$NOC
NORTHROP GRUMMAN CORP /DE/ Stock $noc

$noc Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000113342121000006 Filed on January 28, 2021

Income Statement

Concept	2020 Q4	2020	2019 Q4
Revenue	$10.21B	$36.80B	$8.721B
YoY Change	17.1%	8.74%	6.93%
Cost Of Revenue	$8.122B	$29.32B	$6.615B
YoY Change	22.78%	10.3%	2.26%
Gross Profit	$2.090B	$7.478B	$2.106B
YoY Change	-0.76%	3.02%	24.84%
Gross Profit Margin	20.47%	20.32%	24.15%
Selling, General & Admin	$938.0M	$2.313B	$970.0M
YoY Change	-3.3%	-1.03%	30.38%
% of Gross Profit	44.88%	30.93%	46.06%
Research & Development		$1.100B
YoY Change		15.42%
% of Gross Profit		14.71%
Depreciation & Amortization	$345.0M	$1.267B	$281.0M
YoY Change	22.78%	0.16%	5.64%
% of Gross Profit	16.51%	16.94%	13.34%
Operating Expenses	$938.0M	$32.73B	$970.0M
YoY Change	-3.3%	9.58%	30.38%
Operating Profit	$1.152B	$4.065B	$1.136B
YoY Change	1.41%	2.42%	20.47%
Interest Expense	-$160.0M	-$593.0M	-$130.0M
YoY Change	23.08%	12.31%	-8.45%
% of Operating Profit	-13.89%	-14.59%	-11.44%
Other Income/Expense, Net	-$687.0M	$92.00M	-$1.575B
YoY Change	-56.38%	-14.02%	295.73%
Pretax Income	$305.0M	$3.728B	-$569.0M
YoY Change	-153.6%	46.31%	-241.19%
Income Tax	-$25.00M	$539.0M	-$160.0M
% Of Pretax Income	-8.2%	14.46%
Net Earnings	$330.0M	$3.189B	-$409.0M
YoY Change	-180.68%	41.86%	-214.89%
Net Earnings / Revenue	3.23%	8.67%	-4.69%
Basic Earnings Per Share	$1.98	$19.08	-$2.43
Diluted Earnings Per Share	$1.97	$19.03	-$2.43
COMMON SHARES
Basic Shares Outstanding	166.8M shares	167.1M shares	168.4M shares
Diluted Shares Outstanding	167.4M shares	167.6M shares	168.4M shares

Balance Sheet

Concept	2020 Q4	2020	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$5.303B	$4.907B	$2.627B
YoY Change	101.87%	118.57%	37.25%
Cash & Equivalents	$4.907B	$4.907B	$2.245B
Short-Term Investments	$396.0M		$382.0M
Other Short-Term Assets	$1.402B	$3.037B	$997.0M
YoY Change	40.62%	204.61%	2.47%
Inventory	$759.0M	$759.0M	$783.0M
Prepaid Expenses
Receivables	$1.501B	$6.641B	$1.326B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$15.34B	$15.34B	$10.69B
YoY Change	43.6%	43.6%	10.38%
LONG-TERM ASSETS
Property, Plant & Equipment	$7.071B	$8.604B	$6.912B
YoY Change	2.3%	2.15%	8.47%
Goodwill	$17.52B		$18.71B
YoY Change	-6.36%		0.19%
Intangibles	$783.0M		$1.040B
YoY Change	-24.71%		-24.2%
Long-Term Investments
YoY Change
Other Assets	$1.909B	$2.220B	$1.725B
YoY Change	10.67%	-0.58%	17.91%
Total Long-Term Assets	$29.13B	$29.13B	$30.40B
YoY Change	-4.21%	-4.21%	8.69%
TOTAL ASSETS
Total Short-Term Assets	$15.34B	$15.34B	$10.69B
Total Long-Term Assets	$29.13B	$29.13B	$30.40B
Total Assets	$44.47B	$44.47B	$41.09B
YoY Change	8.23%	8.23%	9.13%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.806B	$1.806B	$2.226B
YoY Change	-18.87%	-18.87%	2.02%
Accrued Expenses	$2.234B	$2.497B	$2.274B
YoY Change	-1.76%	9.81%	23.92%
Deferred Revenue	$2.517B		$2.237B
YoY Change	12.52%		16.69%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$742.0M	$742.0M	$1.109B
YoY Change	-33.09%	-33.09%	114.51%
Total Short-Term Liabilities	$9.580B	$9.580B	$9.434B
YoY Change	1.55%	1.55%	14.02%
LONG-TERM LIABILITIES
Long-Term Debt	$14.26B	$14.26B	$12.77B
YoY Change	11.68%	11.68%	-8.02%
Other Long-Term Liabilities	$2.208B	$10.05B	$1.779B
YoY Change	24.11%	-0.17%	23.03%
Total Long-Term Liabilities	$16.47B	$24.31B	$14.55B
YoY Change	13.2%	6.45%	906.15%
TOTAL LIABILITIES
Total Short-Term Liabilities	$9.580B	$9.580B	$9.434B
Total Long-Term Liabilities	$16.47B	$24.31B	$14.55B
Total Liabilities	$33.89B	$33.89B	$32.27B
YoY Change	5.02%	5.02%	9.52%
SHAREHOLDERS EQUITY
Retained Earnings	$10.48B		$8.748B
YoY Change	19.82%		8.43%
Common Stock	$225.0M		$168.0M
YoY Change	33.93%		-1.75%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$10.58B	$10.58B	$8.819B
YoY Change
Total Liabilities & Shareholders Equity	$44.47B	$44.47B	$41.09B
YoY Change	8.23%	8.23%	9.13%

Cashflow Statement

Concept	2020 Q4	2020	2019 Q4
OPERATING ACTIVITIES
Net Income	$330.0M	$3.189B	-$409.0M
YoY Change	-180.68%	41.86%	-214.89%
Depreciation, Depletion And Amortization	$345.0M	$1.267B	$281.0M
YoY Change	22.78%	0.16%	5.64%
Cash From Operating Activities	$1.602B	$4.305B	$2.464B
YoY Change	-34.98%	0.19%	3.66%
INVESTING ACTIVITIES
Capital Expenditures	-$592.0M	$1.420B	-$471.0M
YoY Change	25.69%	12.34%	1.73%
Acquisitions		$0.00
YoY Change
Other Investing Activities	$209.0M	-$4.000M	$49.00M
YoY Change	326.53%	-92.98%	880.0%
Cash From Investing Activities	-$383.0M	-$1.211B	-$422.0M
YoY Change	-9.24%	0.33%	-7.86%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$490.0M
YoY Change		-34.14%
Debt Paid & Issued, Net		$1.027B
YoY Change		105.4%
Cash From Financing Activities	-1.307B	-$432.0M	-924.0M
YoY Change	41.45%	-82.18%	-41.07%
NET CHANGE
Cash From Operating Activities	1.602B	$4.305B	2.464B
Cash From Investing Activities	-383.0M	-$1.211B	-422.0M
Cash From Financing Activities	-1.307B	-$432.0M	-924.0M
Net Change In Cash	-88.00M	$2.662B	1.118B
YoY Change	-107.87%	299.7%	218.52%
FREE CASH FLOW
Cash From Operating Activities	$1.602B	$4.305B	$2.464B
Capital Expenditures	-$592.0M	$1.420B	-$471.0M
Free Cash Flow	$2.194B	$2.885B	$2.935B
YoY Change	-25.25%	-4.88%	3.35%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Registrant Name EntityRegistrantName	NORTHROP GRUMMAN CORP /DE/
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001133421
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	51200000000	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	166718384	shares
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001133421
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-16411
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	80-0640649
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	2980 Fairview Park Drive
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Falls Church,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	VA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	22042
CY2020	dei	City Area Code CityAreaCode	703
CY2020	dei	Local Phone Number LocalPhoneNumber	280-2900
CY2020	dei	Security12b Title Security12bTitle	Common Stock
CY2020	dei	Trading Symbol TradingSymbol	NOC
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	51200000000	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	166718384	shares
CY2020	us-gaap	Revenues Revenues	36799000000	USD
CY2019	us-gaap	Revenues Revenues	33841000000	USD
CY2018	us-gaap	Revenues Revenues	30095000000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3413000000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3290000000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	3011000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	4065000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	3969000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	3780000000	USD
CY2020	us-gaap	Interest And Debt Expense InterestAndDebtExpense	593000000	USD
CY2019	us-gaap	Interest And Debt Expense InterestAndDebtExpense	528000000	USD
CY2018	us-gaap	Interest And Debt Expense InterestAndDebtExpense	562000000	USD
CY2020	noc	Net Fa Snonservice Pension Benefit Expense NetFASnonservicePensionBenefitExpense	1198000000	USD
