenses during the reporting periods presented. The Company considered the impacts of COVID-19 on the assumptions and estimates used and determined that there have been no material adverse impacts on the Company’s results of operations as of September 30, 2021.
CY2021	njr	Demand Fees DemandFees	243700000	USD
CY2020	njr	Demand Fees DemandFees	253700000	USD
CY2019	njr	Demand Fees DemandFees	239500000	USD
CY2020	njr	Deferred Interest DeferredInterest	511000	USD
CY2020Q4	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.26
CY2020Q4	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.26
CY2021	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0242
CY2019	njr	Deferred Interest DeferredInterest	760000	USD
CY2021	njr	Sbc Interest Rate SBCInterestRate	0.0168
CY2020	njr	Sbc Interest Rate SBCInterestRate	0.0197
CY2019	njr	Sbc Interest Rate SBCInterestRate	0.033
CY2021	njr	Deferred Interest DeferredInterest	346000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81100000	USD
CY2021Q3	njr	Public Utilities And Other Property Plantand Equipment Gross PublicUtilitiesAndOtherPropertyPlantandEquipmentGross	4997049000	USD
CY2020Q3	njr	Public Utilities And Other Property Plantand Equipment Gross PublicUtilitiesAndOtherPropertyPlantandEquipmentGross	4464966000	USD
CY2021Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	783536000	USD
CY2020	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0265
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0225
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111400000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107400000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	742197000	USD
CY2021Q3	njr	Public Utilities And Other Property Plantand Equipment Net PublicUtilitiesAndOtherPropertyPlantandEquipmentNet	4213513000	USD
CY2020Q3	njr	Public Utilities And Other Property Plantand Equipment Net PublicUtilitiesAndOtherPropertyPlantandEquipmentNet	3722769000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4749000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	117012000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2676000	USD
CY2021Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	1294000	USD
CY2020Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	2411000	USD
CY2019Q3	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	1387000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6043000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	119423000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4063000	USD
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="text-align:justify;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:115%">Allowance for Doubtful Accounts</span></div><div><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of October 1, 2020, the Company adopted ASU No. 2016-13, an amendment to ASC 326, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Financial Instruments - Credit Losses</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, which changes the impairment model for certain financial assets that have a contractual right to receive cash, including trade and loan receivables. The Company segregates financial assets that fall within the scope of ASC 326, primarily trade receivables and unbilled revenues due in one year or less, into portfolio segments based on shared risk characteristics, such as geographical location and regulatory environment, for evaluation of expected credit losses. Historical and current information, such as average write-offs, are applied to each portfolio segment to estimate the allowance for losses on uncollectible receivables. Additionally, the allowance for losses on uncollectible receivables is adjusted for reasonable and supportable forecasts of future economic conditions, which can include changing weather, commodity prices, regulations, and macroeconomic factors, such as unemployment rates among others.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Allowance for doubtful accounts was comprised of the following as of September 30:</span></div><div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"/><td style="width:74.449%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.613%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.638%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">(Thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">2020</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Natural Gas Distribution</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">(17,040)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(5,628)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Energy Services</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">(5,825)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(104)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Clean Energy Ventures</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">(1,787)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(1,504)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">NJR Home Services & Other</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(6)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">(24,652)</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(7,242)</span></td><td style="background-color:#cceeff;border-bottom:2pt solid #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div>In February 2021, severe winter weather affected the U.S. mid-continent and southern regions and resulted in increased demand for natural gas supply and increases in wholesale energy prices. As a result, Energy Services evaluated its counterparties for credit deterioration, as well as the related receivables for the purchase and receipt of natural gas for amounts past due. The Company examined the credit characteristics of its counterparties, including the history of past due amounts for contractual settlements, counterparty credit ratings, and the likelihood of recovering amounts owed.
