$AGR
Avangrid, Inc. Stock $agr

$agr Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000163499720000017 Filed on March 02, 2020

Income Statement

Concept	2019 Q4	2019 Q1	2018 Q4
Revenue	$1.609B	$1.842B	$1.665B
YoY Change	-3.36%	-1.23%	8.61%
Cost Of Revenue	$408.0M	$563.0M	$456.0M
YoY Change	-10.53%	-2.26%	19.69%
Gross Profit	$1.199B	$1.279B	$1.208B
YoY Change	-0.75%	-0.78%	4.86%
Gross Profit Margin	74.52%	69.44%	72.55%
Selling, General & Admin	$1.000M	$800.0K
YoY Change
% of Gross Profit	0.08%	0.06%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$253.0M	$222.0M	$211.0M
YoY Change	19.91%	9.36%	-2.31%
% of Gross Profit	21.1%	17.36%	17.47%
Operating Expenses	$988.0M	$938.0M	$970.0M
YoY Change	1.86%	6.47%	7.54%
Operating Profit	$216.0M	$341.0M	$249.0M
YoY Change	-13.25%	-15.38%	-163.52%
Interest Expense	-$82.00M	$78.00M	-$82.00M
YoY Change	0.0%	5.41%	-27.43%
% of Operating Profit	-37.96%	22.87%	-32.93%
Other Income/Expense, Net	$120.0M	-$7.000M	-$9.000M
YoY Change	-1433.33%	-66.67%	-10.0%
Pretax Income	$249.0M	$257.0M	$147.0M
YoY Change	69.39%	-17.1%	-128.54%
Income Tax	$66.00M	$41.00M	$0.00
% Of Pretax Income	26.51%	15.95%	0.0%
Net Earnings	$223.0M	$217.0M	$119.0M
YoY Change	87.39%	-11.07%	-254.55%
Net Earnings / Revenue	13.86%	11.78%	7.15%
Basic Earnings Per Share		$0.70
Diluted Earnings Per Share	$613.9K	$0.70	$358.4K
COMMON SHARES
Basic Shares Outstanding	309.0M shares	309.5M shares	309.0M shares
Diluted Shares Outstanding		309.7M shares

Balance Sheet

Concept	2019 Q4	2019 Q1	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$178.0M	$33.00M	$36.00M
YoY Change	394.44%	-17.5%	-12.2%
Cash & Equivalents	$178.0M	$33.00M	$36.00M
Short-Term Investments
Other Short-Term Assets	$6.000M	$500.0M	$6.000M
YoY Change	0.0%	-21.88%	20.0%
Inventory	$251.0M	$194.0M	$235.0M
Prepaid Expenses	$34.00M		$43.00M
Receivables	$1.082B	$1.264B	$1.142B
Other Receivables	$10.00M	$7.000M	$6.000M
Total Short-Term Assets	$2.025B	$1.998B	$1.963B
YoY Change	3.16%	0.86%	-13.14%
LONG-TERM ASSETS
Property, Plant & Equipment	$25.20B	$23.31B	$23.46B
YoY Change	7.4%	2.44%	3.48%
Goodwill	$3.119B	$3.127B	$3.127B
YoY Change	-0.26%	0.0%	0.0%
Intangibles	$314.0M	$321.0M	$323.0M
YoY Change	-2.79%	-1.83%	-1.52%
Long-Term Investments	$645.0M	$481.0M	$366.0M
YoY Change	76.23%	38.22%	3.98%
Other Assets	$311.0M	$308.0M	$162.0M
YoY Change	91.98%	271.08%	128.17%
Total Long-Term Assets	$32.37B	$30.61B	$30.20B
YoY Change	7.17%	3.76%	2.7%
TOTAL ASSETS
Total Short-Term Assets	$2.025B	$1.998B	$1.963B
Total Long-Term Assets	$32.37B	$30.61B	$30.20B
Total Assets	$34.39B	$32.61B	$32.17B
YoY Change	6.92%	3.57%	1.57%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$64.00M	$35.00M	$58.00M
YoY Change	10.34%	-46.15%	-34.83%
Accrued Expenses	$84.00M	$80.00M	$143.0M
YoY Change	-41.26%	23.08%	-0.69%
Deferred Revenue	$10.00M	$5.000M	$9.000M
YoY Change	11.11%		12.5%
Short-Term Debt	$560.0M	$798.0M	$587.0M
YoY Change	-4.6%	20.54%	-25.32%
Long-Term Debt Due	$730.0M	$366.0M	$394.0M
YoY Change	85.28%	71.03%	115.3%
Total Short-Term Liabilities	$3.589B	$3.153B	$3.004B
YoY Change	19.47%	16.09%	-3.53%
LONG-TERM LIABILITIES
Long-Term Debt	$6.716B	$5.307B	$5.368B
YoY Change	25.11%	2.85%	3.31%
Other Long-Term Liabilities	$5.269B	$560.0M	$499.0M
YoY Change	955.91%	53.42%	38.61%
Total Long-Term Liabilities	$15.27B	$14.00B	$13.76B
YoY Change	10.94%	4.1%	2.22%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.589B	$3.153B	$3.004B
Total Long-Term Liabilities	$15.27B	$14.00B	$13.76B
Total Liabilities	$18.86B	$17.15B	$16.76B
YoY Change	12.47%	6.11%	1.14%
SHAREHOLDERS EQUITY
Retained Earnings	$1.634B	$1.527B	$1.528B
YoY Change	6.94%	3.67%	3.59%
Common Stock	$13.66B	$13.66B	$13.66B
YoY Change	0.02%	0.03%	0.03%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares	485.8K shares	485.8K shares	485.8K shares
Shareholders Equity	$15.19B	$15.16B	$15.10B
YoY Change
Total Liabilities & Shareholders Equity	$34.39B	$32.61B	$32.17B
YoY Change	6.92%	3.57%	1.57%

