$ED
CONSOLIDATED EDISON INC Stock $ed

$ed Overview Financials Valuation SEC Filings Company Website

2020 Form 10-K Financial Statement

#000104786221000049 Filed on February 18, 2021

Income Statement

Concept	2020	2019 Q4	2019
Revenue	$12.25B	$2.951B	$12.57B
YoY Change	-2.61%	0.07%	1.92%
Cost Of Revenue	$2.127B	$552.0M	$2.426B
YoY Change	-12.32%	-16.62%	-9.65%
Gross Profit	$10.12B	$2.399B	$10.15B
YoY Change	-0.29%	4.9%	5.14%
Gross Profit Margin	82.63%	81.29%	80.71%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$24.00M		$24.00M
YoY Change	0.0%		0.0%
% of Gross Profit	0.24%		0.24%
Depreciation & Amortization	$1.920B	$431.0M	$1.684B
YoY Change	14.01%	14.32%	17.11%
% of Gross Profit	18.97%	17.97%	16.59%
Operating Expenses	$9.592B	$1.834B	$9.898B
YoY Change	-3.09%	4.15%	0.96%
Operating Profit	$2.654B	$565.0M	$2.676B
YoY Change	-0.82%	7.41%	0.45%
Interest Expense	$1.019B	-$199.0M	$991.0M
YoY Change	2.83%	11.8%	21.0%
% of Operating Profit	38.39%	-35.22%	37.03%
Other Income/Expense, Net	-$401.0M	$0.00	$51.00M
YoY Change	-886.27%	-100.0%	-182.26%
Pretax Income	$1.234B	$366.0M	$1.736B
YoY Change	-28.92%	-8.96%	-2.64%
Income Tax	$90.00M	$53.00M	$296.0M
% Of Pretax Income	7.29%	14.48%	17.05%
Net Earnings	$1.101B	$295.0M	$1.343B
YoY Change	-18.02%	-10.88%	-2.82%
Net Earnings / Revenue	8.99%	10.0%	10.68%
Basic Earnings Per Share	$3.29		$4.09
Diluted Earnings Per Share	$3.28	$885.6K	$4.08
COMMON SHARES
Basic Shares Outstanding	334.8M shares	332.4M shares	328.5M shares
Diluted Shares Outstanding	335.7M shares		329.5M shares

Balance Sheet

Concept	2020	2019 Q4	2019
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.272B	$981.0M	$981.0M
YoY Change	29.66%	9.61%	9.61%
Cash & Equivalents	$1.272B	$981.0M	$981.0M
Short-Term Investments
Other Short-Term Assets	$1.531B	$200.0M	$1.423B
YoY Change	7.59%	63.93%	40.89%
Inventory	$356.0M	$352.0M	$352.0M
Prepaid Expenses		$260.0M
Receivables	$1.701B	$1.236B	$1.236B
Other Receivables	$441.0M	$280.0M	$280.0M
Total Short-Term Assets	$5.301B	$4.272B	$4.272B
YoY Change	24.09%	10.56%	10.56%
LONG-TERM ASSETS
Property, Plant & Equipment	$47.39B	$43.89B	$44.75B
YoY Change	5.91%	5.13%	7.18%
Goodwill		$446.0M
YoY Change		1.36%
Intangibles		$1.557B
YoY Change		-5.86%
Long-Term Investments	$1.259B	$2.065B	$1.587B
YoY Change	-20.67%		16.26%
Other Assets	$7.037B	$7.853B	$5.471B
YoY Change	28.62%	20.06%	12.85%
Total Long-Term Assets	$57.59B	$53.81B	$53.81B
YoY Change	7.04%	7.49%	7.49%
TOTAL ASSETS
Total Short-Term Assets	$5.301B	$4.272B	$4.272B
Total Long-Term Assets	$57.59B	$53.81B	$53.81B
Total Assets	$62.90B	$58.08B	$58.08B
YoY Change	8.29%	7.71%	7.71%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.475B	$1.164B	$1.164B
YoY Change	26.72%	-1.94%	-1.94%
Accrued Expenses	$353.0M	$320.0M	$320.0M
YoY Change	10.31%	34.45%	34.45%
Deferred Revenue
YoY Change
Short-Term Debt	$1.870B	$0.00	$1.692B
YoY Change	10.52%	-100.0%	-34.06%
Long-Term Debt Due	$1.968B	$1.446B	$1.446B
YoY Change	36.1%	122.46%	122.46%
Total Short-Term Liabilities	$7.354B	$6.287B	$6.287B
YoY Change	16.97%	1.29%	1.29%
LONG-TERM LIABILITIES
Long-Term Debt	$20.38B	$18.53B	$18.53B
YoY Change	10.02%	5.9%	5.9%
Other Long-Term Liabilities	$9.617B	$8.824B	$8.824B
YoY Change	8.99%	16.74%	16.74%
Total Long-Term Liabilities	$30.00B	$15.05B	$27.35B
YoY Change	9.68%	12.5%	9.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$7.354B	$6.287B	$6.287B
Total Long-Term Liabilities	$30.00B	$15.05B	$27.35B
Total Liabilities	$44.05B	$21.34B	$40.06B
YoY Change	9.96%	8.95%	7.7%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$18.85B	$18.02B	$18.02B
YoY Change
Total Liabilities & Shareholders Equity	$62.90B	$58.08B	$58.08B
YoY Change	8.29%	7.71%	7.71%