CY2021Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	24652000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	7242000	USD
CY2021Q3	us-gaap	Notes And Loans Receivable Gross Noncurrent NotesAndLoansReceivableGrossNoncurrent	32300000	USD
CY2020Q3	us-gaap	Notes And Loans Receivable Gross Noncurrent NotesAndLoansReceivableGrossNoncurrent	35300000	USD
CY2021Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	193606000	USD
CY2021Q3	njr	Energy Related Inventory Natural Gasin Storage Bcf EnergyRelatedInventoryNaturalGasinStorageBCF	46.40	Bcf
CY2020Q3	us-gaap	Energy Related Inventory Natural Gas In Storage EnergyRelatedInventoryNaturalGasInStorage	167504000	USD
CY2020Q3	njr	Energy Related Inventory Natural Gasin Storage Bcf EnergyRelatedInventoryNaturalGasinStorageBCF	61.52	Bcf
CY2021	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	223000	USD
CY2020	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	50000	USD
CY2021Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	5582000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	4707000	USD
CY2021	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	447000	USD
CY2020	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	63000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5000000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2681000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2271000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	77000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	0	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	0	USD
CY2021	njr	Defined Benefit Plan Numberof Plans DefinedBenefitPlanNumberofPlans	2	plan
CY2021	njr	Defined Benefit Plan Numberof Medicaland Life Insurance Plans DefinedBenefitPlanNumberofMedicalandLifeInsurancePlans	2	plan
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reclassification</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain prior period amounts have been reclassified to conform to the current period presentation. Construction work in progress previously classified within various property classifications in the Property Plant and Equipment section of this note has been reclassified to its own category.</span></div><div style="text-align:justify;text-indent:24.75pt"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Change in Accounting Policy</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Effective October 1, 2020, the Company changed its method of accounting for ITCs at Clean Energy Ventures from the flow through method to the deferral method. Prior to the change, the Company recognized ITCs as a reduction of income tax expense in the period that the qualified solar energy property, to which it relates, was placed in service. Effective with the accounting change, the Company records ITCs as a reduction to the carrying value of the related asset when placed in service and recognizes ITCs in earnings as a reduction to depreciation expense over the productive life of the related property. The deferral method is considered the preferred method per the authoritative guidance as described in </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">ASC 740 - Income Taxes</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. The change to the deferral method is also consistent with the application of authoritative accounting guidance throughout other reporting segments and promotes proper matching of the benefits of the recognition of the ITC with the expected use of the asset.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company applied the change in accounting method retrospectively to all prior periods presented.</span></div>
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107368000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	1724759000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	228909000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	185190000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36494000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	95103000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.72
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.71
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81109000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	2427489000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	164556000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	128747000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18440000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	89596000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
CY2020Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	1108512000	USD
CY2020Q3	njr	Accumulated Depreciation Depletionand Amortization Other Property Plantand Equipment AccumulatedDepreciationDepletionandAmortizationOtherPropertyPlantandEquipment	140562000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1381833000	USD
CY2020Q3	njr	Public Utilities And Other Property Plantand Equipment Net PublicUtilitiesAndOtherPropertyPlantandEquipmentNet	3722769000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	85657000	USD
CY2020Q3	us-gaap	Assets Noncurrent Other Than Noncurrent Investments And Property Plant And Equipment AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment	971376000	USD
CY2020Q3	us-gaap	Assets Assets	5316477000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	947501000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1643896000	USD
CY2020Q3	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	3903362000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	138081000	USD