Cashflow Statement

Concept	2019 Q4	2019 Q1	2018 Q4
OPERATING ACTIVITIES
Net Income	$223.0M	$217.0M	$119.0M
YoY Change	87.39%	-11.07%	-254.55%
Depreciation, Depletion And Amortization	$253.0M	$222.0M	$211.0M
YoY Change	19.91%	9.36%	-2.31%
Cash From Operating Activities	$349.0M	$315.0M	$464.0M
YoY Change	-24.78%	-47.24%	5.22%
INVESTING ACTIVITIES
Capital Expenditures	-$695.0M	$425.0M	-$604.0M
YoY Change	15.07%	6.52%	-15.17%
Acquisitions
YoY Change
Other Investing Activities	$138.0M	$116.0M	$83.00M
YoY Change	66.27%		118.42%
Cash From Investing Activities	-$557.0M	-$526.0M	-$521.0M
YoY Change	6.91%	62.85%	-22.7%
FINANCING ACTIVITIES
Cash Dividend Paid		$135.0M
YoY Change		0.75%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net		$43.00M
YoY Change		2050.0%
Cash From Financing Activities	284.0M	$206.0M	60.00M
YoY Change	373.33%	-174.91%	-75.51%
NET CHANGE
Cash From Operating Activities	349.0M	$315.0M	464.0M
Cash From Investing Activities	-557.0M	-$526.0M	-521.0M
Cash From Financing Activities	284.0M	$206.0M	60.00M
Net Change In Cash	76.00M	-$5.000M	3.000M
YoY Change	2433.33%	400.0%	-75.0%
FREE CASH FLOW
Cash From Operating Activities	$349.0M	$315.0M	$464.0M
Capital Expenditures	-$695.0M	$425.0M	-$604.0M
Free Cash Flow	$1.044B	-$110.0M	$1.068B
YoY Change	-2.25%	-155.56%	-7.37%

