XML 120 R76.htm IDEA: XBRL DOCUMENT v3.22.2
Pension and Postretirement Benefit Plans (Net Pension And Postretirement Cost) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Pension benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 3.3 $ 3.7 $ 6.6 $ 7.8
Interest cost 3.8 3.2 7.8 6.4
Expected return on plan assets (4.4) (7.9) (9.0) (15.7)
Amortization of net actuarial losses 2.2 3.4 4.4 7.4
Amortization of prior service cost 0.0 0.1 0.1 0.6
Curtailment 0.0 0.0 0.0 (1.2)
Net periodic pension cost 4.9 2.5 9.9 5.3
Postretirement benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0.0 0.0 0.1 0.1
Interest cost 0.3 0.2 0.5 0.4
Amortization of prior service cost 0.0 0.0 0.1 0.0
Net periodic pension cost $ 0.3 $ 0.2 $ 0.7 $ 0.5
ENPP        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, minimum age to receive benefits 65 years   65 years