CY2020Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	879393000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5316477000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107368000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	34346000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81109000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2822000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1294664000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	134173000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1643896000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	852105000	USD
CY2021	njr	Alternative Revenue Programs Revenue AlternativeRevenueProgramsRevenue	-7282000	USD
CY2021	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1311364000	USD
CY2021	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1304508000	USD
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2156613000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	833677000	USD
CY2020	njr	Alternative Revenue Programs Revenue AlternativeRevenueProgramsRevenue	15750000	USD
CY2020	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1105357000	USD
CY2020	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1119991000	USD
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1953668000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	782331000	USD
CY2019	njr	Alternative Revenue Programs Revenue AlternativeRevenueProgramsRevenue	10364000	USD
CY2020	njr	Contractwith Customer Increase Decreasefor Unbilled Receivable ContractwithCustomerIncreaseDecreaseforUnbilledReceivable	2716000	USD
CY2020	njr	Contractwith Customer Increase Decreasefor Contract Liability ContractwithCustomerIncreaseDecreaseforContractLiability	-1182000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	1807588000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1809714000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2021	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1304508000	USD
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2156613000	USD
CY2020	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1119991000	USD
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1953668000	USD
CY2019	us-gaap	Revenue Not From Contract With Customer RevenueNotFromContractWithCustomer	1809714000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	139263000	USD
CY2019Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	6510000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27116000	USD
CY2020	njr	Contractwith Customer Increase Decreasefor Accounts Receivable ContractwithCustomerIncreaseDecreaseforAccountsReceivable	-5090000	USD
CY2020Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	9226000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	25934000	USD
CY2021	njr	Contractwith Customer Increase Decreasefor Accounts Receivable ContractwithCustomerIncreaseDecreaseforAccountsReceivable	78665000	USD
CY2021	njr	Contractwith Customer Increase Decreasefor Unbilled Receivable ContractwithCustomerIncreaseDecreaseforUnbilledReceivable	1125000	USD
CY2021	njr	Contractwith Customer Increase Decreasefor Contract Liability ContractwithCustomerIncreaseDecreaseforContractLiability	6652000	USD
CY2021Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	212838000	USD
CY2021Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	10351000	USD
CY2021Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	32586000	USD
CY2021Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	212838000	USD
CY2021Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	10351000	USD
CY2021Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	32586000	USD
CY2021Q3	njr	Contractwith Customer Assets Liabilities Net ContractwithCustomerAssetsLiabilitiesNet	190603000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	134173000	USD
CY2020Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	9226000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	25934000	USD
CY2020Q3	njr	Contractwith Customer Assets Liabilities Net ContractwithCustomerAssetsLiabilitiesNet	117465000	USD
CY2021	njr	Public Utilities Numberof Interim Filings During Each Fiscal Year PublicUtilitiesNumberofInterimFilingsDuringEachFiscalYear	2	filings
CY2021	njr	Public Utilities Numberof Days Noticefor Refund PublicUtilitiesNumberofDaysNoticeforRefund	P5D
CY2021	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	223000	USD
CY2020	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	50000	USD
CY2021	us-gaap	Concentration Risk Credit Risk Financial Instrument Maximum Exposure ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure	234987000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	20100000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	74200000	USD
CY2021	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	92000000	USD
CY2021Q3	us-gaap	Equity Method Investments EquityMethodInvestments	114529000	USD
CY2020Q3	us-gaap	Equity Method Investments EquityMethodInvestments	208375000	USD
CY2020	njr	Deferred Tax Asset Allowance For Funds Used During Construction DeferredTaxAssetAllowanceForFundsUsedDuringConstruction	4600000	USD
CY2021	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	92000000	USD
CY2021	njr	Equity Method Investment Other Than Temporary Impairment Net Of Tax EquityMethodInvestmentOtherThanTemporaryImpairmentNetOfTax	74500000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	117890000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	96227000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94798000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	89242000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.23
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.72
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	96227000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94798000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	89242000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	333000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	305000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	354000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	96560000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	95103000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	89596000	shares