Facts In Submission

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CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001634997
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CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
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CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	309752140	shares
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CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
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CY2019	dei	Entity File Number EntityFileNumber	001-37660
CY2019	dei	Entity Registrant Name EntityRegistrantName	Avangrid, Inc.
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CT
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	06477
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CY2019	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2019	dei	Trading Symbol TradingSymbol	AGR
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
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CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-25000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	40000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	665000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	573000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	422000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-24000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	689000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	570000000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1142000000	USD
CY2019Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	10000000	USD
CY2018Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	6000000	USD
CY2019Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	11000000	USD
CY2018Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	16000000	USD
CY2019Q4	us-gaap	Deferred Fuel Cost DeferredFuelCost	110000000	USD
CY2018Q4	us-gaap	Deferred Fuel Cost DeferredFuelCost	109000000	USD
CY2019Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	141000000	USD
CY2018Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	126000000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	199000000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	229000000	USD
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	294000000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	299000000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	2025000000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	1963000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25218000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23459000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	70000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	645000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	366000000	USD
CY2019Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	63000000	USD
CY2018Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	58000000	USD
CY2019Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2567000000	USD
CY2018Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2640000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	6000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	3119000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	3127000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	314000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	323000000	USD
CY2019Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	84000000	USD
CY2018Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	63000000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	311000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	162000000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	3828000000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	3675000000	USD
CY2019Q4	us-gaap	Assets Assets	34416000000	USD
CY2018Q4	us-gaap	Assets Assets	32167000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	730000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	394000000	USD
CY2019Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	560000000	USD
CY2018Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	587000000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	72000000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	62000000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1361000000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	1132000000	USD
CY2019Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	64000000	USD
CY2018Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	58000000	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	136000000	USD
CY2018Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	136000000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	56000000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	59000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	12000000	USD
CY2019Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	20000000	USD
CY2019Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	5246000000	USD
CY2018Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	5169000000	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	44000000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	334000000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	327000000	USD
CY2019Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	242000000	USD
CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	205000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3587000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3004000000	USD
CY2019Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3281000000	USD
CY2018Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3223000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1814000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1530000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	1274000000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	1385000000	USD
CY2019Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	1100000000	USD
CY2018Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	1102000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	65000000	USD
CY2019Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	85000000	USD
CY2018Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	97000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	190000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	217000000	USD
CY2019Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	338000000	USD
CY2018Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	339000000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	380000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	499000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6716000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5368000000	USD
CY2019Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	15243000000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	13760000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	18830000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	16764000000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	3000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	3000000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	13660000000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	13657000000	USD
CY2019Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	12000000	USD
CY2018Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	12000000	USD
CY2017	us-gaap	Accretion Expense AccretionExpense	10000000	USD
CY2018	us-gaap	Accretion Expense AccretionExpense	12000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1681000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1528000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-95000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-72000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	15237000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	15104000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	349000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	299000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15586000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15403000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	34416000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	32167000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	676000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	598000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	382000000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	934000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	855000000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	824000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	16000000	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	642000000	USD
CY2019	us-gaap	Accretion Expense AccretionExpense	12000000	USD
CY2019	agr	Amortization Of Regulatory Assets Liabilities AmortizationOfRegulatoryAssetsLiabilities	64000000	USD
CY2018	agr	Amortization Of Regulatory Assets Liabilities AmortizationOfRegulatoryAssetsLiabilities	73000000	USD
CY2017	agr	Amortization Of Regulatory Assets Liabilities AmortizationOfRegulatoryAssetsLiabilities	62000000	USD
CY2019	us-gaap	Pension Expense PensionExpense	91000000	USD
CY2018	us-gaap	Pension Expense PensionExpense	123000000	USD
