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Pension Benefit Plans
6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Pension Benefit Plans
8. Pension Benefit Plans:

The components of net periodic benefit cost for pension benefits were as follows (in millions):
For the Three Months Ended June 30,For the Six Months Ended June 30,
2024202320242023
Service cost$0.4 $0.5 $0.8 $1.1 
Interest cost2.2 2.2 4.3 4.5 
Expected return on plan assets(1.9)(2.4)(3.8)(4.7)
Recognized actuarial loss0.2 0.2 0.4 0.4 
Other— — — (0.3)
Settlements and curtailments0.3 0.1 0.3 0.3 
Net periodic benefit cost$1.2 $0.6 $2.0 $1.3