Document and Entity Information - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Aug. 05, 2019
Entity Information [Line Items]
Entity Tax Identification Number		93-0609074
Trading Symbol		LPX
Entity Registrant Name	LOUISIANA-PACIFIC CORPORATION	LOUISIANA-PACIFIC CORPORATION
Entity Address, Address Line One		414 Union Street
City Area Code		Nashville, TN
Entity Address, Postal Zip Code		37219
City Area Code		(615)
Local Phone Number		986 - 5600
Entity Central Index Key		0000060519
Current Fiscal Year End Date		--12-31
Entity Filer Category		Large Accelerated Filer
Document Type	10-Q	10-Q
Document Period End Date	Jun. 30, 2019	Jun. 30, 2019
Entity File Number		1-7107
Document Fiscal Year Focus		2019
Document Fiscal Period Focus		Q2
Entity Current Reporting Status		Yes
Amendment Flag		false
Entity Emerging Growth Company		false
Entity Small Business		false
Entity Shell Company		false
Entity Common Stock, Shares Outstanding			123,612,522