Cashflow Statement

Concept	2020	2019 Q4	2019
OPERATING ACTIVITIES
Net Income	$1.101B	$295.0M	$1.343B
YoY Change	-18.02%	-10.88%	-2.82%
Depreciation, Depletion And Amortization	$1.920B	$431.0M	$1.684B
YoY Change	14.01%	14.32%	17.11%
Cash From Operating Activities	$2.198B	$1.174B	$3.134B
YoY Change	-29.87%	7.21%	16.29%
INVESTING ACTIVITIES
Capital Expenditures	$4.085B	-$971.0M	$3.676B
YoY Change	11.13%	-0.51%	-29.97%
Acquisitions	$0.00		$0.00
YoY Change			-100.0%
Other Investing Activities	-$22.00M	$73.00M	-$22.00M
YoY Change	0.0%	-104.72%	-35.29%
Cash From Investing Activities	-$4.224B	-$898.0M	-$3.782B
YoY Change	11.69%	-64.42%	-30.87%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$640.0M		$825.0M
YoY Change	-22.42%		17.02%
Debt Paid & Issued, Net	$518.0M		$1.195B
YoY Change	-56.65%		-38.34%
Cash From Financing Activities	$2.245B	688.0M	$859.0M
YoY Change	161.35%	-68.58%	-70.76%
NET CHANGE
Cash From Operating Activities	$2.198B	1.174B	$3.134B
Cash From Investing Activities	-$4.224B	-898.0M	-$3.782B
Cash From Financing Activities	$2.245B	688.0M	$859.0M
Net Change In Cash	$219.0M	964.0M	$211.0M
YoY Change	3.79%	26.68%	30.25%
FREE CASH FLOW
Cash From Operating Activities	$2.198B	$1.174B	$3.134B
Capital Expenditures	$4.085B	-$971.0M	$3.676B
Free Cash Flow	-$1.887B	$2.145B	-$542.0M
YoY Change	248.15%	3.57%	-78.78%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001047862
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P2Y
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-14514
CY2020	dei	Entity Registrant Name EntityRegistrantName	Consolidated Edison, Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3965100
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	4 Irving Place,
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	New York,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10003
CY2020	dei	City Area Code CityAreaCode	(212)
CY2020	dei	Local Phone Number LocalPhoneNumber	460-4600
CY2020	dei	Trading Symbol TradingSymbol	ED
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Security12b Title Security12bTitle	Common Shares ($.10 par value)
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	24000000000.0	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	342419162	shares
CY2020	us-gaap	Revenues Revenues	12246000000	USD
CY2019	us-gaap	Revenues Revenues	12574000000	USD
CY2018	us-gaap	Revenues Revenues	12337000000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1920000000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1684000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1438000000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	2575000000	USD
CY2019	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	2406000000	USD
CY2018	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	2266000000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	9592000000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	9898000000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	9804000000	USD
CY2020	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2019	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	-214000000	USD
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	96000000	USD
CY2018	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	131000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2654000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	2676000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	2664000000	USD
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	119000000	USD
CY2020	us-gaap	Other Income OtherIncome	23000000	USD
CY2019	us-gaap	Other Income OtherIncome	45000000	USD
CY2018	us-gaap	Other Income OtherIncome	17000000	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	17000000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	14000000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	12000000	USD
CY2020	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	227000000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	104000000	USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	210000000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-401000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	51000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-62000000	USD
CY2020	ed	Income Before Interest Income Interest Expense And Income Taxes IncomeBeforeInterestIncomeInterestExpenseAndIncomeTaxes	2253000000	USD
CY2019	ed	Income Before Interest Income Interest Expense And Income Taxes IncomeBeforeInterestIncomeInterestExpenseAndIncomeTaxes	2727000000	USD
CY2018	ed	Income Before Interest Income Interest Expense And Income Taxes IncomeBeforeInterestIncomeInterestExpenseAndIncomeTaxes	2602000000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	915000000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	888000000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	780000000	USD
CY2020	us-gaap	Interest Expense Other InterestExpenseOther	118000000	USD
CY2019	us-gaap	Interest Expense Other InterestExpenseOther	116000000	USD
CY2018	us-gaap	Interest Expense Other InterestExpenseOther	49000000	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	14000000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	13000000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	10000000	USD
CY2020	us-gaap	Interest Expense InterestExpense	1019000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	991000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	819000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1234000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1736000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1783000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	90000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	296000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	401000000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1144000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1440000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	1382000000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	43000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	97000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1101000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1343000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1382000000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.29
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.09
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.43
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.28
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.08
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.42
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	334800000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	328500000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	311700000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	335700000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	329500000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	312900000	shares
CY2020	us-gaap	Profit Loss ProfitLoss	1144000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1440000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	1382000000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	43000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	97000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	6000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	5000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-10000000	USD
CY2020	ed	Other Comprehensive Income Loss Other Income After Tax OtherComprehensiveIncomeLossOtherIncomeAfterTax	0	USD
CY2019	ed	Other Comprehensive Income Loss Other Income After Tax OtherComprehensiveIncomeLossOtherIncomeAfterTax	2000000	USD
CY2018	ed	Other Comprehensive Income Loss Other Income After Tax OtherComprehensiveIncomeLossOtherIncomeAfterTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10000000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1095000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1340000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1392000000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1144000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1440000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	1382000000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1920000000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1684000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1438000000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	320000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	85000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	308000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	408000000	USD
CY2020	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-40000000	USD
CY2019	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-116000000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-117000000	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	17000000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	14000000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	12000000	USD
CY2020	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-57000000	USD
CY2019	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-27000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-8000000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	14000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2020	ed	Contractwith Customer Liability Unbilled Revenue Accruals And Deferrals ContractwithCustomerLiabilityUnbilledRevenueAccrualsAndDeferrals	1000000	USD
CY2019	ed	Contractwith Customer Liability Unbilled Revenue Accruals And Deferrals ContractwithCustomerLiabilityUnbilledRevenueAccrualsAndDeferrals	3000000	USD
CY2018	ed	Contractwith Customer Liability Unbilled Revenue Accruals And Deferrals ContractwithCustomerLiabilityUnbilledRevenueAccrualsAndDeferrals	-18000000	USD
CY2020	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2019	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2018	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	131000000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-127000000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	18000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-115000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	543000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-23000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	140000000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	4000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-6000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	20000000	USD
CY2020	ed	Increase Decrease In Revenue Decoupling Mechanism Receivables IncreaseDecreaseInRevenueDecouplingMechanismReceivables	61000000	USD
