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Retirement Plans and Post Retirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs and Assumptions Used in Calculating Net Periodic Benefit Cost [Table Text Block]

The components of LP’s net periodic pension costs and the assumptions related to those costs consisted of the following:
 
 
Year ended December 31,
Dollar amounts in millions
2016
 
2015
 
2014
Service cost
$
4.3

 
$
3.8

 
$
3.5

Interest cost
13.1

 
13.1

 
14.1

Expected return on plan assets
(13.1
)
 
(15.0
)
 
(16.9
)
Amortization of prior service cost and net transition asset
0.5

 
0.5

 
—

Amortization of net actuarial loss
5.4

 
6.8

 
5.5

Net periodic pension cost
$
10.2

 
$
9.2

 
$
6.2

Loss (gain) due to settlement
$
—

 
$
0.8

 
$
—

 
 
 
 
 
 
Discount rate
4.1
%
 
3.8
%
 
4.6
%
Weighted rate of compensation increase
0.7
%
 
0.7
%
 
0.8
%
Weighted expected return on plan assets
5.4
%
 
6.0
%
 
6.7
%
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Other changes in plan assets and benefit obligations recognized in other comprehensive income (OCI):
 
 
Year ended December 31,
Dollar amounts in millions
2016
 
2015
 
2014
Net actuarial (gain) loss
$
4.8

 
$
0.8

 
$
44.2

Amortization of net actuarial loss
(5.4
)
 
(7.6
)
 
(5.5
)
Amortization of prior service cost
(0.5
)
 
(0.5
)
 
9.4

Foreign exchange rate changes
—

 
(0.1
)
 
—

Total recognized in OCI
$
(1.1
)
 
$
(7.4
)
 
$
48.1
Schedule of Net Funded Status and Assumptions Used in Calculating Benefit Obligation [Table Text Block]
The projected benefit obligation is the actuarial present value of benefits attributable to employee service rendered to date, including the effects of estimated salary increases. The benefit plan obligation, funded status and the assumptions related to the obligations as of the measurement date for each year presented as of December 31 follow:
  
December 31,
Dollar amounts in millions
2016
 
2015
Change in benefit obligation:
 
 
 
Beginning of year balance
$
330.8

 
$
364.1

Service cost
4.3

 
3.8

Interest cost
13.1

 
13.1

Actuarial (gain)/loss
3.5

 
(19.4
)
Foreign exchange rate changes
1.6

 
(9.7
)
Benefits paid
(21.4
)
 
(21.1
)
End of year balance
$
331.9

 
$
330.8

Change in assets (fair value):
 
 
 
Beginning of year balance
$
237.4

 
$
268.0

Actual return on plan assets
11.8

 
(5.2
)
Employer contribution
10.5

 
4.9

Foreign exchange rate changes
1.6

 
(9.2
)
Benefits paid
(21.4
)
 
(21.1
)
End of year balance
$
239.9

 
$
237.4

Funded status
$
(92.0
)
 
$
(93.4
)
Weighted average assumptions for obligations as of measurement date
 
 
 
Discount rate for obligations
3.9
%
 
3.8
%
Rate of compensation increase
0.7
%
 
0.6
%
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
The amounts recognized in LP’s Consolidated Balance Sheets as of December 31 consist of the following:
 
Dollar amounts in millions
2016
 
2015
Noncurrent pension assets, included in “Other assets”
$
0.9

 
$
0.5

Current pension liabilities, included in “Accounts payable and accrued liabilities”
(0.2
)
 
(3.7
)
Noncurrent pension liabilities, included in “Other long-term liabilities”
(92.7
)
 
(90.2
)
Total
$
(92.0
)
 
$
(93.4
)
Amounts recognized in other comprehensive income—pre-tax
 
 
 
Net actuarial loss
$
140.6

 
$
140.8

Prior service cost
8.4

 
9.0

Total
$
149.0

 
$
149.8
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]
The amounts of accumulated other comprehensive income that is expected to be amortized as expense during 2017 is:
 