CY2019	noc	Net Fa Snonservice Pension Benefit Expense NetFASnonservicePensionBenefitExpense	800000000	USD
CY2018	noc	Net Fa Snonservice Pension Benefit Expense NetFASnonservicePensionBenefitExpense	1049000000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-1034000000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-1800000000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss Immediate Recognition As Component In Net Periodic Benefit Cost Credit DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit	-655000000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	92000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	107000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	130000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3728000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2548000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3742000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	539000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	513000000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	19.08
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.28
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	18.59
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	167100000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	169300000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173700000	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	19.03
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.22
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	18.49
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	167600000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	170000000.0	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	174600000	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	3189000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	2248000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3229000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	14000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	15000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	19000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	41000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	47000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	60000000	USD
CY2020	noc	Other Comprehensive Income Loss Foreign Currency Translationand Translation Adjustmentand Other Netof Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationandTranslationAdjustmentandOtherNetofTax	10000000	USD
CY2019	noc	Other Comprehensive Income Loss Foreign Currency Translationand Translation Adjustmentand Other Netof Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationandTranslationAdjustmentandOtherNetofTax	2000000	USD
CY2018	noc	Other Comprehensive Income Loss Foreign Currency Translationand Translation Adjustmentand Other Netof Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationandTranslationAdjustmentandOtherNetofTax	-14000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-31000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-45000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-74000000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3158000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2203000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3155000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4907000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2245000000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1501000000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1326000000	USD
CY2020Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	5140000000	USD
CY2019Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	5334000000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	759000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	783000000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1402000000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	997000000	USD
CY2020Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	1635000000	USD
CY2019Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	15344000000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	10685000000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	6335000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5850000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	7071000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6912000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1533000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1511000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	17518000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	18708000000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	783000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1040000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	311000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	508000000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1909000000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1725000000	USD
CY2020Q4	us-gaap	Assets Assets	44469000000	USD
CY2019Q4	us-gaap	Assets Assets	41089000000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1806000000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2226000000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1997000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1865000000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2517000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2237000000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3002000000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3106000000	USD
CY2020Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	258000000	USD
CY2019Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation Current LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	9580000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	9434000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	742000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1109000000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	14261000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	12770000000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	6498000000	USD
CY2019Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	6979000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1343000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1308000000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2208000000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1779000000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	33890000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	32270000000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	58000000	USD
