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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 09, 2024
Jun. 30, 2023
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Document Transition Report false    
Entity File Number 1-3157    
Entity Registrant Name INTERNATIONAL PAPER COMPANY    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 13-0872805    
Entity Address, Address Line One 6400 Poplar Avenue    
Entity Address, City or Town Memphis,    
Entity Address, State or Province TN    
Entity Address, Postal Zip Code 38197    
City Area Code 901    
Local Phone Number 419-9000    
Title of 12(b) Security Common Shares    
Trading Symbol IP    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
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     $ 10,960,397,116
Entity Common Stock, Shares Outstanding   346,353,824  
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000051434    
Current Fiscal Year End Date --12-31    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag true    
Documents Incorporated by Reference
Portions of the registrant’s proxy statement filed within 120 days of the close of the registrant’s fiscal year in connection with registrant’s 2024 annual meeting of shareholders are incorporated by reference into Part III of this Form 10-K.
    
Document Financial Statement Error Correction [Flag] false