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Defined Benefit Pension Plans
 6 Months Ended
Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Compensation and Employee Benefit Plans
DEFINED BENEFIT PENSION PLANS
The following table sets forth the net periodic pension cost for LP’s defined benefit pension plans during the quarter and six months ended June 30, 2016 and 2015. The net periodic pension cost included the following components:
 
Quarter Ended June 30,
 
Six Months Ended June 30,
Dollar amounts in millions
2016
 
2015
 
2016
 
2015
Service cost
$
1.2

 
$
1.0

 
$
2.4

 
$
2.0

Interest cost
3.3

 
3.4

 
6.7

 
6.8

Expected return on plan assets
(3.3
)
 
(3.8
)
 
(6.7
)
 
(7.6
)
Amortization of prior service cost 1
0.1

 
0.1

 
0.2

 
0.2

Amortization of net loss 1
1.4

 
1.8

 
2.8

 
3.6

Net periodic pension cost
$
2.7

 
$
2.5

 
$
5.4

 
$
5.0


1The amortization of prior service costs and net loss are included in the amounts reclassified from accumulated other comprehensive income (loss); see Note 14 for additional details. The net periodic pension cost is included in Cost of sales and Selling and administrative expense in the Consolidated Statements of Income.
During the six months ended June 30, 2016 and 2015, LP recognized $5.4 million and $5.0 million of pension expense for all of LP's defined benefit pension plans.
During the six months ended June 30, 2016, LP made $3.7 million in pension contributions to its defined benefit pension plans. LP expects to contribute between $2.0 million and $4.0 million to its defined benefit pension plans in the remaining months of 2016.