Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2023	Feb. 05, 2024	Jun. 30, 2023
Cover [Abstract]
Entity Registrant Name	WEYERHAEUSER COMPANY
Trading Symbol	WY
Entity Central Index Key	0000106535
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Small Business	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		729,521,000
Entity Public Float			$ 24.4
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity File Number	1-4825
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	91-0470860
Entity Address, Address Line One	220 OCCIDENTAL AVENUE SOUTH
Entity Address, City or Town	SEATTLE
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98104-7800
City Area Code	(206)
Local Phone Number	539-3000
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Shares ($1.25 par value)
Security Exchange Name	NYSE
Documents Incorporated by Reference	Portions of the Notice of the 2024 Annual Meeting of Shareholders and Proxy Statement for the company’s Annual Meeting of Shareholders to be held May 10, 2024, are incorporated by reference into Part III
Auditor Name	KPMG LLP
Auditor Location	Seattle, Washington
Auditor Firm ID	185