Document and Entity Information Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2016	Feb. 13, 2017	Jul. 01, 2016
Entity Information [Line Items]
Entity Registrant Name	RAYTHEON CO/
Entity Central Index Key	0001047122
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Trading Symbol	RTN
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		292,880,000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Aggregate market value of the voting stock held by non-affiliates			$ 39.7