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	166717179	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	166717179	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	167848424	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	167848424	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	167000000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	168000000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	0	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	10482000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	8748000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-128000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-97000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	10579000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	8819000000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	44469000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	41089000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	3189000000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1267000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1265000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	800000000	USD
CY2020	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	1034000000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	1800000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	655000000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	90000000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	127000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	86000000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	210000000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-509000000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	234000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	285000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-122000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-202000000	USD
CY2020	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-160000000	USD
CY2019	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	335000000	USD
CY2018	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	297000000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-18000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	135000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	37000000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	147000000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	78000000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	56000000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	719000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	617000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	381000000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-238000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-63000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-258000000	USD
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1678000000	USD
CY2019	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-703000000	USD
CY2018	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1083000000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	34000000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	59000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	29000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4305000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4297000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3827000000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-7657000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1420000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1264000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1249000000	USD
CY2020	noc	Cash Flow From Sale Of Equipment To A Customer CashFlowFromSaleOfEquipmentToACustomer	205000000	USD
CY2019	noc	Cash Flow From Sale Of Equipment To A Customer CashFlowFromSaleOfEquipmentToACustomer	0	USD
CY2018	noc	Cash Flow From Sale Of Equipment To A Customer CashFlowFromSaleOfEquipmentToACustomer	0	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-57000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-28000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1211000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1207000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8878000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1027000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	500000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2276000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2239000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-78000000	USD
CY2019	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-31000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-320000000	USD
CY2020	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	0	USD
CY2019	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	-198000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	198000000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	490000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	744000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1263000000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	953000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	880000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	821000000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	66000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	65000000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	85000000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-57000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-28000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-432000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2424000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4595000000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2662000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	666000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-9646000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2245000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1579000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11225000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4907000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2245000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1579000000	USD
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	11000000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	0	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	0	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	10579000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	8819000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	8187000000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.67
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.16
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	4.70
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Consideration DisposalGroupIncludingDiscontinuedOperationConsideration	3400000000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Accounting Estimates</span></div><div style="margin-bottom:5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The company’s consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP” or “FAS”). The preparation thereof requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of </span></div>contingencies at the date of the financial statements, as well as the reported amounts of sales and expenses during the reporting period. Estimates have been prepared using the most current and best available information; however, actual results could differ materially from those estimates.