Dollar amounts in millions
 
Net actuarial loss
$
6.0

Prior service cost
0.5

Total
$
6.5
Schedule of Expected Benefit Payments [Table Text Block]
The benefits expected to be paid from the benefit plans, which reflect expected future service, are as follows:
 
Dollar amounts in millions
 
Year
 
2017
19.7

2018
29.8

2019
19.4

2020
20.5

2021
20.4

2022– 2026
103.7
Schedule of Allocation of Plan Assets [Table Text Block]
The fair value of LP’s pension plan assets at December 31, 2016 and December 31, 2015, fair value asset categories and the level of inputs as defined in Note 3 are as follows:
 
Dollar amounts in millions
Asset Category
December 31, 2016
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Equity investment funds:(a)
 
 
 
 
 
 
 
  Domestic stock funds
$
51.3

 
$
38.0

 
$
13.3

 
$
—

  International stock funds
38.5

 
13.5

 
25.0

 
—

Fixed income investment funds:(b)
 
 
 
 
 
 
 
  Domestic bond funds
36.8

 
36.8

 
—

 
—

  International bond funds
36.0

 
—

 
36.0

 
—

Multi-strategy funds(c)
75.1

 
62.9

 
—

 
12.2

Cash & cash equivalents
2.2

 
—

 
2.2

 
—

Total
$
239.9

 
$
151.2

 
$
76.5

 
$
12.2

  _______________
(a)
Equity investments include investments in funds that are primarily invested in large capitalization U.S. and international equity securities and a mutual fund.
(b)
Fixed income investments include investments in funds that are primarily invested in a diversified portfolio of investment grade U.S. and international debt securities.
(c)
The multi-strategy funds invest in various hedge funds that employ a fund of funds strategy.
Dollar amounts in millions
Asset Category
December 31, 2015
 
Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)
 
Significant
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Equity investment funds:(a)
 
 
 
 
 
 
 
  Domestic stock funds
$
50.7

 
$
39.0

 
$
11.7

 
$
—

  International stock funds
34.0

 
11.7

 
22.3

 
—

Fixed income investment funds:(b)


 
 
 
 
 
 
  Domestic bond funds
32.1

 
32.1

 
—

 
—

  International bond funds
34.5

 
—

 
34.5

 
—

Multi-strategy funds(c)
84.2

 
70.9

 
—

 
13.3

Cash & cash equivalents
1.9

 
—

 
1.9

 
—

Total
$
237.4

 
$
153.7

 
$
70.4

 
$
13.3

 _______________
(a) 
Equity investments include investments in funds that are primarily invested in large capitalization U.S. and international equity securities and a mutual fund.
(b) 
Fixed income investments include investments in funds that are primarily invested in a diversified portfolio of investment grade U.S. and international debt securities.
(c) 
The multi-strategy funds invest in various hedge funds that employ a fund of funds strategy.
The actual and target allocations at the measurement dates are as follows:  
 
Target
Allocation
2016
 
Actual
Allocation
2016
 
2015
Asset category
 
 
 
 
 
US Plans
 
 
 
 
 
Equity securities
40
%
 
40
%
 
38
%
Debt securities
20
%
 
20
%
 
17
%
Multi-Strategy Funds
40
%
 
40
%
 
45
%
Other, including cash and cash equivalents
—
%
 
—
%
 
—
%
Total Allocation for US Plans
100
%
 
100
%
 
100
%
 
 
 
 
 
 
Non-US Plans
 
 
 
 
 
Equity securities
27
%
 
29
%
 
28
%
Debt securities
71
%
 
70
%
 
71
%
Other, including cash and cash equivalents
2
%
 
1
%
 
1
%
Total Allocation for Non-US Plans
100
%
 
100
%
 
100
%
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]
The following table summarizes assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the period.
 
Dollar amounts in millions
Multi-Strategy
Funds
Balance at January 1, 2015
$
26.1

Total unrealized gains (losses)
—

Contribution (redemption)
(13.0
)
Management fees
0.2

Balance at December 31, 2015
$
13.3

Total unrealized gains (losses)
$
0.3

Contribution (redemption)
(1.5
)
Management fees
0.1

Balance at December 31, 2016
$
12.2