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RESTRUCTURING AND OTHER CHARGES RESTRUCTURING AND OTHER CHARGES (Footnotes) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2015
Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]      
Assets   $ 27,967us-gaap_Assets $ 28,684us-gaap_Assets
Courtland Mill Shutdown [Member]      
Restructuring Cost and Reserve [Line Items]      
Accelerated depreciation 430us-gaap_RestructuringReserveAcceleratedDepreciation
/ us-gaap_RestructuringPlanAxis
= ip_CourtlandmillshutdownMember
   
Site closure costs 30ip_Restructuringandrelatedcostssiteclosurecosts
/ us-gaap_RestructuringPlanAxis
= ip_CourtlandmillshutdownMember
   
Severance costs 15us-gaap_SeveranceCosts1
/ us-gaap_RestructuringPlanAxis
= ip_CourtlandmillshutdownMember
   
Other closure costs $ 20us-gaap_OtherRestructuringCosts
/ us-gaap_RestructuringPlanAxis
= ip_CourtlandmillshutdownMember