CY2019	ed	Increase Decrease In Revenue Decoupling Mechanism Receivables IncreaseDecreaseInRevenueDecouplingMechanismReceivables	76000000	USD
CY2018	ed	Increase Decrease In Revenue Decoupling Mechanism Receivables IncreaseDecreaseInRevenueDecouplingMechanismReceivables	0	USD
CY2020	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	134000000	USD
CY2019	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-54000000	USD
CY2018	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	62000000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	6000000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-29000000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-27000000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	11000000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	73000000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	7000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	170000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	10000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-46000000	USD
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	285000000	USD
CY2019	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	357000000	USD
CY2018	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	325000000	USD
CY2020	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	478000000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	357000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	479000000	USD
CY2020	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	74000000	USD
CY2019	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	10000000	USD
CY2018	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	-49000000	USD
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-4000000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	24000000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-35000000	USD
CY2020	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-22000000	USD
CY2019	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-9000000	USD
CY2018	us-gaap	Other Increase Decrease In Environmental Liabilities OtherIncreaseDecreaseInEnvironmentalLiabilities	-19000000	USD
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	39000000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	57000000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	107000000	USD
CY2020	ed	Increase Decreasein System Benefit Charge Liability IncreaseDecreaseinSystemBenefitChargeLiability	-119000000	USD
CY2019	ed	Increase Decreasein System Benefit Charge Liability IncreaseDecreaseinSystemBenefitChargeLiability	20000000	USD
CY2018	ed	Increase Decreasein System Benefit Charge Liability IncreaseDecreaseinSystemBenefitChargeLiability	92000000	USD
CY2020	us-gaap	Increase Decrease In Deferred Charges IncreaseDecreaseInDeferredCharges	653000000	USD
CY2019	us-gaap	Increase Decrease In Deferred Charges IncreaseDecreaseInDeferredCharges	492000000	USD
CY2018	us-gaap	Increase Decrease In Deferred Charges IncreaseDecreaseInDeferredCharges	393000000	USD
CY2020	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	10000000	USD
CY2019	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	278000000	USD
CY2018	us-gaap	Increase Decrease In Deferred Liabilities IncreaseDecreaseInDeferredLiabilities	436000000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	60000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-21000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-151000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2198000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3134000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2695000000	USD
CY2020	us-gaap	Payments For Construction In Process PaymentsForConstructionInProcess	3326000000	USD
CY2019	us-gaap	Payments For Construction In Process PaymentsForConstructionInProcess	3238000000	USD
CY2018	us-gaap	Payments For Construction In Process PaymentsForConstructionInProcess	3251000000	USD
CY2020	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	310000000	USD
CY2019	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	295000000	USD
CY2018	us-gaap	Payments For Proceeds From Removal Costs PaymentsForProceedsFromRemovalCosts	258000000	USD
CY2020	ed	Payments Non Utility Construction Expenditures PaymentsNonUtilityConstructionExpenditures	583000000	USD
CY2019	ed	Payments Non Utility Construction Expenditures PaymentsNonUtilityConstructionExpenditures	248000000	USD
CY2018	ed	Payments Non Utility Construction Expenditures PaymentsNonUtilityConstructionExpenditures	246000000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1488000000	USD
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	192000000	USD
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	5000000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-22000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-22000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-34000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4224000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3782000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5471000000	USD
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	178000000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-874000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	1989000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2925000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3017000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3030000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	518000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1195000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1938000000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	47000000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	32000000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	61000000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	975000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	924000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	842000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	640000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	825000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	705000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	58000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	54000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	53000000	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	16000000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	12000000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	-2000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2245000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	859000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2938000000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	219000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	211000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	162000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1217000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1006000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	844000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1436000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1217000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1006000000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	920000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	876000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	805000000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	38000000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-26000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
CY2020	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	478000000	USD
CY2019	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	336000000	USD
CY2018	us-gaap	Construction In Progress Expenditures Incurred But Not Yet Paid ConstructionInProgressExpendituresIncurredButNotYetPaid	369000000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	48000000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	47000000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	47000000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	568000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1272000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	981000000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	148000000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	70000000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1701000000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1236000000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	7000000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	4000000	USD
CY2020Q4	us-gaap	Other Receivables OtherReceivables	278000000	USD
CY2019Q4	us-gaap	Other Receivables OtherReceivables	184000000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	26000000	USD
CY2019Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	20000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	599000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	599000000	USD
CY2020Q4	ed	Energy Related Inventory Fuel Oil Gas And Materials And Supplies Cost EnergyRelatedInventoryFuelOilGasAndMaterialsAndSuppliesCost	356000000	USD
CY2019Q4	ed	Energy Related Inventory Fuel Oil Gas And Materials And Supplies Cost EnergyRelatedInventoryFuelOilGasAndMaterialsAndSuppliesCost	352000000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	271000000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	260000000	USD
CY2020Q4	ed	Revenue Decoupling Mechanism Receivable RevenueDecouplingMechanismReceivable	137000000	USD
CY2020Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	266000000	USD
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	128000000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	164000000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	236000000	USD
CY2019Q4	ed	Revenue Decoupling Mechanism Receivable RevenueDecouplingMechanismReceivable	76000000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	231000000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	200000000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	5301000000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	4272000000	USD
CY2020Q4	us-gaap	Long Term Investments LongTermInvestments	1816000000	USD
CY2019Q4	us-gaap	Long Term Investments LongTermInvestments	2065000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Common PublicUtilitiesPropertyPlantAndEquipmentCommon	3880000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Common PublicUtilitiesPropertyPlantAndEquipmentCommon	3562000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	50738000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	48136000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	11188000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	10322000000	USD
