v3.26.1
Cover Page - shares
 6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Document And Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 1-7107  
Entity Registrant Name LOUISIANA-PACIFIC CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 1610 West End Avenue  
Entity Address, Address Line Two Suite 200  
Entity Address, City or Town Nashville  
Entity Address, State or Province TN  
Entity Address, Postal Zip Code 37203  
Entity Tax Identification Number 93-0609074  
City Area Code (615)  
Local Phone Number 986 - 5600  
Title of 12(b) Security Common Stock, $1 par value  
Trading Symbol LPX  
Security Exchange Name NYSE  
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 Common Stock, Shares Outstanding   69,923,410
Entity Central Index Key 0000060519  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false