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.22
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.71
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	74000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2021Q3	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.0401
CY2021Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2162164000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2259466000	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	3102764	shares
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7149000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6536000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9796000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1613000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1900000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2848000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	5536000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	4636000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	6948000	USD
CY2021	njr	Share Based Payment Arrangement Delivered Shares Expense Tax Benefit ShareBasedPaymentArrangementDeliveredSharesExpenseTaxBenefit	159000	USD
CY2020	njr	Share Based Payment Arrangement Delivered Shares Expense Tax Benefit ShareBasedPaymentArrangementDeliveredSharesExpenseTaxBenefit	-647000	USD
CY2019	njr	Share Based Payment Arrangement Delivered Shares Expense Tax Benefit ShareBasedPaymentArrangementDeliveredSharesExpenseTaxBenefit	-1300000	USD
CY2021	njr	Defined Benefit Plan Numberof Plans DefinedBenefitPlanNumberofPlans	2	plan
CY2021	njr	Defined Benefit Plan Required Lengthof Service DefinedBenefitPlanRequiredLengthofService	P1Y
CY2021	njr	Defined Benefit Plan Benefits Basis Period DefinedBenefitPlanBenefitsBasisPeriod	P60M
CY2021Q3	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1
CY2021Q3	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2020Q3	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2021Q3	us-gaap	Prescription Drug Subsidy Receipts Next Twelve Months PrescriptionDrugSubsidyReceiptsNextTwelveMonths	314000	USD
CY2021Q3	us-gaap	Prescription Drug Subsidy Receipts Year Two1 PrescriptionDrugSubsidyReceiptsYearTwo1	350000	USD
CY2021Q3	us-gaap	Prescription Drug Subsidy Receipts Year Three1 PrescriptionDrugSubsidyReceiptsYearThree1	388000	USD
CY2021Q3	us-gaap	Prescription Drug Subsidy Receipts Year Four1 PrescriptionDrugSubsidyReceiptsYearFour1	425000	USD
CY2021Q3	us-gaap	Prescription Drug Subsidy Receipts Year Five1 PrescriptionDrugSubsidyReceiptsYearFive1	466000	USD
CY2021Q3	us-gaap	Prescription Drug Subsidy Receipts After Year Five PrescriptionDrugSubsidyReceiptsAfterYearFive	3099000	USD
CY2021	njr	Defined Contribution Plan Company Match Of Employee Contribution DefinedContributionPlanCompanyMatchOfEmployeeContribution	0.85
CY2021	njr	Future Accretion Year Two FutureAccretionYearTwo	2092000	USD
CY2021	njr	Defined Contribution Plan Maximum Employer Contribution By Percentage Of Employee Salary DefinedContributionPlanMaximumEmployerContributionByPercentageOfEmployeeSalary	0.06
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5100000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4500000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3900000	USD
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	2100000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1600000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	1300000	USD
CY2021	njr	Future Accretion Year One FutureAccretionYearOne	2012000	USD
CY2021	njr	Future Accretion Year Three FutureAccretionYearThree	2174000	USD
CY2021	njr	Future Accretion Year Four FutureAccretionYearFour	2255000	USD
CY2021	njr	Future Accretion Year Five FutureAccretionYearFive	2339000	USD
CY2021	njr	Future Accretion FutureAccretion	10872000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	651000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2164000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10933000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1703000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6763000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3530000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	25030000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	28817000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4103000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6224000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3400000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4003000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	322000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	322000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	4129000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33286000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36494000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18440000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	225036000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	194840000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	0	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	24091000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	38108000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	33233000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	16333000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	13979000	USD
CY2021Q3	njr	Deferred Tax Asset Impairment Of Equity Method Investment DeferredTaxAssetImpairmentOfEquityMethodInvestment	15395000	USD
CY2020Q3	njr	Deferred Tax Asset Impairment Of Equity Method Investment DeferredTaxAssetImpairmentOfEquityMethodInvestment	0	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	9665000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	8544000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	6894000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	7071000	USD