CY2017	us-gaap	Pension Expense PensionExpense	112000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	10000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-40000000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	12000000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	14000000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	16000000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	76000000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-22000000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-17000000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	135000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	10000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2000000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	138000000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	151000000	USD
CY2017	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-251000000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	51000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	27000000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	73000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-126000000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	117000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	89000000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	152000000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	87000000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-218000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-5000000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	98000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	116000000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-38000000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	80000000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-261000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1593000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1791000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1763000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2740000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1787000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2416000000	USD
CY2019	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	74000000	USD
CY2018	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	60000000	USD
CY2017	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	57000000	USD
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	108000000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	186000000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	18000000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	18000000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	12000000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	2000000	USD
CY2018	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2017	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	0	USD
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	5000000	USD
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	4000000	USD
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	4000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	176000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	45000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2713000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1564000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2341000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2137000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	597000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	888000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	346000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	217000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	305000000	USD
CY2019	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	28000000	USD
CY2018	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	201000000	USD
CY2017	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	625000000	USD
CY2019	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	27000000	USD
CY2018	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	13000000	USD
CY2017	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	33000000	USD
CY2019	agr	Repayments Of Tax Equity Financing Arrangements RepaymentsOfTaxEquityFinancingArrangements	0	USD
CY2018	agr	Repayments Of Tax Equity Financing Arrangements RepaymentsOfTaxEquityFinancingArrangements	0	USD
CY2017	agr	Repayments Of Tax Equity Financing Arrangements RepaymentsOfTaxEquityFinancingArrangements	113000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3000000	USD
CY2019	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	2000000	USD
CY2017	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	1000000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	63000000	USD
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	76000000	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	133000000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	223000000	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	5000000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	545000000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	537000000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	535000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1261000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-230000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	528000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	141000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-50000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-25000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	573000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	96000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	184000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	266000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	224000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	202000000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-13000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15208000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	382000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	40000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	422000000	USD
CY2017	us-gaap	Dividends Dividends	535000000	USD
CY2017	agr	Common Stock Held In Trust During Period Value CommonStockHeldInTrustDuringPeriodValue	0	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1000000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	3000000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1000000	USD
CY2017	agr	Transaction With Noncontrolling Interests TransactionWithNoncontrollingInterests	4000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15096000000	USD
CY2018Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	136000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	598000000	USD
CY2018	us-gaap	Dividends Dividends	540000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	2000000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3000000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	76000000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	217000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15403000000	USD
CY2019Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	-1000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	676000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	665000000	USD
CY2019	us-gaap	Dividends Dividends	545000000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3000000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	63000000	USD
CY2019	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	124000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	15586000000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	Background and Nature of Operations<div style="line-height:120%;padding-top:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Avangrid, Inc., formerly Iberdrola USA, Inc. (AVANGRID, we or the Company), is an energy services holding company engaged in the regulated energy transmission and distribution business through its principal subsidiary Avangrid Networks, Inc. (Networks), and in the renewable energy generation business through its principal subsidiary, Avangrid Renewables Holding, Inc. (ARHI). ARHI in turn holds subsidiaries including Avangrid Renewables, LLC (Renewables). Iberdrola, S.A. (Iberdrola), a corporation organized under the laws of the Kingdom of Spain, owns </span><span style="font-family:inherit;font-size:10pt;"><span>81.5%</span></span><span style="font-family:inherit;font-size:10pt;"> of the outstanding common stock of AVANGRID. The remaining outstanding shares are publicly traded on the New York Stock Exchange and owned by various shareholders. AVANGRID was organized in </span><span style="font-family:inherit;font-size:10pt;">1997</span><span style="font-family:inherit;font-size:10pt;"> as NGE Resources, Inc. under the laws of New York as the holding company for its principal operating utility companies.</span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In December 2017, management committed to a plan to sell the gas storage and trading businesses because they represented non-core businesses that were not aligned with our strategic objectives. On </span><span style="font-family:inherit;font-size:10pt;">March 1, 2018</span><span style="font-family:inherit;font-size:10pt;">, the Company closed a transaction to sell Enstor Energy Services, LLC, which operated AVANGRID’s gas trading business, to CCI U.S. Asset Holdings LLC, a subsidiary of Castleton Commodities International, LLC (CCI). On </span><span style="font-family:inherit;font-size:10pt;">May 1, 2018</span><span style="font-family:inherit;font-size:10pt;">, the Company closed a transaction to sell Enstor Gas, LLC (Gas), which operated AVANGRID’s gas storage business, to Amphora Gas Storage USA, LLC.</span></div>