CY2020Q4	ed	Net Utility Plant NetUtilityPlant	39550000000	USD
CY2019Q4	ed	Net Utility Plant NetUtilityPlant	37814000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	2474000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	1937000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	42024000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	39751000000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	522000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	391000000	USD
CY2020Q4	ed	Non Utility Property Net NonUtilityPropertyNet	3893000000	USD
CY2019Q4	ed	Non Utility Property Net NonUtilityPropertyNet	3829000000	USD
CY2020Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	638000000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	309000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	46555000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43889000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	446000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	446000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	228000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	126000000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1460000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1557000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	837000000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	6195000000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	4859000000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	285000000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	134000000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	9223000000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	7853000000	USD
CY2020Q4	us-gaap	Assets Assets	62895000000	USD
CY2019Q4	us-gaap	Assets Assets	58079000000	USD
CY2020Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	1967000000	USD
CY2019Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	1446000000	USD
CY2020Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	36000000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	165000000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2020Q4	us-gaap	Notes Payable Current NotesPayableCurrent	1705000000	USD
CY2019Q4	us-gaap	Notes Payable Current NotesPayableCurrent	1692000000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1475000000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1164000000	USD
CY2020Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	311000000	USD
CY2019Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	346000000	USD
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	150000000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	76000000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	149000000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	153000000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	108000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	102000000	USD
CY2020Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	238000000	USD
CY2019Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	123000000	USD
CY2019Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	102000000	USD
CY2020Q4	ed	System Benefits Charge Liability Current SystemBenefitsChargeLiabilityCurrent	528000000	USD
CY2019Q4	ed	System Benefits Charge Liability Current SystemBenefitsChargeLiabilityCurrent	647000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	96000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	65000000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	426000000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	371000000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	7354000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	6287000000	USD
CY2020Q4	ed	Provision For Injuries And Damages ProvisionForInjuriesAndDamages	178000000	USD
CY2019Q4	ed	Provision For Injuries And Damages ProvisionForInjuriesAndDamages	130000000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	2257000000	USD
CY2019Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	1516000000	USD
CY2020Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	857000000	USD
CY2019Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	734000000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	576000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	425000000	USD
CY2020Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	240000000	USD
CY2019Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	105000000	USD
CY2020Q4	ed	Deferred Tax Liabilities And Accumulated Deferred Investment Tax Credit DeferredTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit	6475000000	USD
CY2019Q4	ed	Deferred Tax Liabilities And Accumulated Deferred Investment Tax Credit DeferredTaxLiabilitiesAndAccumulatedDeferredInvestmentTaxCredit	6227000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	764000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	809000000	USD
CY2020Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4513000000	USD
CY2019Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4827000000	USD
CY2020Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	234000000	USD
CY2019Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	279000000	USD
CY2020Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	16094000000	USD
CY2019Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	15052000000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	20382000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	18527000000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	18847000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	18022000000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	218000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	191000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	19065000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	18213000000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	62895000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	58079000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15425000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	1382000000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.86
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	889000000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	705000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	100000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10000000	USD
CY2020	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-16000000	USD
CY2018	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	106000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	16839000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	1440000000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.96
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	971000000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	825000000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	102000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3000000	USD
CY2019	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-19000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	18213000000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1144000000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	3.06
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	1023000000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	640000000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	113000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	19065000000	USD
CY2020Q4	ed	Common Stock Equity Shares CommonStockEquityShares	342000000	shares
CY2019Q4	ed	Common Stock Equity Shares CommonStockEquityShares	333000000	shares
CY2020Q4	ed	Common Stock Equity Before Accumulated Comprehensive Income Loss CommonStockEquityBeforeAccumulatedComprehensiveIncomeLoss	18872000000	USD
CY2019Q4	ed	Common Stock Equity Before Accumulated Comprehensive Income Loss CommonStockEquityBeforeAccumulatedComprehensiveIncomeLoss	18041000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	23000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	17000000	USD
CY2020Q4	ed	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax And Reclassification Adjustment AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTaxAndReclassificationAdjustment	-2000000	USD
CY2019Q4	ed	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax And Reclassification Adjustment AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTaxAndReclassificationAdjustment	-2000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-25000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-19000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	18847000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	18022000000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	218000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	191000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	19065000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	18213000000	USD
CY2020Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	971000000	USD
CY2019Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	974000000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	168000000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	141000000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	47000000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	37000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	22349000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	19973000000	USD
CY2020Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	1967000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1446000000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	20382000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	18527000000	USD
CY2020Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	39229000000	USD
CY2019Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	36549000000	USD
CY2020	ed	Numberof Registrants NumberofRegistrants	2	registrant
CY2020	ed	Numberof Regulated Subsidiaries NumberofRegulatedSubsidiaries	2	subsidiary
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	78000000	USD
CY2020	us-gaap	Excise Taxes Collected ExciseTaxesCollected	335000000	USD
CY2019	us-gaap	Excise Taxes Collected ExciseTaxesCollected	323000000	USD
CY2018	us-gaap	Excise Taxes Collected ExciseTaxesCollected	330000000	USD
CY2020Q4	us-gaap	Plant Held For Future Use Amount PlantHeldForFutureUseAmount	92000000	USD
CY2019Q4	us-gaap	Plant Held For Future Use Amount PlantHeldForFutureUseAmount	75000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	2474000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	1937000000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	42024000000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	39751000000	USD