CY2021Q3	njr	Deferred Tax Assets Amortizationof Intangibles DeferredTaxAssetsAmortizationofIntangibles	6540000	USD
CY2020Q3	njr	Deferred Tax Assets Amortizationof Intangibles DeferredTaxAssetsAmortizationofIntangibles	5892000	USD
CY2021Q3	njr	Deferred Tax Assets Overrecovered Natural Gas Costs DeferredTaxAssetsOverrecoveredNaturalGasCosts	1540000	USD
CY2020Q3	njr	Deferred Tax Assets Overrecovered Natural Gas Costs DeferredTaxAssetsOverrecoveredNaturalGasCosts	7244000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	6561000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1922000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6140000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	448000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	332212000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	297264000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	23613000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	17639000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	308599000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	279625000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	419753000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	359604000	USD
CY2021Q3	njr	Deferred Tax Liabilities Remediation Costs DeferredTaxLiabilitiesRemediationCosts	16347000	USD
CY2020Q3	njr	Deferred Tax Liabilities Remediation Costs DeferredTaxLiabilitiesRemediationCosts	10207000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	21739000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	23395000	USD
CY2021Q3	njr	Deferred Tax Liabilities Conservation Incentive Plan DeferredTaxLiabilitiesConservationIncentivePlan	3309000	USD
CY2020Q3	njr	Deferred Tax Liabilities Conservation Incentive Plan DeferredTaxLiabilitiesConservationIncentivePlan	5345000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	6203000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	6639000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	467351000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	405190000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	158752000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	125565000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31747000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	41896000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	29898000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	322000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	322000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	4129000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-5366000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-5362000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-6349000	USD
CY2021	njr	Effective Income Tax Rate Reconciliation Equity In Allowance For Funds Used During Construction EffectiveIncomeTaxRateReconciliationEquityInAllowanceForFundsUsedDuringConstruction	786000	USD
CY2020	njr	Effective Income Tax Rate Reconciliation Equity In Allowance For Funds Used During Construction EffectiveIncomeTaxRateReconciliationEquityInAllowanceForFundsUsedDuringConstruction	4933000	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Equity In Allowance For Funds Used During Construction EffectiveIncomeTaxRateReconciliationEquityInAllowanceForFundsUsedDuringConstruction	2313000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6124000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	11965000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6262000	USD
CY2021	njr	Effective Income Tax Rate Reconciliation Unitary Method Change EffectiveIncomeTaxRateReconciliationUnitaryMethodChange	0	USD
CY2020	njr	Effective Income Tax Rate Reconciliation Unitary Method Change EffectiveIncomeTaxRateReconciliationUnitaryMethodChange	-15345000	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Unitary Method Change EffectiveIncomeTaxRateReconciliationUnitaryMethodChange	0	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	5974000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	13604000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2021	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Amortized EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesAmortized	-3573000	USD
CY2020	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Amortized EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesAmortized	-3573000	USD
CY2019	njr	Effective Income Tax Rate Reconciliation Tax Act Utility Excess Deferred Income Taxes Amortized EffectiveIncomeTaxRateReconciliationTaxActUtilityExcessDeferredIncomeTaxesAmortized	-3573000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-512000	USD
CY2021	njr	Finance Lease Cost FinanceLeaseCost	4152000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1041000	USD
CY2020	njr	Finance Lease Cost FinanceLeaseCost	6518000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	543000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1436000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1356000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33286000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36494000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18440000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.220
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.183
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.140
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4930000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4930000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4930000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4930000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	1381000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	17600000	USD