CY2019	us-gaap	Basis Of Accounting BasisOfAccounting	Basis of PresentationThe accompanying consolidated financial statements have been prepared in accordance with U.S. GAAP and are presented on a consolidated basis, and therefore include the accounts of AVANGRID and its consolidated subsidiaries, Networks and ARHI. All intercompany transactions and accounts have been eliminated in all periods presented.
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.029
CY2018	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.028
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5368000000	USD
CY2019	agr	Defined Benefit Plan Amortization Of Prior Service Cost Period DefinedBenefitPlanAmortizationOfPriorServiceCostPeriod	P10Y
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23459000000	USD
CY2019Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23312000000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	82000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	162000000	USD
CY2019Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	308000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	394000000	USD
CY2019Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	366000000	USD
CY2019Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	8000000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	327000000	USD
CY2019Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	355000000	USD
CY2019Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	74000000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	499000000	USD
CY2019Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	560000000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	21000000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	13000000	USD
CY2019Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5307000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1528000000	USD
CY2019Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1527000000	USD
CY2019Q1	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	-12000000	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates and Assumptions</span></div>The preparation of our consolidated financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting periods. Significant estimates and assumptions are used for, but not limited to: (1) allowance for doubtful accounts and unbilled revenues; (2) asset impairments, including goodwill; (3) investments in equity instruments; (4) depreciable lives of assets; (5) income tax valuation allowances; (6) uncertain tax positions; (7) reserves for professional, workers’ compensation and comprehensive general insurance liability risks; (8) contingency and litigation reserves; (9) fair value measurements; (10) earnings sharing mechanisms; (11) environmental remediation liabilities; (12) AROs; (13) pension and other postretirement employee benefits and (14) noncontrolling interest balances. Future events and their effects cannot be predicted with certainty; accordingly, our accounting estimates require the exercise of judgment. The accounting estimates used in the preparation of our consolidated financial statements will change as new events occur, as more experience is acquired, as additional information is obtained and as our operating environment changes. We evaluate and update our assumptions and estimates on an ongoing basis and may employ outside specialists to assist in our evaluations, as necessary. Actual results could differ from those estimates
CY2019	agr	Contract Asset Amortization Term ContractAssetAmortizationTerm	P10Y
CY2019Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	12000000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	9000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	10000000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	9000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5965000000	USD
CY2019	us-gaap	Lease Income LeaseIncome	6000000	USD
CY2019	agr	Derivative Revenue DerivativeRevenue	244000000	USD
CY2019	agr	Alternative Revenue Programs AlternativeRevenuePrograms	75000000	USD
CY2019	us-gaap	Results Of Operations Revenue Other ResultsOfOperationsRevenueOther	48000000	USD
CY2019	us-gaap	Revenues Revenues	6338000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5824000000	USD
CY2018	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	384000000	USD
CY2018	agr	Derivative Revenue DerivativeRevenue	134000000	USD
CY2018	agr	Alternative Revenue Programs AlternativeRevenuePrograms	80000000	USD
CY2018	us-gaap	Results Of Operations Revenue Other ResultsOfOperationsRevenueOther	56000000	USD
CY2018	us-gaap	Revenues Revenues	6478000000	USD
CY2019Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	1050000000	USD
CY2018Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	1118000000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	345000000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	374000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	58000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	44000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	28000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	17000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	13000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	33000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	194000000	USD
CY2019	agr	Networks Supply Companies NetworksSupplyCompanies	8000000	company
CY2019	agr	Percentage Of Standard Service Customers With Wholesale Power Supply Agreements In Place For Next Fiscal Year PercentageOfStandardServiceCustomersWithWholesalePowerSupplyAgreementsInPlaceForNextFiscalYear	0.70
CY2019	agr	Percentage Of Standard Service Customers With Wholesale Power Supply Agreements In Place For Second Fiscal Year PercentageOfStandardServiceCustomersWithWholesalePowerSupplyAgreementsInPlaceForSecondFiscalYear	0.40
CY2017Q1	agr	Percentage Of Proposed Return On Equity Year One PercentageOfProposedReturnOnEquityYearOne	0.0910
CY2017Q1	agr	Equity Ratio EquityRatio	0.50
CY2017Q1	agr	Proposed Return On Equity Year One Percentage Share ProposedReturnOnEquityYearOnePercentageShare	0.50
CY2019Q1	agr	Equity Ratio Year Three EquityRatioYearThree	0.55
CY2019Q4	agr	Percentage Of Proposed Return On Equity Year One PercentageOfProposedReturnOnEquityYearOne	0.0970
CY2019Q4	agr	Equity Ratio EquityRatio	0.54
CY2017Q1	agr	Number Of Reforming Energy Vision Related Orders Issued NumberOfReformingEnergyVisionRelatedOrdersIssued	3	order
CY2017Q1	agr	Number Of Energy Storage Projects NumberOfEnergyStorageProjects	2	project
CY2017Q2	us-gaap	Deferred Costs DeferredCosts	2300000	USD
CY2017Q2	us-gaap	Deferred Costs DeferredCosts	2300000	USD
CY2019	agr	Number Of Trailing Average Period Used To Calculate Set Rate NumberOfTrailingAveragePeriodUsedToCalculateSetRate	P13M
CY2019	agr	Number Of Trailing Average Period Used To Calculate Set Rate NumberOfTrailingAveragePeriodUsedToCalculateSetRate	P13M
CY2019Q4	us-gaap	Amount Of Restricted Net Assets For Consolidated And Unconsolidated Subsidiaries AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries	5090000000	USD
CY2019Q4	agr	Number Of Peaking Generation Plants NumberOfPeakingGenerationPlants	2	plant
CY2019Q4	agr	Number Of Peaking Generation Plants NumberOfPeakingGenerationPlants	2	plant
CY2019Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	1749000000	USD
CY2019Q4	us-gaap	Regulatory Assets RegulatoryAssets	2861000000	USD
CY2018Q4	us-gaap	Regulatory Assets RegulatoryAssets	2945000000	USD
CY2019Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	294000000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	299000000	USD
CY2019Q4	agr	Regulatory Assets Noncurrent Including Deferred Income Taxes Regulatory RegulatoryAssetsNoncurrentIncludingDeferredIncomeTaxesRegulatory	2567000000	USD
CY2018Q4	agr	Regulatory Assets Noncurrent Including Deferred Income Taxes Regulatory RegulatoryAssetsNoncurrentIncludingDeferredIncomeTaxesRegulatory	2646000000	USD
CY2019	agr	Unfunded Future Income Tax Expense Collection Period UnfundedFutureIncomeTaxExpenseCollectionPeriod	P50Y
CY2019Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	3523000000	USD
CY2018Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	3428000000	USD
CY2019Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	242000000	USD
CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	205000000	USD
CY2019Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3281000000	USD
CY2018Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	3223000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	3119000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	3127000000	USD
CY2019	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	8000000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	619000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	305000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	314000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	613000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	290000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	323000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25218000000	USD
