Recent and Prospective Accounting Pronouncements (Notes)	9 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	RECENT AND PROSPECTIVE ACCOUNTING PRONOUNCEMENTS In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification (ASC) 605, Revenue Recognition. The new revenue recognition standard requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective on January 1, 2018. LP has elected to adopt the revenue recognition standard in the first quarter of 2018 using the modified retrospective transition method with a cumulative adjustment to its opening balance of retained earnings. LP does not anticipate the adoption of this standard to have a material impact on LP’s financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350). The standard simplifies the accounting for goodwill impairments by eliminating step 2 from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The new standard is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. LP does not expect the adoption of this new standard to have a material impact on its consolidated results of operations and financial position. In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715). The standard amends the requirements in ASC 715 related to the income statement presentation of the components of net periodic benefit cost for an entity's sponsored defined benefit pension and other post-retirement plans. The new standard is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. LP does not expect the adoption of this new standard to have a material impact on its consolidated results of operations and financial position as only the presentation of the income statement will be affected. In May 2017, the FASB issued ASU 2017-09, Modification Accounting for Share-Based Payment Arrangements. The standard amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718. The new standard is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. LP does not expect the adoption of this new standard to have a material impact on its consolidated results of operations and financial position.

RECENT AND PROSPECTIVE ACCOUNTING PRONOUNCEMENTS

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification (ASC) 605, Revenue Recognition. The new revenue recognition standard requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective on January 1, 2018. LP has elected to adopt the revenue recognition standard in the first quarter of 2018 using the modified retrospective transition method with a cumulative adjustment to its opening balance of retained earnings. LP does not anticipate the adoption of this standard to have a material impact on LP’s financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350). The standard simplifies the accounting for goodwill impairments by eliminating step 2 from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The new standard is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. LP does not expect the adoption of this new standard to have a material impact on its consolidated results of operations and financial position.

In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715). The standard amends the requirements in ASC 715 related to the income statement presentation of the components of net periodic benefit cost for an entity's sponsored defined benefit pension and other post-retirement plans. The new standard is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. LP does not expect the adoption of this new standard to have a material impact on its consolidated results of operations and financial position as only the presentation of the income statement will be affected.

In May 2017, the FASB issued ASU 2017-09, Modification Accounting for Share-Based Payment Arrangements. The standard amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718. The new standard is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. LP does not expect the adoption of this new standard to have a material impact on its consolidated results of operations and financial position.