CY2020Q4	ed	Public Utilities Depreciation Allowance Current Rate Plans PublicUtilitiesDepreciationAllowanceCurrentRatePlans	1694000000	USD
CY2020Q4	ed	Other Deferred Charges And Noncurrent Assets OtherDeferredChargesAndNoncurrentAssets	54000000	USD
CY2020Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	12000000	USD
CY2020	ed	Depreciation Expense Other Deferred Charges And Noncurrent Assets And Prepayments DepreciationExpenseOtherDeferredChargesAndNoncurrentAssetsAndPrepayments	7000000	USD
CY2020Q4	ed	Accumulated Depreciation Other Deferred Charges And Noncurrent Assets And Prepayments AccumulatedDepreciationOtherDeferredChargesAndNoncurrentAssetsAndPrepayments	10000000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	102000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	99000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	102000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	102000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	102000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	102000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	102000000	USD
CY2018	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	2000000	USD
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020Q4	ed	Supplemental Retirement Income Plan Assets SupplementalRetirementIncomePlanAssets	465000000	USD
CY2019Q4	ed	Supplemental Retirement Income Plan Assets SupplementalRetirementIncomePlanAssets	397000000	USD
CY2020Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	92000000	USD
CY2019Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	81000000	USD
CY2020Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	3000000	USD
CY2019Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	2000000	USD
CY2020Q4	us-gaap	Long Term Investments LongTermInvestments	1816000000	USD
CY2019Q4	us-gaap	Long Term Investments LongTermInvestments	2065000000	USD
CY2020	ed	Pension Investment Gains And Losses Recognized Time Period PensionInvestmentGainsAndLossesRecognizedTimePeriod	P15Y
CY2020	ed	Pension Actuarial Gains And Losses Recognized Time Period PensionActuarialGainsAndLossesRecognizedTimePeriod	P10Y
CY2020	ed	Difference Between Fair Value And Expected Market Related Value Of Plan Assets DifferenceBetweenFairValueAndExpectedMarketRelatedValueOfPlanAssets	0.20
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	24000000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	24000000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	24000000	USD
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div><span style="color:#424242;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassification </span></div><div><span style="color:#424242;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:115%">Certain prior year amounts have been reclassified within Note L to conform with current year presentation.</span></div>
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1101000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	1343000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1382000000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	334800000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	328500000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	311700000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	900000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1000000.0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1200000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	335700000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	329500000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	312900000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.29
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.09
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.43
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.28
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.08
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.42
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#424242;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Estimates</span></div><div><span style="color:#424242;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</span></div>
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1272000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	981000000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	164000000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	236000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1436000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1217000000	USD
CY2020Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	266000000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	6195000000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	4859000000	USD
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	128000000	USD
CY2020Q4	us-gaap	Regulatory Assets RegulatoryAssets	6461000000	USD
CY2019Q4	us-gaap	Regulatory Assets RegulatoryAssets	4987000000	USD
CY2020Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4513000000	USD
CY2019Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4827000000	USD
CY2020Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	36000000	USD
CY2019Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	102000000	USD
CY2020Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	4549000000	USD
CY2019Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	4929000000	USD
CY2020	ed	Return On Regulatory Assets ReturnOnRegulatoryAssets	1696000000	USD
CY2019	ed	Return On Regulatory Assets ReturnOnRegulatoryAssets	1188000000	USD
CY2020	ed	Other Customer Provided Capital Rate OtherCustomerProvidedCapitalRate	0.0265
CY2019	ed	Other Customer Provided Capital Rate OtherCustomerProvidedCapitalRate	0.042
CY2020Q4	ed	Regulatory Assets Not Earning Return RegulatoryAssetsNotEarningReturn	4766000000	USD
CY2019Q4	ed	Regulatory Assets Not Earning Return RegulatoryAssetsNotEarningReturn	3799000000	USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	342297534	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	332629597	shares
CY2020Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	23210700	shares
CY2019Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	23210700	shares
CY2020	ed	Percentage Limitation For Income Available For Dividends PercentageLimitationForIncomeAvailableForDividends	1
CY2020	ed	Rolling Average Calculation Of Income Available For Dividends RollingAverageCalculationOfIncomeAvailableForDividends	P2Y
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1967000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	966000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	385000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	437000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	315000000	USD
CY2020Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	215000000	USD
CY2019Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	178000000	USD
CY2020Q4	us-gaap	Commercial Paper CommercialPaper	1705000000	USD
CY2020	ed	Weighted Average Interest Rate Of Commercial Paper WeightedAverageInterestRateOfCommercialPaper	0.003
CY2019Q4	us-gaap	Commercial Paper CommercialPaper	1692000000	USD
CY2019	ed	Weighted Average Interest Rate Of Commercial Paper WeightedAverageInterestRateOfCommercialPaper	0.020
CY2019Q4	us-gaap	Loans Payable Current LoansPayableCurrent	0	USD
CY2020Q4	us-gaap	Loans Payable Current LoansPayableCurrent	0	USD
CY2020Q4	us-gaap	Ratio Of Indebtedness To Net Capital1 RatioOfIndebtednessToNetCapital1	0.53
CY2020Q4	ed	Percentage Of Liens Of Companies Consolidated Asset PercentageOfLiensOfCompaniesConsolidatedAsset	0.05
CY2020Q4	ed	Debt Instrument Covenant Compliance Maximum Aggregate Limit Of Failure To Pay Debt Or Derivative Obligations DebtInstrumentCovenantComplianceMaximumAggregateLimitOfFailureToPayDebtOrDerivativeObligations	150000000	USD
CY2020Q4	ed	Debt Instrument Covenant Compliance Maximum Aggregate Limit Of Failure To Pay Debt Or Derivative Obligations DebtInstrumentCovenantComplianceMaximumAggregateLimitOfFailureToPayDebtOrDerivativeObligations	150000000	USD
CY2020Q4	us-gaap	Defined Benefit Pension Plan Current And Noncurrent Liabilities DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities	759000000	USD
CY2019Q4	us-gaap	Defined Benefit Pension Plan Current And Noncurrent Liabilities DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities	185000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	465000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	397000000	USD
CY2020	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	33000000	USD
CY2019	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	19000000	USD
CY2020Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	2042000000	USD
CY2019Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	1831000000	USD
CY2020Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	2042000000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	141000000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	106000000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Third Year ContractualObligationDueInThirdYear	68000000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Fourth Year ContractualObligationDueInFourthYear	53000000	USD
CY2020Q4	us-gaap	Contractual Obligation Due In Fifth Year ContractualObligationDueInFifthYear	54000000	USD
CY2020Q4	us-gaap	Contractual Obligation Due After Fifth Year ContractualObligationDueAfterFifthYear	487000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	85000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	83000000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	79000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	75000000	USD
CY2020Q4	us-gaap	Direct Financing Lease Residual Value Of Leased Asset DirectFinancingLeaseResidualValueOfLeasedAsset	3000000	USD
CY2020Q4	ed	Direct Financing Lease Accumulated Amortization DirectFinancingLeaseAccumulatedAmortization	3000000	USD
CY2019Q4	us-gaap	Direct Financing Lease Residual Value Of Leased Asset DirectFinancingLeaseResidualValueOfLeasedAsset	1000000	USD
CY2019Q4	ed	Direct Financing Lease Accumulated Amortization DirectFinancingLeaseAccumulatedAmortization	5000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	23000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	23000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	23000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	39000000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P19Y1M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P19Y9M18D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M18D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P12Y2M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.043
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.043
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.018
