Annual report pursuant to Section 13 and 15(d)

Postretirement Benefits Schedule of Net Periodic Benefit Costs (Details)

v3.20.4
Postretirement Benefits Schedule of Net Periodic Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 26, 2020
 [1]
Jun. 27, 2020
 [1]
Mar. 28, 2020
Dec. 31, 2019
 [1]
Sep. 28, 2019
 [1]
Jun. 29, 2019
Mar. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]                      
Settlement Loss $ 0.0 $ 0.2 $ (1.3) $ 0.0 $ (1.3) $ 294.1 $ 0.0 $ 0.0 $ (1.1) [1] $ 292.8 [1] $ 0.0
Pension Plans [Member]                      
Defined Benefit Plan Disclosure [Line Items]                      
Interest Cost                 0.7 6.0 22.6
Expected Return on Plan Assets                 0.0 (7.4) (24.8)
Amortization of Prior Service Credits                 0.0 0.0 0.0
Amortization of Net Actuarial Losses                 0.6 5.8 9.9
Settlement Loss                 (1.1) 292.8 0.0
Net Pension and Other Benefit Costs                 0.2 297.2 7.7
Other Postretirement Benefit Plans [Member]                      
Defined Benefit Plan Disclosure [Line Items]                      
Interest Cost                 0.8 1.3 1.1
Expected Return on Plan Assets                 0.0 0.0 0.0
Amortization of Prior Service Credits                 (0.7) (0.7) (0.7)
Amortization of Net Actuarial Losses                 0.0 0.0 0.0
Settlement Loss                 0.0 0.0 0.0
Net Pension and Other Benefit Costs                 $ 0.1 $ 0.6 $ 0.4
[1] (D) Pension settlement charges are discussed in Note 17 – Postretirement Benefits