DEI Document - USD ($) $ in Billions	12 Months Ended
DEI Document - USD ($) $ in Billions	Dec. 31, 2019	Feb. 10, 2020	Jun. 28, 2019
DEI [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-13699
Entity Registrant Name	RAYTHEON COMPANY
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-1778500
Entity Address, Address Line One	870 Winter Street
Entity Address, City or Town	Waltham
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02451
City Area Code	781
Local Phone Number	522-3000
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	RTN
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 48.3
Entity Common Stock, Shares Outstanding		278,441,000
Documents Incorporated by Reference [Text Block]	None.
Entity Central Index Key	0001047122
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	true
Amendment Description	This Amendment is being filed solely for the purposes of (1) providing the information required in Part III of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019 because a definitive proxy statement containing such information will not be filed within 120 days after the end of such fiscal year should the Merger be completed as expected and (2) updating the information required in Item IA of Part I with respect to the developing risks associated with the recent outbreak of a novel strain of coronavirus. In addition, in accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the Exchange Act), Item 15 of Part IV of the Original Filing is being amended and restated solely to include as exhibits new certifications by the Company’s principal executive officer and principal financial officer.

RAYTHEON CO/ 10-K/A