CY2020	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	504000000	USD
CY2019	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	538000000	USD
CY2018	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	631000000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	81000000000.0	USD
CY2020	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Explanation RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionExplanation	We expect to recognize approximately 40 percent and 60 percent of our December 31, 2020 backlog as revenue over the next 12 and 24 months, respectively, with the remainder to be recognized thereafter.
CY2020Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	5140000000	USD
CY2019Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	5334000000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-194000000	USD
CY2020	noc	Percentincreasedecreasein Contract Asset PercentincreasedecreaseinContractAsset	-0.04
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2517000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2237000000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	280000000	USD
CY2020	noc	Percentdecreaseincreasein Contractwith Customer Liability Current PercentdecreaseincreaseinContractwithCustomerLiabilityCurrent	0.13
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	2623000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	3097000000	USD
CY2020	noc	Amountofincreasedecreaseinnetcontractassetsliabilities Amountofincreasedecreaseinnetcontractassetsliabilities	-474000000	USD
CY2020	noc	Percentincreasedecreaseinnetcontractassetsliabilities Percentincreasedecreaseinnetcontractassetsliabilities	-0.15
CY2020	noc	Percentincreasedecreaseinnetcontractassetsliabilities Percentincreasedecreaseinnetcontractassetsliabilities	-0.15
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1600000000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1300000000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1300000000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	1100000000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	953000000	USD
	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	764000000	USD
CY2020	noc	Researchand Developmentasa Percentof Sales ResearchandDevelopmentasaPercentofSales	0.029
CY2019	noc	Researchand Developmentasa Percentof Sales ResearchandDevelopmentasaPercentofSales	0.028
	noc	Researchand Developmentasa Percentof Sales ResearchandDevelopmentasaPercentofSales	0.025
CY2020Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	419000000	USD
CY2019Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	380000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	13406000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	12762000000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	6335000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5850000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-10000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	7071000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6912000000	USD
CY2020	noc	Revenue From Sale Of Equipment To A Customer RevenueFromSaleOfEquipmentToACustomer	444000000	USD
CY2020	noc	Cash Flow From Sale Of Equipment To A Customer CashFlowFromSaleOfEquipmentToACustomer	205000000	USD
CY2020	noc	Non Cash Proceeds From Sale Of Property Plant And Equipment NonCashProceedsFromSaleOfPropertyPlantAndEquipment	239000000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	72000000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	166000000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	185000000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2020Q4	noc	Prior Service Cost Tax Expense PriorServiceCostTaxExpense	3000000	USD
CY2019Q4	noc	Prior Service Cost Tax Expense PriorServiceCostTaxExpense	17000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-51000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-138000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-148000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-128000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-97000000	USD
CY2018Q2	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	7700000000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	29000000	USD
CY2018Q2	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	7700000000	USD
CY2018Q2	us-gaap	Shares Outstanding SharesOutstanding	57562152	shares
CY2018Q2	us-gaap	Business Acquisition Share Price BusinessAcquisitionSharePrice	134.50
CY2018Q2	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	7742000000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	32319000000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	3417000000	USD
CY2019	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	19.57
CY2019	noc	Pro Forma Adjustments Orbital At Kintercompanysaleselimination ProFormaAdjustmentsOrbitalATKintercompanysaleselimination	80000000	USD
CY2019	noc	Pro Forma Adjustments Eliminationofnonrecurringtransactioncosts ProFormaAdjustmentsEliminationofnonrecurringtransactioncosts	71000000	USD
CY2019	noc	Pro Forma Adjustments Additionaldepreciationexpensenetofremovalofhistoricaldepreciation ProFormaAdjustmentsAdditionaldepreciationexpensenetofremovalofhistoricaldepreciation	8000000	USD
CY2019	noc	Pro Forma Adjustments Additionalamortizationexpensenetofremovalofhistoricalamortizationexpense ProFormaAdjustmentsAdditionalamortizationexpensenetofremovalofhistoricalamortizationexpense	90000000	USD
CY2019	noc	Pro Forma Adjustments Eliminationof Orbital At Kshistoricalamortizationofnetactuariallossesandpriorservicecreditsandrevisedpensionandotherpostretirementcosts ProFormaAdjustmentsEliminationofOrbitalATKshistoricalamortizationofnetactuariallossesandpriorservicecreditsandrevisedpensionandotherpostretirementcosts	51000000	USD
CY2019	noc	Income Tax Effectsof Pro Forma Adjustments IncomeTaxEffectsofProFormaAdjustments	-5000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Consideration DisposalGroupIncludingDiscontinuedOperationConsideration	3400000000	USD
CY2020	us-gaap	Income Loss From Individually Significant Component Disposed Of Or Held For Sale Excluding Discontinued Operations Attributable To Parent Before Income Tax IncomeLossFromIndividuallySignificantComponentDisposedOfOrHeldForSaleExcludingDiscontinuedOperationsAttributableToParentBeforeIncomeTax	247000000	USD
CY2019	us-gaap	Income Loss From Individually Significant Component Disposed Of Or Held For Sale Excluding Discontinued Operations Attributable To Parent Before Income Tax IncomeLossFromIndividuallySignificantComponentDisposedOfOrHeldForSaleExcludingDiscontinuedOperationsAttributableToParentBeforeIncomeTax	245000000	USD
CY2018	us-gaap	Income Loss From Individually Significant Component Disposed Of Or Held For Sale Excluding Discontinued Operations Attributable To Parent Before Income Tax IncomeLossFromIndividuallySignificantComponentDisposedOfOrHeldForSaleExcludingDiscontinuedOperationsAttributableToParentBeforeIncomeTax	288000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Accounts Notes And Loans Receivable Net DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet	110000000	USD
