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Defined Benefit Plan (Tables)
3 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
The components of net periodic benefit cost follows:
Three Months Ended
March 31,
(in millions)
20192018
Service cost$0.7 $0.8 
Interest cost1.5 1.4 
Expected return on plan assets(2.4)(2.6)
Amortization of unrecognized loss1
0.9 1.1 
Net periodic benefit cost$0.7 $0.7 
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 months ended March 31, 2019, and 2018, respectively.