XML 28 R17.htm IDEA: XBRL DOCUMENT v3.21.2
Retirement Plans
 9 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
The components of net periodic benefit cost for our pension plans are presented below.
Three months endedNine months ended
June 30,June 30,
 2021202020212020
 (in millions)
Service cost$0.4 $0.4 $1.2 $1.2 
Pension costs (benefits) other than service:
Interest cost2.5 2.8 7.5 8.4 
Expected return on plan assets(3.9)(4.2)(11.7)(12.6)
Amortization of actuarial net loss0.6 0.7 1.8 2.0 
Pension benefits other than service(0.8)(0.7)(2.4)(2.2)
Net periodic benefit$(0.4)$(0.3)$(1.2)$(1.0)

The amortization of actuarial losses, net of tax, is recorded as a component of other comprehensive loss.