XML 61 R48.htm IDEA: XBRL DOCUMENT v3.21.1
Pension and Other Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Pension [Member]    
Components of Net Periodic Benefit Cost (Credit) [Abstract]    
Service Cost $ 2.7 $ 2.6
Interest Cost [1] 6.1 7.0
Expected Return on Plan Assets [1] (10.8) (10.7)
Amortization of Prior Service Credits [1] 0.0 0.0
Amortization of Net Loss [1] 4.7 3.2
Net Periodic Benefit Cost (Credit) 2.7 2.1
Employer Contributions to Defined Benefit Plans 10.3 10.7
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year 0.0  
Other Postretirement [Member]    
Components of Net Periodic Benefit Cost (Credit) [Abstract]    
Service Cost 0.9 0.8
Interest Cost [1] 1.1 1.3
Expected Return on Plan Assets [1] (2.4) (2.5)
Amortization of Prior Service Credits [1] (1.9) (2.0)
Amortization of Net Loss [1] 0.7 0.3
Net Periodic Benefit Cost (Credit) (1.6) (2.1)
Employer Contributions to Defined Benefit Plans 0.0 $ 0.0
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year $ 0.0  
[1] These components of net periodic benefit cost (credit) are included in the line item “Other” under Other Income (Expense) on the Consolidated Statement of Income.