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.035
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	79000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	1000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	77000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	1000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	74000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	75000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	75000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	938000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due In Rolling After Year Five FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive	1000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1318000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	3000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	458000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	0	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	860000000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	96000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	764000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	2000000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	860000000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3000000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-12000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-10000000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	50000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	96000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	107000000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3000000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	42000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	219000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	310000000	USD
CY2020	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-7000000	USD
CY2019	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-7000000	USD
CY2018	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-9000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	90000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	296000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	401000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7985000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7699000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Pension And Other Postretirement Costs DeferredTaxLiabilitiesPensionAndOtherPostretirementCosts	910000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Pension And Other Postretirement Costs DeferredTaxLiabilitiesPensionAndOtherPostretirementCosts	712000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Environmental Redemption Costs DeferredTaxLiabilitiesEnvironmentalRedemptionCosts	243000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Environmental Redemption Costs DeferredTaxLiabilitiesEnvironmentalRedemptionCosts	205000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Storm Costs DeferredTaxLiabilitiesStormCosts	31000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Storm Costs DeferredTaxLiabilitiesStormCosts	22000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Equity Method Investments DeferredTaxLiabilitiesEquityMethodInvestments	536000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Equity Method Investments DeferredTaxLiabilitiesEquityMethodInvestments	376000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Operating Lease Right Of Use Asset DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset	220000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Operating Lease Right Of Use Asset DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset	231000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Other Regulatory Assets DeferredTaxLiabilitiesOtherRegulatoryAssets	46000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Other Regulatory Assets DeferredTaxLiabilitiesOtherRegulatoryAssets	104000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9971000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9349000000	USD
CY2020Q4	ed	Deferred Tax Assets Pension And Other Postretirement Costs DeferredTaxAssetsPensionAndOtherPostretirementCosts	504000000	USD
CY2019Q4	ed	Deferred Tax Assets Pension And Other Postretirement Costs DeferredTaxAssetsPensionAndOtherPostretirementCosts	291000000	USD
CY2020Q4	ed	Deferred Tax Assets Regulatory Assets And Liabilities Future Income Tax DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesFutureIncomeTax	617000000	USD
CY2019Q4	ed	Deferred Tax Assets Regulatory Assets And Liabilities Future Income Tax DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesFutureIncomeTax	678000000	USD
CY2020Q4	ed	Deferred Tax Assets Regulatory Assets And Liabilities Other DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesOther	656000000	USD
CY2019Q4	ed	Deferred Tax Assets Regulatory Assets And Liabilities Other DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesOther	702000000	USD
CY2020Q4	ed	Deferred Tax Assets Superfund And Environmental Costs DeferredTaxAssetsSuperfundAndEnvironmentalCosts	241000000	USD
CY2019Q4	ed	Deferred Tax Assets Superfund And Environmental Costs DeferredTaxAssetsSuperfundAndEnvironmentalCosts	206000000	USD
CY2020Q4	ed	Deferred Tax Assets Asset Retirement Obligations DeferredTaxAssetsAssetRetirementObligations	178000000	USD
CY2019Q4	ed	Deferred Tax Assets Asset Retirement Obligations DeferredTaxAssetsAssetRetirementObligations	135000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Operating Lease Liabilities DeferredTaxLiabilitiesOperatingLeaseLiabilities	211000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Operating Lease Liabilities DeferredTaxLiabilitiesOperatingLeaseLiabilities	231000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	164000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	108000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1022000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	896000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	22000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	31000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	59000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	47000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3630000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3263000000	USD
CY2020Q4	ed	Deferred Tax Liabilities Excluding Investmentin Noncontrolled Affiliates Net DeferredTaxLiabilitiesExcludingInvestmentinNoncontrolledAffiliatesNet	6341000000	USD
CY2019Q4	ed	Deferred Tax Liabilities Excluding Investmentin Noncontrolled Affiliates Net DeferredTaxLiabilitiesExcludingInvestmentinNoncontrolledAffiliatesNet	6086000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	134000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	141000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6475000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6227000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.04
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.01
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.01
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0
CY2020	ed	Effective Income Tax Rate Reconciliation Cost Of Removal Percent EffectiveIncomeTaxRateReconciliationCostOfRemovalPercent	0.02
CY2019	ed	Effective Income Tax Rate Reconciliation Cost Of Removal Percent EffectiveIncomeTaxRateReconciliationCostOfRemovalPercent	0.01
CY2018	ed	Effective Income Tax Rate Reconciliation Cost Of Removal Percent EffectiveIncomeTaxRateReconciliationCostOfRemovalPercent	0.01
CY2020	ed	Effective Income Tax Rate Reconciliation Other Plant Related Items Percent EffectiveIncomeTaxRateReconciliationOtherPlantRelatedItemsPercent	-0.01
CY2019	ed	Effective Income Tax Rate Reconciliation Other Plant Related Items Percent EffectiveIncomeTaxRateReconciliationOtherPlantRelatedItemsPercent	-0.01
CY2018	ed	Effective Income Tax Rate Reconciliation Other Plant Related Items Percent EffectiveIncomeTaxRateReconciliationOtherPlantRelatedItemsPercent	-0.01
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0.02
CY2020	ed	Effective Income Tax Rate Reconciliation Deductible Expense Amortization Of Excess Deferred Income Taxes Percent EffectiveIncomeTaxRateReconciliationDeductibleExpenseAmortizationOfExcessDeferredIncomeTaxesPercent	0.14
CY2019	ed	Effective Income Tax Rate Reconciliation Deductible Expense Amortization Of Excess Deferred Income Taxes Percent EffectiveIncomeTaxRateReconciliationDeductibleExpenseAmortizationOfExcessDeferredIncomeTaxesPercent	0.04
CY2018	ed	Effective Income Tax Rate Reconciliation Deductible Expense Amortization Of Excess Deferred Income Taxes Percent EffectiveIncomeTaxRateReconciliationDeductibleExpenseAmortizationOfExcessDeferredIncomeTaxesPercent	0.03
CY2020	ed	Effective Income Tax Rate Reconciliation Tax Credit Renewable Energy Credits Percent EffectiveIncomeTaxRateReconciliationTaxCreditRenewableEnergyCreditsPercent	0.03
CY2019	ed	Effective Income Tax Rate Reconciliation Tax Credit Renewable Energy Credits Percent EffectiveIncomeTaxRateReconciliationTaxCreditRenewableEnergyCreditsPercent	0.02
CY2018	ed	Effective Income Tax Rate Reconciliation Tax Credit Renewable Energy Credits Percent EffectiveIncomeTaxRateReconciliationTaxCreditRenewableEnergyCreditsPercent	0.01
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.01
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.01
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.07
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.17
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.23
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	21000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	12000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	10000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	3000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	6000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14000000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	3000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14000000	USD
CY2020Q4	ed	Unrecognized Tax Benefitsthat Would Impact Effective Tax Rate Netof Taxes UnrecognizedTaxBenefitsthatWouldImpactEffectiveTaxRateNetofTaxes	13000000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12026000000	USD
CY2020	us-gaap	Revenues Revenues	12246000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12144000000	USD
CY2019	us-gaap	Revenues Revenues	12574000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11928000000	USD
CY2018	us-gaap	Revenues Revenues	12337000000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	29000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	17000000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	29000000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	20000000	USD
