XML 116 R100.htm IDEA: XBRL DOCUMENT v3.22.0.1
Pension and Other Postretirement Benefits (Components Of The Plans' Net Periodic Benefits Cost) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service Cost $ 30.2 $ 32.0 $ 29.2
Interest cost 31.4 51.6 72.3
Expected return on assets (101.6) (111.6) (108.8)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 0.1 0.7 0.2
Recognized actuarial loss 21.7 33.8 45.2
Settlement loss 11.4 10.5 9.5
Total Net Periodic Benefits Cost (6.8) 17.0 47.6
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service Cost 6.2 6.6 5.1
Interest cost 9.9 15.4 19.2
Expected return on assets (15.3) (14.4) (13.1)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (2.2) (2.1) (3.2)
Recognized actuarial loss 4.6 4.9 2.0
Settlement loss 0.0 1.5 0.0
Total Net Periodic Benefits Cost $ 3.2 $ 11.9 $ 10.0