XML 64 R53.htm IDEA: XBRL DOCUMENT v3.19.2
Pension Plan (Tables)
6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Schedule of defined benefit plans
  Six Months Ended 
   June 30, 
   2019   2018 
    (in millions) 
Components of net periodic benefit:          
           
Interest cost  $1.4   $1.5 
Expected return on plan assets   (1.8)   (1.9)
Net periodic benefit  $(0.4)  $(0.4)