Multipemployer Pension and Postretirement Plans Multiemployer Pension Plans Curtailments, Settlements and Termination Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 28, 2019 |
Dec. 29, 2018 |
Dec. 30, 2017 |
|
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
Multiemployer Plan, Contributions by Employer | $ 8.7 | $ 10.4 | $ 15.9 |
Multiemployer Plans, Postretirement Benefit | |||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
Multiemployer Plan, Contributions by Employer | $ 11.0 | $ 11.0 | $ 16.0 |