CY2020Q4	noc	Disposal Group Including Discontinued Operation Unbilled Receivables Net DisposalGroupIncludingDiscontinuedOperationUnbilledReceivablesNet	269000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Other Current Assets DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets	9000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Property Plant And Equipment Noncurrent DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNoncurrent	14000000	USD
CY2020Q4	noc	Disposal Group Including Discontinued Operation Operating Lease Rou Assets DisposalGroupIncludingDiscontinuedOperationOperatingLeaseROUAssets	38000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Goodwill1 DisposalGroupIncludingDiscontinuedOperationGoodwill1	1195000000	USD
CY2020Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	1635000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Accounts Payable Current DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent	99000000	USD
CY2020Q4	noc	Disposal Group Including Discontinued Operation Employee Related Liabilities Current DisposalGroupIncludingDiscontinuedOperationEmployeeRelatedLiabilitiesCurrent	59000000	USD
CY2020Q4	noc	Disposal Group Including Discontinued Operation Contract With Customer Liability Current DisposalGroupIncludingDiscontinuedOperationContractWithCustomerLiabilityCurrent	31000000	USD
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Other Current Liabilities DisposalGroupIncludingDiscontinuedOperationOtherCurrentLiabilities	42000000	USD
CY2020Q4	noc	Disposal Group Including Discontinued Operation Operating Lease Liability Noncurrent DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilityNoncurrent	27000000	USD
CY2020Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	258000000	USD
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	500000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	700000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	900000	shares
CY2020	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	1400000	shares
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	3200000	shares
CY2018	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	3800000	shares
CY2020Q2	noc	Increase Decreasein Stock Dividend Percentage IncreaseDecreaseinStockDividendPercentage	0.10
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.45
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CY2019Q4	noc	Unbilled Contract Receivablenetofprogressandperformancebasedpayments UnbilledContractReceivablenetofprogressandperformancebasedpayments	5379000000	USD
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CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	451000000	USD
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	476000000	USD
CY2020Q4	us-gaap	Inventory For Long Term Contracts Or Programs General And Administrative Costs Included In Inventory InventoryForLongTermContractsOrProgramsGeneralAndAdministrativeCostsIncludedInInventory	41000000	USD
CY2019Q4	us-gaap	Inventory For Long Term Contracts Or Programs General And Administrative Costs Included In Inventory InventoryForLongTermContractsOrProgramsGeneralAndAdministrativeCostsIncludedInInventory	31000000	USD
CY2020Q4	us-gaap	Inventory Finished Goods And Work In Process Net Of Reserves InventoryFinishedGoodsAndWorkInProcessNetOfReserves	492000000	USD
CY2019Q4	us-gaap	Inventory Finished Goods And Work In Process Net Of Reserves InventoryFinishedGoodsAndWorkInProcessNetOfReserves	507000000	USD
CY2020Q4	us-gaap	Progress Payments Netted Against Inventory For Long Term Contracts Or Programs ProgressPaymentsNettedAgainstInventoryForLongTermContractsOrPrograms	62000000	USD
CY2019Q4	us-gaap	Progress Payments Netted Against Inventory For Long Term Contracts Or Programs ProgressPaymentsNettedAgainstInventoryForLongTermContractsOrPrograms	41000000	USD
CY2020Q4	noc	Inventoried Costs Net Of Progress Payments InventoriedCostsNetOfProgressPayments	430000000	USD
CY2019Q4	noc	Inventoried Costs Net Of Progress Payments InventoriedCostsNetOfProgressPayments	466000000	USD
CY2020Q4	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	329000000	USD
CY2019Q4	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	317000000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	759000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	783000000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	246000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	758000000	USD
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CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-474000000	USD
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CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	534000000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	505000000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3000000	USD
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CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	2000000	USD
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CY2020	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	5000000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	16000000	USD
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	8000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	539000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	513000000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	783000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	535000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	786000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	206000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.055
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.085
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.050
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CY2020	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	10000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.002
CY2019	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	14000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.005
CY2018	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	27000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.007
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CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	-84000000	USD
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CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	27000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.007
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	23000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.009
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	40000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.010
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	539000000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.145
CY2020Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	792000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.118
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	513000000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.137
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.145
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.118
