Retirement Plans and Post Retirement Benefits Defined Contribution Plans and Other Benefit Plans (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plans [Abstract]
Expenses related to defined contribution plans and multiemployer plan	$ 10.0
Funded status	$ (18.0)	$ (22.0)
Deferred Compensation Arrangements [Abstract]
Deferred compensation plan maximum deferral percentage	90.00%
Deferred compensation plan, employer contributions and related earnings, maximum vesting period	5 years
Deferred compensation liability included in "Other long-term liabilities"	$ (2.0)	$ (1.0)
US Defined Contribution Plan [Member]
Defined Contribution Plans [Abstract]
Maximum percentage of employee's wages eligible for company match	5.00%
Shares of LP common stock included in plan assets	1
Total market value of plan assets represented by LP common stock	7.00%
Canadian Defined Contribution Plan [Member]
Defined Contribution Plans [Abstract]
Maximum percentage of employee's wages eligible for company match	3.00%
Percentage of base contribution	3.00%
Employer matching percentage	50.00%
Non-US
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Defined Benefit Plan, Actual Plan Asset Allocation	100.00%	100.00%
Non-US \| Debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	90.00%
Defined Benefit Plan, Actual Plan Asset Allocation	90.00%	90.00%
Non-US \| Cash and Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10.00%
Defined Benefit Plan, Actual Plan Asset Allocation	10.00%	10.00%
UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Defined Benefit Plan, Actual Plan Asset Allocation	100.00%	100.00%
UNITED STATES \| Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40.00%
Defined Benefit Plan, Actual Plan Asset Allocation	40.00%	26.00%
UNITED STATES \| Debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40.00%
Defined Benefit Plan, Actual Plan Asset Allocation	40.00%	52.00%
UNITED STATES \| Multi-strategy Funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	20.00%
Defined Benefit Plan, Actual Plan Asset Allocation	20.00%	22.00%
Other Postretirement Benefits Plan [Member]
Defined Contribution Plans [Abstract]
Funded status	$ 7.0	$ 9.0

Deferred Compensation Arrangement, Employer Contributions and Earnings, Maximum Vesting Period

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Deferred Compensation Arrangement, Maximum Deferral Percentage

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Defined Benefit Plan, Actual Plan Asset Allocation

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Defined Contribution Plan, Base Annual Contribution Per Employee, Percent

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Defined Contribution Plan, Number of Shares of Equity Securities Issued by Employer

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Defined Benefit Plan, Percentage of Employer and Related Party Securities Included in Plan Assets

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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Amount of contributions made to multiemployer plan by employer.

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