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Retirement Plans and Post Retirement Benefits Defined Contribution Plans and Other Benefit Plans (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2009
U.S. 401(k) Plans
Dec. 31, 2013
U.S. 401(k) Plans
Dec. 31, 2013
Canada Defined Contribution Plans
Dec. 31, 2013
Other Postretirement Benefits
Dec. 31, 2012
Other Postretirement Benefits
Dec. 31, 2012
Supplemental employee retirement plans, defined benefit
Dec. 31, 2012
Supplemental employee retirement plans, defined benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]                    
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments $ 0 $ (2.2) $ 0           $ (2.2) $ (2.2)
Defined Benefit Plan, Benefits Paid 18.6 27.8               10.4
Defined Contribution Plans [Abstract]                    
Maximum percentage of employee's wages eligible for company match       3.50%   3.00%        
Shares of LP common stock included in plan assets         2.6          
Total market value of plan assets represented by LP common stock         15.40%          
Percentage of base contribution           2.50%        
Employer matching percentage           50.00%        
Expenses related to defined contribution plans and multiemployer plan 8.3 5.2 5.5              
Funded status (51.8) (92.7)         8.2 9.7    
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" $ (1.9) $ (1.5)