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CY2019	noc	Significantmattersaffectingeffectivetaxratecomparabilitypercent Significantmattersaffectingeffectivetaxratecomparabilitypercent	0.037
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.118
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.137
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CY2019	noc	Effective Income Tax Rate Reconciliation Increasein Research Tax Credits EffectiveIncomeTaxRateReconciliationIncreaseinResearchTaxCredits	30000000	USD
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CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	324000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	270000000	USD
CY2019Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	551000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1223000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	748000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	283000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	187000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	158000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	293000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	270000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	400000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	207000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	190000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	65000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	23000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	7000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	15000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	7000000	USD
CY2020	noc	Unrecognized Tax Benefits Other UnrecognizedTaxBenefitsOther	2000000	USD
CY2019	noc	Unrecognized Tax Benefits Other UnrecognizedTaxBenefitsOther	3000000	USD
CY2018	noc	Unrecognized Tax Benefits Other UnrecognizedTaxBenefitsOther	5000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	258000000	USD
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CY2018	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	465000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1481000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1223000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	748000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	144000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	607000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	1738000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	1827000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	360000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	336000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	232000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	166000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	849000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	684000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	40000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	38000000	USD
CY2020Q4	noc	Deferred Tax Asset Lease Liabilities DeferredTaxAssetLeaseLiabilities	435000000	USD
CY2019Q4	noc	Deferred Tax Asset Lease Liabilities DeferredTaxAssetLeaseLiabilities	411000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	343000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	166000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	112000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	73000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4109000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3701000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	307000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	160000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3802000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3541000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	533000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	515000000	USD
CY2020Q4	noc	Deferred Tax Liabilities Purchase Intangibles DeferredTaxLiabilitiesPurchaseIntangibles	201000000	USD
CY2019Q4	noc	Deferred Tax Liabilities Purchase Intangibles DeferredTaxLiabilitiesPurchaseIntangibles	262000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	737000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	584000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	423000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	404000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	1513000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	1225000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	84000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	43000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3491000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3033000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	311000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	508000000	USD
CY2020Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	419000000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	364000000	USD
CY2020Q4	us-gaap	Tax Credit Carryforward Valuation Allowance TaxCreditCarryforwardValuationAllowance	221000000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	31000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	18672000000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	37000000	USD
CY2019	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	-1000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	18708000000	USD
CY2020	us-gaap	Goodwill Transfers GoodwillTransfers	-1195000000	USD
CY2020	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	5000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	17518000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3362000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3356000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2579000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2316000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	783000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1040000000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	262000000	USD
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CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	197000000	USD
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CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	44000000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	396000000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	382000000	USD
CY2020Q4	us-gaap	Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	133000000	USD
CY2019Q4	us-gaap	Foreign Currency Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue	98000000	USD
CY2020Q4	us-gaap	Foreign Currency Cash Flow Hedge Derivative At Fair Value Net ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet	0	USD
CY2019Q4	us-gaap	Foreign Currency Cash Flow Hedge Derivative At Fair Value Net ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet	7000000	USD
CY2020	us-gaap	Line Of Credit Facility Covenant Terms LineOfCreditFacilityCovenantTerms	The company also cannot permit the ratio of its debt to capitalization (as set forth in the credit agreements) to exceed 65 percent.