CY2019Q4	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.30
CY2019Q4	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.30
CY2020Q4	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.26
CY2021Q3	njr	Old Age Survivors And Disability Insurance Tax Employer Deferral Cares Act OldAgeSurvivorsAndDisabilityInsuranceTaxEmployerDeferralCARESAct	5100000	USD
CY2020Q3	njr	Old Age Survivors And Disability Insurance Tax Employer Deferral Cares Act OldAgeSurvivorsAndDisabilityInsuranceTaxEmployerDeferralCARESAct	3100000	USD
CY2020Q3	njr	Deferred Tax Assets Operating Loss Carryforwards Domestic Refundableand Receivables DeferredTaxAssetsOperatingLossCarryforwardsDomesticRefundableandReceivables	22800000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	24100000	USD
CY2021Q3	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	224200000	USD
CY2020Q3	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	195200000	USD
CY2021	njr	Operating Loss Carryforward Expiration Terms OperatingLossCarryforwardExpirationTerms	P20Y
CY2020Q4	njr	Investment Tax Credit Solar Property Percentage InvestmentTaxCreditSolarPropertyPercentage	0.26
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	8182000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	6404000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3442000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	5007000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	710000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1511000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	1025000	USD
CY2021	us-gaap	Lease Cost LeaseCost	14258000	USD
CY2020	us-gaap	Lease Cost LeaseCost	14988000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	6675000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	8804000	USD
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	1167000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	1189000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8180000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	6985000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	46100000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	76600000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	49700000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	173928000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	131769000	USD
CY2021Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	13489000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	71085000	USD
CY2021Q3	njr	Lease Right Of Use Asset LeaseRightOfUseAsset	187417000	USD
CY2020Q3	njr	Lease Right Of Use Asset LeaseRightOfUseAsset	202854000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4300000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	6724000	USD
CY2021Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	5393000	USD
CY2020Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	10416000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	141363000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	95030000	USD
CY2021Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	14742000	USD
CY2020Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	63743000	USD
CY2021Q3	njr	Lease Liability LeaseLiability	165798000	USD
CY2020Q3	njr	Lease Liability LeaseLiability	175913000	USD
CY2021Q2	us-gaap	Payments To Acquire Buildings PaymentsToAcquireBuildings	41100000	USD
CY2021Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P29Y7M6D
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P25Y6M
CY2021Q3	us-gaap	Lessee Operating Lease Discount Rate LesseeOperatingLeaseDiscountRate	0.032
CY2021Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y4M24D
CY2020Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y6M
CY2021Q3	us-gaap	Lessee Finance Lease Discount Rate LesseeFinanceLeaseDiscountRate	0.035
CY2020Q3	us-gaap	Lessee Finance Lease Discount Rate LesseeFinanceLeaseDiscountRate	0.025
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	7564000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	6004000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	8022000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	4622000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	7667000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	5279000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	7127000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	3396000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7034000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	2324000	USD
CY2021Q3	njr	Lessee Operating Lease Liability To Be Paid After Year Five LesseeOperatingLeaseLiabilityToBePaidAfterYearFive	196471000	USD
CY2021	njr	Site Contingency Recoveryfrom Third Partyof Environmental Remediation Cost Period SiteContingencyRecoveryfromThirdPartyofEnvironmentalRemediationCostPeriod	P7Y
CY2021Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	233885000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	21625000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	88222000	USD
CY2021Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	1490000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	145663000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	20135000	USD
CY2021	njr	Current Charges Recoverable Through Bgss CurrentChargesRecoverableThroughBgss	168500000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	502903000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	206831000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	167181000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Fourth Year PurchaseObligationDueInFourthYear	156101000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Fifth Year PurchaseObligationDueInFifthYear	140434000	USD
CY2021Q3	us-gaap	Purchase Obligation Due After Fifth Year PurchaseObligationDueAfterFifthYear	1087330000	USD