CY2018Q4	agr	Property Plant And Equipment In Service Gross PropertyPlantAndEquipmentInServiceGross	30208000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8359000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	14000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	13000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	12000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	12000000	USD
CY2019Q4	agr	Property Plant And Equipment In Service Gross PropertyPlantAndEquipmentInServiceGross	32110000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	9059000000	USD
CY2019Q4	agr	Property Plant And Equipment In Service Net PropertyPlantAndEquipmentInServiceNet	23051000000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	2167000000	USD
CY2018Q4	agr	Property Plant And Equipment In Service Net PropertyPlantAndEquipmentInServiceNet	21849000000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	1610000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23459000000	USD
CY2018Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Accumulated Amortization CapitalLeasesNetInvestmentInDirectFinancingLeasesAccumulatedAmortization	76000000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	55000000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	26000000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	28000000	USD
CY2019Q4	agr	Accrued Liabilities For Property Plant And Equipment Additions AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions	357000000	USD
CY2018Q4	agr	Accrued Liabilities For Property Plant And Equipment Additions AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions	154000000	USD
CY2017Q4	agr	Accrued Liabilities For Property Plant And Equipment Additions AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions	209000000	USD
CY2019	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	11000000	USD
CY2018	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	0	USD
CY2017	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	5000000	USD
CY2019	us-gaap	Depreciation Depreciation	919000000	USD
CY2018	us-gaap	Depreciation Depreciation	840000000	USD
CY2017	us-gaap	Depreciation Depreciation	802000000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	12000000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-40000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	190000000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	196000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5000000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	12000000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	5000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	217000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	5000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	6000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	2000000	USD
CY2018Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	89000000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	38000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	35000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	7446000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	5762000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	730000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	394000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6716000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	5368000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	730000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	801000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	363000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	439000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	612000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2945000000	USD
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	8168000000	USD
CY2018Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	5952000000	USD
CY2019Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	560000000	USD
CY2018Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	587000000	USD
CY2019Q4	us-gaap	Commercial Paper CommercialPaper	562000000	USD
CY2018Q4	us-gaap	Commercial Paper CommercialPaper	589000000	USD
CY2019Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	6000000	USD
CY2018Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	7000000	USD
CY2019Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	125000000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	95000000	USD
CY2019Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	125000000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	105000000	USD
CY2018Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	114000000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	79000000	USD
CY2018Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	99000000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	141000000	USD
CY2018Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-15000000	USD
CY2017Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	6000000	USD
CY2016Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	31000000	USD
CY2019	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings	53000000	USD
CY2018	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings	18000000	USD
CY2017	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings	18000000	USD
CY2019	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings	2000000	USD
CY2018	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings	9000000	USD
CY2017	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings	1000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	51000000	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	9000000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings	17000000	USD
CY2019	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss	2000000	USD
CY2018	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss	0	USD
CY2017	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss	2000000	USD
CY2019	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss	3000000	USD
CY2018	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss	5000000	USD
CY2017	agr	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss	1000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	-1000000	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	-5000000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	1000000	USD
CY2019	agr	Changes In Fair Value Derivatives Recognized In Regulatory Assets And Liabilities Net ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet	5000000	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	6000000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	5000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-4000000	USD
CY2018	agr	Changes In Fair Value Derivatives Recognized In Regulatory Assets And Liabilities Net ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet	-5000000	USD
CY2017	agr	Changes In Fair Value Derivatives Recognized In Regulatory Assets And Liabilities Net ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet	-17000000	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	10000000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	17000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Purchases FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases	22000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-3000000	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	4000000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	4000000	USD
CY2019Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	25000000	USD
CY2018Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-15000000	USD
CY2017Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	6000000	USD
CY2019	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	51000000	USD
CY2018	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	9000000	USD
CY2017	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	17000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	306000000	USD
CY2019	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	1509000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	303000000	USD
CY2018	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	1653000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	280000000	USD
CY2017	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	1338000000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	43000000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-38000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	306000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	303000000	USD
CY2019Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	21000000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	26000000	USD
CY2019Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	28000000	USD
CY2019	agr	Lease Renewal Term LeaseRenewalTerm	P40Y
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	12000000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	3000000	USD