CY2017Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	58000000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	87000000	USD
CY2020	ed	Unbilled Contracts Receivable Revenue Recognized UnbilledContractsReceivableRevenueRecognized	88000000	USD
CY2020	ed	Contract With Customer Liability Additions ContractWithCustomerLiabilityAdditions	31000000	USD
CY2019	ed	Unbilled Contracts Receivable Revenue Recognized UnbilledContractsReceivableRevenueRecognized	86000000	USD
CY2019	ed	Contract With Customer Liability Additions ContractWithCustomerLiabilityAdditions	1000000	USD
CY2018	ed	Unbilled Contracts Receivable Revenue Recognized UnbilledContractsReceivableRevenueRecognized	144000000	USD
CY2018	ed	Contract With Customer Liability Additions ContractWithCustomerLiabilityAdditions	38000000	USD
CY2020	ed	Unbilled Contracts Receivable Decrease From Billings UnbilledContractsReceivableDecreaseFromBillings	106000000	USD
CY2020	ed	Contractwith Customer Liability Decrease From Billings ContractwithCustomerLiabilityDecreaseFromBillings	7000000	USD
CY2019	ed	Unbilled Contracts Receivable Decrease From Billings UnbilledContractsReceivableDecreaseFromBillings	86000000	USD
CY2019	ed	Contractwith Customer Liability Decrease From Billings ContractwithCustomerLiabilityDecreaseFromBillings	4000000	USD
CY2018	ed	Unbilled Contracts Receivable Decrease From Billings UnbilledContractsReceivableDecreaseFromBillings	173000000	USD
CY2018	ed	Contractwith Customer Liability Decrease From Billings ContractwithCustomerLiabilityDecreaseFromBillings	105000000	USD
CY2020Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	11000000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	41000000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	29000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	17000000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	29000000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	20000000	USD
CY2020Q4	ed	Contract With Customer Liability Revenue Recognized Previously Outstanding ContractWithCustomerLiabilityRevenueRecognizedPreviouslyOutstanding	7000000	USD
CY2019Q4	ed	Contract With Customer Liability Revenue Recognized Previously Outstanding ContractWithCustomerLiabilityRevenueRecognizedPreviouslyOutstanding	4000000	USD
CY2018Q4	ed	Contract With Customer Liability Revenue Recognized Previously Outstanding ContractWithCustomerLiabilityRevenueRecognizedPreviouslyOutstanding	50000000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	216000000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	181000000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	35000000	USD
CY2020	ed	Late Fee Incomeand Other Fees Not Collected LateFeeIncomeandOtherFeesNotCollected	64000000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	47000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14000000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	13000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4000000	USD
CY2020	ed	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employer Contribution ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployerContribution	1	USD
CY2020	ed	Share Based Compensation Arrangement By Share Based Payment Award Contribution Amount By Employee For Matching ShareBasedCompensationArrangementByShareBasedPaymentAwardContributionAmountByEmployeeForMatching	9	USD
CY2020	ed	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Contribution Per Year ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeContributionPerYear	25000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	0.20
CY2020	us-gaap	Revenues Revenues	12246000000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1920000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2654000000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-401000000	USD
CY2020	us-gaap	Interest And Debt Expense InterestAndDebtExpense	1019000000	USD
CY2020	ed	Operating Income Tax Expense Benefit OperatingIncomeTaxExpenseBenefit	193000000	USD
CY2020Q4	us-gaap	Assets Assets	62895000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4085000000	USD
CY2019	us-gaap	Revenues Revenues	12574000000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1684000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	2676000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	51000000	USD
CY2019	us-gaap	Interest And Debt Expense InterestAndDebtExpense	991000000	USD
CY2019	ed	Operating Income Tax Expense Benefit OperatingIncomeTaxExpenseBenefit	300000000	USD
CY2019Q4	us-gaap	Assets Assets	58079000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3676000000	USD
CY2018	us-gaap	Revenues Revenues	12337000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1438000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	2664000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-62000000	USD
CY2018	us-gaap	Interest And Debt Expense InterestAndDebtExpense	819000000	USD
CY2018	ed	Operating Income Tax Expense Benefit OperatingIncomeTaxExpenseBenefit	406000000	USD
CY2018Q4	us-gaap	Assets Assets	53920000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5249000000	USD
CY2020	ed	Income Tax Expense Benefit Applicable To Non Operating Income IncomeTaxExpenseBenefitApplicableToNonOperatingIncome	-103000000	USD
CY2019	ed	Income Tax Expense Benefit Applicable To Non Operating Income IncomeTaxExpenseBenefitApplicableToNonOperatingIncome	-4000000	USD
CY2018	ed	Income Tax Expense Benefit Applicable To Non Operating Income IncomeTaxExpenseBenefitApplicableToNonOperatingIncome	-5000000	USD
CY2020Q4	ed	Gross Amountsof Recognized Assets Liabilities GrossAmountsofRecognizedAssetsLiabilities	-366000000	USD
CY2020Q4	ed	Derivative Asset Liability Gross Amount Offset In Balance Sheet DerivativeAssetLiabilityGrossAmountOffsetInBalanceSheet	-3000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-363000000	USD
CY2019Q4	ed	Gross Amountsof Recognized Assets Liabilities GrossAmountsofRecognizedAssetsLiabilities	-183000000	USD
CY2019Q4	ed	Derivative Asset Liability Gross Amount Offset In Balance Sheet DerivativeAssetLiabilityGrossAmountOffsetInBalanceSheet	-17000000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-166000000	USD
CY2020Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	3000000	USD
CY2019Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	9000000	USD
CY2020	ed	Deferred Derivative Gains Losses DeferredDerivativeGainsLosses	-26000000	USD
CY2019	ed	Deferred Derivative Gains Losses DeferredDerivativeGainsLosses	1000000	USD
CY2020	ed	Deferred Gain Loss Liability DeferredGainLossLiability	-301000000	USD
CY2019	ed	Deferred Gain Loss Liability DeferredGainLossLiability	-300000000	USD
CY2020	ed	Net Deferred Gain Loss NetDeferredGainLoss	-327000000	USD
CY2019	ed	Net Deferred Gain Loss NetDeferredGainLoss	-299000000	USD
CY2020	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-63000000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-12000000	USD
CY2020Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	217000000	USD
CY2020	ed	Credit Exposure Independent System Operators CreditExposureIndependentSystemOperators	103000000	USD
CY2020Q4	ed	Maximum Potential Future Exposure On Credit Risk Derivatives With Investment Grade Counterparties MaximumPotentialFutureExposureOnCreditRiskDerivativesWithInvestmentGradeCounterparties	47000000	USD
CY2020	ed	Credit Exposure Nonrated Counter Parties CreditExposureNonratedCounterParties	40000000	USD
CY2020Q4	ed	Maximum Potential Future Exposure On Credit Risk Derivatives With Commodity Exchange Brokers MaximumPotentialFutureExposureOnCreditRiskDerivativesWithCommodityExchangeBrokers	27000000	USD
CY2020Q4	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	293000000	USD
CY2020Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	212000000	USD
CY2019Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-16000000	USD
CY2018Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-13000000	USD
CY2020	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	-10000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	-5000000	USD
CY2020	ed	Fair Value Net Derivative Asset Liability Measuredon Recurring Basis Unobservable Inputs Reconciliation Gain Loss Includedin Regulatory Assetsand Liabilities FairValueNetDerivativeAssetLiabilityMeasuredonRecurringBasisUnobservableInputsReconciliationGainLossIncludedinRegulatoryAssetsandLiabilities	-7000000	USD
CY2019	ed	Fair Value Net Derivative Asset Liability Measuredon Recurring Basis Unobservable Inputs Reconciliation Gain Loss Includedin Regulatory Assetsand Liabilities FairValueNetDerivativeAssetLiabilityMeasuredonRecurringBasisUnobservableInputsReconciliationGainLossIncludedinRegulatoryAssetsandLiabilities	18000000	USD
CY2020	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-15000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-8000000	USD
CY2020	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-1000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-24000000	USD
CY2020Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-19000000	USD
CY2019Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-16000000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	576000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	425000000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	191000000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	16000000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	56000000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-1000000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	14000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	38000000	USD
CY2020	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	-49000000	USD
CY2019	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	-44000000	USD
CY2018	us-gaap	Revenues Revenues	12337000000	USD
CY2017	us-gaap	Revenues Revenues	12033000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1382000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1525000000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	12655000000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	12331000000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1279000000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1612000000	USD
CY2018	ed	Business Acquisition Pro Forma Interest Expense BusinessAcquisitionProFormaInterestExpense	37000000	USD
CY2017	ed	Business Acquisition Pro Forma Interest Expense BusinessAcquisitionProFormaInterestExpense	38000000	USD
CY2018Q4	ed	Business Combination Gain Loss Recognized From Sale Of Interest In Projects Before Tax BusinessCombinationGainLossRecognizedFromSaleOfInterestInProjectsBeforeTax	131000000	USD
CY2017	ed	Business Combination Gain Loss Recognized From Sale Of Interest In Projects Before Tax BusinessCombinationGainLossRecognizedFromSaleOfInterestInProjectsBeforeTax	131000000	USD