CY2021Q3	njr	Lessee Operating Lease Liability Payments Due Next Five Years LesseeOperatingLeaseLiabilityPaymentsDueNextFiveYears	8000000	USD
CY2021Q3	njr	Lessee Operating Lease Liability To Be Paid After Year Five LesseeOperatingLeaseLiabilityToBePaidAfterYearFive	196500000	USD
CY2019Q4	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	6545454	shares
CY2019Q4	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	212900000	USD
CY2021	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2156613000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	2959000	USD
CY2020	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	1953668000	USD
CY2019	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2592045000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111387000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107368000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	81109000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	2167000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	1623000	USD
CY2021	us-gaap	Interest Expense InterestExpense	78559000	USD
CY2020	us-gaap	Interest Expense InterestExpense	67597000	USD
CY2019	us-gaap	Interest Expense InterestExpense	47082000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33286000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36494000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18440000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-83212000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	14311000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13628000	USD
CY2021	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	207712000	USD
CY2020	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	165333000	USD
CY2019	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	129390000	USD
CY2021	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	624610000	USD
CY2020	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	448109000	USD
CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	525932000	USD
CY2021	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	690000	USD
CY2020	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2117000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	4102000	USD
CY2021Q3	us-gaap	Assets Assets	5722278000	USD
CY2020Q3	us-gaap	Assets Assets	5316477000	USD
CY2019Q3	us-gaap	Assets Assets	4157942000	USD
CY2021	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	207712000	USD
CY2020	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	165333000	USD
CY2019	njr	Net Financial Earnings Loss NetFinancialEarningsLoss	129390000	USD
CY2021	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-54203000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	9644000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-2881000	USD
CY2021	njr	Unrealized Gain Losson Derivativesand Commodity Contracts Tax UnrealizedGainLossonDerivativesandCommodityContractsTax	-12887000	USD
CY2020	njr	Unrealized Gain Losson Derivativesand Commodity Contracts Tax UnrealizedGainLossonDerivativesandCommodityContractsTax	2296000	USD
CY2019	njr	Unrealized Gain Losson Derivativesand Commodity Contracts Tax UnrealizedGainLossonDerivativesandCommodityContractsTax	-711000	USD
CY2021	njr	Increase Decreasein Economic Hedging Relatedto Natural Gas Inventory Before Taxes IncreaseDecreaseinEconomicHedgingRelatedtoNaturalGasInventoryBeforeTaxes	42405000	USD
CY2020	njr	Increase Decreasein Economic Hedging Relatedto Natural Gas Inventory Before Taxes IncreaseDecreaseinEconomicHedgingRelatedtoNaturalGasInventoryBeforeTaxes	-12690000	USD
CY2019	njr	Increase Decreasein Economic Hedging Relatedto Natural Gas Inventory Before Taxes IncreaseDecreaseinEconomicHedgingRelatedtoNaturalGasInventoryBeforeTaxes	-4309000	USD
CY2021	njr	Effectsof Economic Hedging Relatedto Natural Gas Inventory Tax EffectsofEconomicHedgingRelatedtoNaturalGasInventoryTax	10078000	USD
CY2020	njr	Effectsof Economic Hedging Relatedto Natural Gas Inventory Tax EffectsofEconomicHedgingRelatedtoNaturalGasInventoryTax	-3016000	USD
CY2019	njr	Effectsof Economic Hedging Relatedto Natural Gas Inventory Tax EffectsofEconomicHedgingRelatedtoNaturalGasInventoryTax	-1024000	USD
CY2021	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	92000000	USD
CY2020	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2019	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2021	njr	Equity Method Investment Other Than Temporary Impairment Tax EquityMethodInvestmentOtherThanTemporaryImpairmentTax	-11167000	USD
CY2020	njr	Equity Method Investment Other Than Temporary Impairment Tax EquityMethodInvestmentOtherThanTemporaryImpairmentTax	0	USD
CY2019	njr	Equity Method Investment Other Than Temporary Impairment Tax EquityMethodInvestmentOtherThanTemporaryImpairmentTax	0	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	117890000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	163007000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	123935000	USD
CY2021	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	7013000	USD
CY2020	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	6083000	USD
CY2019	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	7948000	USD
CY2021Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	861000	USD
CY2020Q3	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	791000	USD
CY2021	njr	Numberof Asset Management Agreement NumberofAssetManagementAgreement	2	lease

Files In Submission

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$NJR
NEW JERSEY RESOURCES CORP Stock $njr

2021 Q3 Form 10-K Financial Statement

#000035630921000095 Filed on November 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

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$NJR NEW JERSEY RESOURCES CORP Stock $njr

2021 Q3 Form 10-K Financial Statement

#000035630921000095 Filed on November 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NJR
NEW JERSEY RESOURCES CORP Stock $njr