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Defined Benefit Plans | 6 Months Ended
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Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract] |
Defined Benefit Plans |
1 2. | Defined Benefit Plans
The components of net periodic benefit cost for pension benefits for the six and three months ended June 30, 2019 and 2018 were as follows:
(In millions) |  | Six Months Ended June 30, |  |  | Three Months Ended June 30,
|  | Pension Benefits |  |  | Pension Benefits |  |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |  |
Service cost |  | $ | 0.2 |  |  | $ | 0.3 |  |  | $ | 0.1 |  |  | $ | 0.1 |  |
Interest cost |  |  | 16.4 |  |  |  | 15.3 |  |  |  | 8.2 |  |  |  | 7.7 |  |
Expected return on plan assets |  |  | (17.6 | ) |  |  | (20.5 | ) |  |  | (8.8 | ) |  |  | (10.2 | ) |
Net periodic benefit income |  | $ | (1.0 | ) |  | $ | (4.9 | ) |  | $ | (0.5 | ) |  | $ | (2.4 | ) |
Service cost relates to benefit accruals in an hourly Union defined benefit plan in our Doors & Security segment. All other defined benefit pension plans were frozen as of December 31, 2016.

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