Document and Entity Information Document	3 Months Ended
	Mar. 31, 2014	Apr. 17, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	NORTHROP GRUMMAN CORP /DE/
Entity Central Index Key	0001133421
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2014
Document Period End Date	Mar. 31, 2014
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		214,135,271