Stockholders' Equity ESPP (Details) shares in Millions	Dec. 31, 2020 shares
Equity [Abstract]
Shares available for grant, Employee Stock Purchase Plan	2,000,000

Shares available for grant, Employee Stock Purchase Plan

No definition available.

Name:	lpx_SharesavailableforgrantEmployeeStockPurchasePlan
Namespace Prefix:	lpx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant