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Employee Benefit Plans | 6 Months Ended
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Jun. 30, 2022
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract] |
Employee Benefit Plans | 4. Employee Benefit Plans Components of net periodic pension benefit cost were as follows (in millions):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2.6 |  |  | $ | 2.8 |  |  | $ | 5.2 |  |  | $ | 5.7 |
Interest cost |  |  | 4.2 |  |  |  | 4.1 |  |  |  | 8.5 |  |  |  | 8.2 |
Expected return on plan assets |  |  | (5.1 | ) |  |  | (4.9 | ) |  |  | (10.3 | ) |  |  | (9.9 | )
Amortization of prior service cost (benefit) |  |  | 0.6 |  |  |  | 0.6 |  |  |  | 1.1 |  |  |  | 1.1 |
Amortization of net actuarial loss (gain) |  |  | 0.2 |  |  |  | 1.4 |  |  |  | 0.4 |  |  |  | 2.6 |
Expenses paid |  |  | 0.8 |  |  |  | 0.8 |  |  |  | 1.6 |  |  |  | 1.6 |
Net periodic benefit cost |  | $ | 3.3 |  |  | $ | 4.8 |  |  | $ | 6.5 |  |  | $ | 9.3 |
Components of net periodic other post-employment benefit cost were as follows (in millions):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 0.5 |  |  | $ | 0.6 |  |  | $ | 1.1 |  |  | $ | 1.1 |
Interest cost |  |  | 0.4 |  |  |  | 0.3 |  |  |  | 0.7 |  |  |  | 0.6 |
Amortization of prior service cost (benefit) |  |  | (0.4 | ) |  |  | (0.4 | ) |  |  | (0.7 | ) |  |  | (0.7 | )
Amortization of net actuarial loss (gain) |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.2 |  |  |  | 0.1 |
Net periodic benefit cost |  | $ | 0.6 |  |  | $ | 0.6 |  |  | $ | 1.3 |  |  | $ | 1.1 |
Components of net periodic benefit cost other than “Service cost” and “Expenses paid” are included in “Miscellaneous, net” in the Condensed Consolidated Statements of Income.

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