CY2019	agr	Finance Lease Cost FinanceLeaseCost	15000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	18000000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	2000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	40000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	70000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	12000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	65000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	77000000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	133000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	9000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	54000000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	63000000	USD
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P7Y7M2D
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0535
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P12Y11M23D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0362
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	13000000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	3000000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	27000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	10000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	14000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	7000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	13000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	3000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	10000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	50000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	7000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	6000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	2000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	51000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	72000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	101000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	9000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	24000000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	63000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	77000000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	59000000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	72000000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	71000000	USD
CY2018Q4	us-gaap	Capital Leases Contingent Rental Payments Due CapitalLeasesContingentRentalPaymentsDue	11000000	USD
CY2017Q4	us-gaap	Capital Leases Contingent Rental Payments Due CapitalLeasesContingentRentalPaymentsDue	19000000	USD
CY2016Q4	us-gaap	Capital Leases Contingent Rental Payments Due CapitalLeasesContingentRentalPaymentsDue	22000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	31000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	30000000	USD
CY2018Q4	agr	Leases Liability Payments Due Next Twelve Months LeasesLiabilityPaymentsDueNextTwelveMonths	61000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	39000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	10000000	USD
CY2018Q4	agr	Leases Liability Payments Due In Two Years LeasesLiabilityPaymentsDueInTwoYears	49000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	38000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	7000000	USD
CY2018Q4	agr	Leases Liability Payments Due In Three Years LeasesLiabilityPaymentsDueInThreeYears	45000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	35000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	2000000	USD
CY2018Q4	agr	Leases Liability Payments Due In Four Years LeasesLiabilityPaymentsDueInFourYears	37000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	50000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	33000000	USD
CY2018Q4	agr	Leases Liability Payments Due In Five Years LeasesLiabilityPaymentsDueInFiveYears	83000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	735000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	2000000	USD
CY2018Q4	agr	Leases Liability Payments Due After Year Five LeasesLiabilityPaymentsDueAfterYearFive	737000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	911000000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	101000000	USD
CY2018Q4	agr	Leases Liability Payments Due LeasesLiabilityPaymentsDue	1012000000	USD
CY2011Q3	agr	Refund Period Term RefundPeriodTerm	P15M
CY2019Q4	us-gaap	Loss Contingency New Claims Filed Number LossContingencyNewClaimsFiledNumber	2	complaint
CY2018Q4	us-gaap	Public Utilities Approved Return On Equity Percentage PublicUtilitiesApprovedReturnOnEquityPercentage	0.0988
CY2016Q2	agr	Price Of Power Purchase Agreements PriceOfPowerPurchaseAgreements	259000000	USD
CY2018Q2	agr	Requested Renewables Delay From Preliminary Proposed Ruling Period RequestedRenewablesDelayFromPreliminaryProposedRulingPeriod	P2Y
CY2019Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	1396000000	USD
CY2019	agr	Sales Future Commitment Arrangement Due In Next Twelve Months SalesFutureCommitmentArrangementDueInNextTwelveMonths	192000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	177000000	USD
CY2019	agr	Sales Future Commitment Arrangement Due In Second Year SalesFutureCommitmentArrangementDueInSecondYear	138000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	87000000	USD
CY2019	agr	Sales Future Commitment Arrangement Due In Third Year SalesFutureCommitmentArrangementDueInThirdYear	72000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Fourth Year PurchaseObligationDueInFourthYear	68000000	USD
CY2019	agr	Sales Future Commitment Arrangement Due In Fourth Year SalesFutureCommitmentArrangementDueInFourthYear	52000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Fifth Year PurchaseObligationDueInFifthYear	44000000	USD
CY2019	agr	Sales Future Commitment Arrangement Due In Fifth Year SalesFutureCommitmentArrangementDueInFifthYear	39000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due After Fifth Year PurchaseObligationDueAfterFifthYear	830000000	USD
CY2019	agr	Sales Future Commitment Arrangement Due There After SalesFutureCommitmentArrangementDueThereAfter	87000000	USD
CY2019Q4	us-gaap	Purchase Obligation PurchaseObligation	2602000000	USD
CY2019	agr	Sales Future Commitment Arrangement SalesFutureCommitmentArrangement	580000000	USD
CY2019Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	474000000	USD
CY2019	agr	Number Of Inactive Hazardous Waste Disposal Sites NumberOfInactiveHazardousWasteDisposalSites	25	site
CY2019	agr	Number Of Inactive Hazardous Waste Disposal Sites NumberOfInactiveHazardousWasteDisposalSites	25	site
CY2019	agr	Number Of Inactive Hazardous Waste Disposal Sites NumberOfInactiveHazardousWasteDisposalSites	25	site
CY2019	agr	Number Of Inactive Hazardous Waste Disposal Sites With Liability Recorded NumberOfInactiveHazardousWasteDisposalSitesWithLiabilityRecorded	10	site
CY2019	agr	Number Of Inactive Hazardous Waste Disposal Sites NumberOfInactiveHazardousWasteDisposalSites	25	site
CY2019	agr	Number Of Inactive Hazardous Waste Disposal Sites Not Expected To Incur Additional Liabilities NumberOfInactiveHazardousWasteDisposalSitesNotExpectedToIncurAdditionalLiabilities	15	site
CY2019	agr	Number Of Additional Inactive Hazardous Waste Disposal Sites With Liability Recorded NumberOfAdditionalInactiveHazardousWasteDisposalSitesWithLiabilityRecorded	11	site
CY2019	agr	Number Of Sites Where Gas Was Manufactured In The Past NumberOfSitesWhereGasWasManufacturedInThePast	53	site
CY2019	agr	Number Of Manufacturing Sites Consent Orders To Investigate And Remediate NumberOfManufacturingSitesConsentOrdersToInvestigateAndRemediate	41	site
CY2019	agr	Number Of Sites Where Gas Was Manufactured In The Past NumberOfSitesWhereGasWasManufacturedInThePast	53	site
CY2019	agr	Number Of Sites Where Gas Was Manufactured In The Past NumberOfSitesWhereGasWasManufacturedInThePast	53	site
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	349000000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	366000000	USD
CY2019	agr	Number Of Sites Court Modified Decision NumberOfSitesCourtModifiedDecision	9	site
CY2014Q3	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	27000000	USD
CY2014Q3	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	22000000	USD
CY2014Q4	us-gaap	Site Contingency Recovery From Third Party Of Environmental Remediation Cost SiteContingencyRecoveryFromThirdPartyOfEnvironmentalRemediationCost	5000000	USD
CY2019	agr	Number Of Sites Court Modified Decision NumberOfSitesCourtModifiedDecision	9	site
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	21000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-20000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-6000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12000000	USD
CY2019	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	5000000	USD
CY2018	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	19000000	USD
CY2017	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	-8000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	152000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	233000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-124000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	44000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-12000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-73000000	USD
CY2019	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	196000000	USD
CY2018	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	221000000	USD
CY2017	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	-197000000	USD
CY2019	agr	Production Tax Credits ProductionTaxCredits	57000000	USD
CY2018	agr	Production Tax Credits ProductionTaxCredits	68000000	USD