CY2020	us-gaap	Line Of Credit Facility Covenant Compliance LineOfCreditFacilityCovenantCompliance	the company was in compliance with all covenants under its credit agreements.
CY2020Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	235000000	USD
CY2019Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	272000000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	75000000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	64000000	USD
CY2020Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	15003000000	USD
CY2019Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	13879000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	742000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1109000000	USD
CY2020Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	14261000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	12770000000	USD
CY2020Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	18200000000	USD
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	15100000000	USD
CY2020	noc	Interest Paid Net Of Interest Received InterestPaidNetOfInterestReceived	572000000	USD
CY2019	noc	Interest Paid Net Of Interest Received InterestPaidNetOfInterestReceived	521000000	USD
CY2018	noc	Interest Paid Net Of Interest Received InterestPaidNetOfInterestReceived	456000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	742000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1505000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1053000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	3000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1503000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	10285000000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	15091000000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	13000000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	75000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	15003000000	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	614000000	USD
CY2020Q4	us-gaap	Loss Contingency Range Of Possible Loss Portion Not Accrued LossContingencyRangeOfPossibleLossPortionNotAccrued	346000000	USD
CY2020Q4	us-gaap	Recorded Third Party Environmental Recoveries Amount RecordedThirdPartyEnvironmentalRecoveriesAmount	529000000	USD
CY2020Q4	noc	Standby Unused Letters Of Creditandbankguarantees StandbyUnusedLettersOfCreditandbankguarantees	456000000	USD
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	531000000	USD
CY2019Q4	us-gaap	Loss Contingency Range Of Possible Loss Portion Not Accrued LossContingencyRangeOfPossibleLossPortionNotAccrued	448000000	USD
CY2019Q4	us-gaap	Recorded Third Party Environmental Recoveries Amount RecordedThirdPartyEnvironmentalRecoveriesAmount	436000000	USD
CY2020Q4	noc	Surety Bond Outstanding SuretyBondOutstanding	94000000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	590000000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	481000000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	403000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-79000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	19000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	60000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-62000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	15000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	47000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-55000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	14000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	41000000	USD
CY2020Q4	noc	Actual Percent Return On Plan Assets ActualPercentReturnOnPlanAssets	0.162
CY2019Q4	noc	Actual Percent Return On Plan Assets ActualPercentReturnOnPlanAssets	0.191
CY2020Q4	noc	Yearly Discount Rate Change In Basis Points YearlyDiscountRateChangeInBasisPoints	-71
CY2019Q4	noc	Yearly Discount Rate Change In Basis Points YearlyDiscountRateChangeInBasisPoints	-92
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	39600000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	36500000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	37681000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Projected Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation	34715000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	37135000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	34305000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	31741000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	28324000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	35967000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	32038000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	2036000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	2083000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	2108000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	2150000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	2187000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	11155000000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	90000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	127000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	86000000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	14000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	14000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	27000000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	97000000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y3M18D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	938000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	192
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	376000	shares
CY2018	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	321
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	455000	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	181
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	63000	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	250
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	796000	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	244
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P0Y9M18D
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	339000	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	274
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	383000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	222
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	51000	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	280
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	701000	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	278
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P0Y10M24D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	262000	shares
CY2020	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	350
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	296000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	305
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	64000	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	303
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	603000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	311
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y4M24D
CY2020	noc	Stock Issued During Period Fair Value Grant Date Share Based Compensation StockIssuedDuringPeriodFairValueGrantDateShareBasedCompensation	118000000	USD
CY2019	noc	Stock Issued During Period Fair Value Grant Date Share Based Compensation StockIssuedDuringPeriodFairValueGrantDateShareBasedCompensation	119000000	USD
