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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Summary of Components of Net Periodic Benefit Cost The components of net periodic benefit cost follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
(in millions)
2024202320242023
Service cost$0.5 $0.6 $1.1 $1.1 
Interest cost1.5 1.5 3.0 3.1 
Expected return on plan assets(2.0)(2.1)(3.9)(4.1)
Amortization of unrecognized loss(1)
0.6 0.4 1.2 0.7 
Net periodic benefit cost$0.6 $0.4 $1.4 $0.8 
(1)Includes amortization of unrecognized actuarial (gain) loss and prior service credits and excludes provision for income tax of $(0.2) million and $(0.3) million for the three and six months ended June 30, 2024, respectively, and $(0.1) million and $(0.2) million for the three and six months ended June 30, 2023, respectively.