Files In Submission

Name	View Source	Status
0001047862-21-000049-index-headers.html	Edgar Link	pending
0001047862-21-000049-index.html	Edgar Link	pending
0001047862-21-000049.txt	Edgar Link	pending
0001047862-21-000049-xbrl.zip	Edgar Link	pending
ed-20201231.htm	Edgar Link	pending
ed-20201231.xsd	Edgar Link	pending
ed-20201231_cal.xml	Edgar Link	unprocessable
ed-20201231_def.xml	Edgar Link	unprocessable
ed-20201231_g1.jpg	Edgar Link	pending
ed-20201231_htm.xml	Edgar Link	completed
ed-20201231_lab.xml	Edgar Link	unprocessable
ed-20201231_pre.xml	Edgar Link	unprocessable
exhibit101151-202010k.htm	Edgar Link	pending
exhibit10134-202010k.htm	Edgar Link	pending
exhibit10149-202010k.htm	Edgar Link	pending
exhibit10156-202010k.htm	Edgar Link	pending
exhibit1019-202010k.htm	Edgar Link	pending
exhibit231-202010k.htm	Edgar Link	pending
exhibit232-202010k.htm	Edgar Link	pending
exhibit3111-202010k.htm	Edgar Link	pending
exhibit3112-202010k.htm	Edgar Link	pending
exhibit3121-202010k.htm	Edgar Link	pending
exhibit3122-202010k.htm	Edgar Link	pending
exhibit3211-202010k.htm	Edgar Link	pending
exhibit3212-202010k.htm	Edgar Link	pending
exhibit322-202010k.htm	Edgar Link	pending
exhibit3221-202010k.htm	Edgar Link	pending
exhibit3222-202010k.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
image_01.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R121.htm	Edgar Link	pending
R122.htm	Edgar Link	pending
R123.htm	Edgar Link	pending
R124.htm	Edgar Link	pending
R125.htm	Edgar Link	pending
R126.htm	Edgar Link	pending
R127.htm	Edgar Link	pending
R128.htm	Edgar Link	pending
R129.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R130.htm	Edgar Link	pending
R131.htm	Edgar Link	pending
R132.htm	Edgar Link	pending
R133.htm	Edgar Link	pending
R134.htm	Edgar Link	pending
R135.htm	Edgar Link	pending
R136.htm	Edgar Link	pending
R137.htm	Edgar Link	pending
R138.htm	Edgar Link	pending
R139.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R140.htm	Edgar Link	pending
R141.htm	Edgar Link	pending
R142.htm	Edgar Link	pending
R143.htm	Edgar Link	pending
R144.htm	Edgar Link	pending
R145.htm	Edgar Link	pending
R146.htm	Edgar Link	pending
R147.htm	Edgar Link	pending
R148.htm	Edgar Link	pending
R149.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R150.htm	Edgar Link	pending
R151.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$ED
CONSOLIDATED EDISON INC Stock $ed

2020 Form 10-K Financial Statement

#000104786221000049 Filed on February 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ED CONSOLIDATED EDISON INC Stock $ed

2020 Form 10-K Financial Statement

#000104786221000049 Filed on February 18, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ED
CONSOLIDATED EDISON INC Stock $ed