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Defined Benefit Pension Plans | 9 Months Ended
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Sep. 30, 2014
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 nine months ended September 30, 2014 and 2013. The net periodic pension cost included the following components:
| Quarter Ended September 30, |  | Nine Months Ended September 30,
Dollar amounts in millions | 2014 |  | 2013 |  | 2014 |  | 2013
Service cost | $ | 0.9 |  |  | $ | 0.8 |  |  | $ | 2.8 |  |  | $ | 2.5 |
Interest cost | 3.7 |  |  | 3.2 |  |  | 11.0 |  |  | 9.7 |
Expected return on plan assets | (4.2 | ) |  | (4.1 | ) |  | (12.7 | ) |  | (12.4 | )
Amortization of prior service cost | — |  |  | 0.1 |  |  | — |  |  | 0.2 |
Amortization of net loss | 1.4 |  |  | 1.8 |  |  | 4.2 |  |  | 5.5 |
Net periodic pension cost | $ | 1.8 |  |  | $ | 1.8 |  |  | $ | 5.3 |  |  | $ | 5.5 |
During the nine months ended September 30, 2014 and 2013, LP recognized $5.3 million and $5.5 million of pension expense for all of LP's defined benefit pension plans. During the nine months ended September 30, 2014, LP made $9.1 million in pension contributions for LP's benefit plans. LP expects to contribute between $11.0 million and $13.0 million to its pension plans in 2014.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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