CY2018	noc	Stock Issued During Period Fair Value Grant Date Share Based Compensation StockIssuedDuringPeriodFairValueGrantDateShareBasedCompensation	93000000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	320000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	318000000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	28000000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	11000000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	93000000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	75000000	USD
CY2020	us-gaap	Lease Cost LeaseCost	441000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	404000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	375000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1533000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1511000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	263000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	261000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1343000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1308000000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1606000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1569000000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	275000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	307000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	345000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	462000000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P12Y1M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y7M6D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.035	Rate
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.038	Rate
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	298000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	267000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	228000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	185000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	142000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	902000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2022000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	416000000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1606000000	USD
CY2020Q4	noc	Lessee Operating Lease Lease Notyet Commenced Value LesseeOperatingLeaseLeaseNotyetCommencedValue	361000000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4
CY2020	us-gaap	Revenues Revenues	36799000000	USD
CY2019	us-gaap	Revenues Revenues	33841000000	USD
CY2018	us-gaap	Revenues Revenues	30095000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	4065000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	3969000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	3780000000	USD
CY2020	us-gaap	Revenues Revenues	36799000000	USD
CY2020	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2019	us-gaap	Revenues Revenues	33841000000	USD
CY2019	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2018	us-gaap	Revenues Revenues	30095000000	USD
CY2018	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	1
CY2020	us-gaap	Revenues Revenues	36799000000	USD
CY2019	us-gaap	Revenues Revenues	33841000000	USD
CY2018	us-gaap	Revenues Revenues	30095000000	USD
CY2020	us-gaap	Revenues Revenues	36799000000	USD
CY2019	us-gaap	Revenues Revenues	33841000000	USD
CY2018	us-gaap	Revenues Revenues	30095000000	USD
CY2020Q4	us-gaap	Assets Assets	44469000000	USD
CY2019Q4	us-gaap	Assets Assets	41089000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1420000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1264000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1249000000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1005000000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	1018000000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	800000000	USD
CY2020Q1	us-gaap	Revenues Revenues	8620000000	USD
CY2020Q2	us-gaap	Revenues Revenues	8884000000	USD
CY2020Q3	us-gaap	Revenues Revenues	9083000000	USD
CY2020Q4	us-gaap	Revenues Revenues	10212000000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	934000000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	994000000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	985000000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1152000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	868000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	1005000000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.07
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.52
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	986000000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	330000000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.18
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.02
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.91
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.98
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.15
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.01
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.89
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.97
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	167700000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	166900000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	166800000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	166800000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	168400000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	167300000	shares
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.08
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	-409000000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	167300000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	167400000	shares
CY2019Q1	us-gaap	Revenues Revenues	8189000000	USD
CY2019Q2	us-gaap	Revenues Revenues	8456000000	USD
CY2019Q3	us-gaap	Revenues Revenues	8475000000	USD
CY2019Q4	us-gaap	Revenues Revenues	8721000000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	936000000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	946000000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	951000000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1136000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	863000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	861000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	933000000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.43
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.06
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.06
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.49
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.43
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	170000000.0	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	169700000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	169100000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	168400000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	170700000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	170300000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	169900000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	168400000	shares

Files In Submission

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2020 Q4 Form 10-K Financial Statement

#000113342121000006 Filed on January 28, 2021

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$NOC NORTHROP GRUMMAN CORP /DE/ Stock $noc

2020 Q4 Form 10-K Financial Statement

#000113342121000006 Filed on January 28, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NOC
NORTHROP GRUMMAN CORP /DE/ Stock $noc