CY2017	agr	Production Tax Credits ProductionTaxCredits	53000000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1000000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	2000000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	1000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	143000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	170000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-259000000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	172000000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	161000000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	43000000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation And Amortization IncomeTaxReconciliationNondeductibleExpenseDepreciationAndAmortization	-23000000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation And Amortization IncomeTaxReconciliationNondeductibleExpenseDepreciationAndAmortization	-5000000	USD
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CY2019	us-gaap	Interest Expense InterestExpense	306000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	143000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2740000000	USD
CY2019	agr	Adjusted Net Income AdjustedNetIncome	673000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25218000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	645000000	USD
CY2019Q4	us-gaap	Assets Assets	34416000000	USD
CY2018	us-gaap	Revenues Revenues	6478000000	USD
CY2018	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	-16000000	USD
CY2018	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	855000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1127000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	10000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	303000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	170000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1787000000	USD
CY2018	agr	Adjusted Net Income AdjustedNetIncome	684000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23459000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	366000000	USD
CY2018Q4	us-gaap	Assets Assets	32167000000	USD
CY2017	us-gaap	Revenues Revenues	5963000000	USD
CY2017	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	-642000000	USD
CY2017	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	824000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	505000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-40000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	280000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-259000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2416000000	USD
CY2017	agr	Adjusted Net Income AdjustedNetIncome	682000000	USD
CY2019	agr	Adjusted Net Income AdjustedNetIncome	673000000	USD
CY2018	agr	Adjusted Net Income AdjustedNetIncome	684000000	USD
CY2017	agr	Adjusted Net Income AdjustedNetIncome	682000000	USD
CY2019	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2018	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2017	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	49000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	6000000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	4000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	20000000	USD
CY2019	agr	Change In Fair Value Of Derivative Instruments Due To Mark To Market Adjustment Renewables ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables	-76000000	USD
CY2018	agr	Change In Fair Value Of Derivative Instruments Due To Mark To Market Adjustment Renewables ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables	25000000	USD
CY2017	agr	Change In Fair Value Of Derivative Instruments Due To Mark To Market Adjustment Renewables ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables	15000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2000000	USD
CY2019	agr	Disposal Group Not Discontinued Operation Gain Loss On Disposal After Tax DisposalGroupNotDiscontinuedOperationGainLossOnDisposalAfterTax	0	USD
CY2018	agr	Disposal Group Not Discontinued Operation Gain Loss On Disposal After Tax DisposalGroupNotDiscontinuedOperationGainLossOnDisposalAfterTax	-16000000	USD
CY2017	agr	Disposal Group Not Discontinued Operation Gain Loss On Disposal After Tax DisposalGroupNotDiscontinuedOperationGainLossOnDisposalAfterTax	-642000000	USD
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CY2017	us-gaap	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Income Tax Expense Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit	-328000000	USD
CY2019	us-gaap	Restructuring Reserve Accelerated Depreciation RestructuringReserveAcceleratedDepreciation	33000000	USD
CY2018	us-gaap	Restructuring Reserve Accelerated Depreciation RestructuringReserveAcceleratedDepreciation	3000000	USD
CY2017	us-gaap	Restructuring Reserve Accelerated Depreciation RestructuringReserveAcceleratedDepreciation	0	USD
CY2019	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	10000000	USD
CY2018	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	6000000	USD
CY2017	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-162000000	USD
CY2019	agr	Gas Storage Net Of Tax GasStorageNetOfTax	0	USD
CY2018	agr	Gas Storage Net Of Tax GasStorageNetOfTax	11000000	USD
CY2017	agr	Gas Storage Net Of Tax GasStorageNetOfTax	-64000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	700000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	595000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	381000000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2500000	shares
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1000000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1268722000000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	32.80
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	6284000000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	38.78
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	726000000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	31.80
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1274280000000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	32.83
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	3000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	150000000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	38.78
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	4000000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	139000000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	216000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	217000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	110000000	USD
CY2018	us-gaap	Severance Costs1 SeveranceCosts1	3000000	USD
CY2017	us-gaap	Severance Costs1 SeveranceCosts1	15000000	USD
CY2017	us-gaap	Loss On Contract Termination LossOnContractTermination	4000000	USD
CY2019Q1	us-gaap	Revenues Revenues	1842000000	USD
CY2019Q2	us-gaap	Revenues Revenues	1400000000	USD
CY2019Q3	us-gaap	Revenues Revenues	1487000000	USD
CY2019Q4	us-gaap	Revenues Revenues	1609000000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	341000000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	207000000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	239000000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	216000000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	216000000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	105000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	223000000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.70
CY2019Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.36
CY2019Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.48
CY2019Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.72
CY2018Q1	us-gaap	Revenues Revenues	1865000000	USD
CY2018Q2	us-gaap	Revenues Revenues	1402000000	USD
CY2018Q3	us-gaap	Revenues Revenues	1546000000	USD
CY2018Q4	us-gaap	Revenues Revenues	1665000000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	403000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	222000000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	253000000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	249000000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	116000000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	238000000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	110000000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	134000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	244000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	107000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	125000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	119000000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.79
CY2018Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.40
CY2018Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.38
CY2019Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	309500000	shares
CY2018Q2	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateProvisionalIncomeTaxExpenseBenefit	7000000	USD
CY2018Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateProvisionalIncomeTaxExpenseBenefit	39000000	USD

Files In Submission

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$AGR
Avangrid, Inc. Stock $agr

2019 Q4 Form 10-K Financial Statement

#000163499720000017 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AGR Avangrid, Inc. Stock $agr

2019 Q4 Form 10-K Financial Statement

#000163499720000017 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AGR
Avangrid, Inc. Stock $agr