XML 91 R80.htm IDEA: XBRL DOCUMENT v3.21.1
Pension and Other Retiree Benefits (Multi-Employer) (Details) - Pension - PACE Industry Union-Management Pension Fund - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Multiemployer Plans [Line Items]      
Minimum Period in Years for Withdrawal Liability 20 years    
Multiemployer Plans, Period Contributions, Significance of Contributions [true false]   false  
Multiemployer Plan, Pension, Significant, Certified Zone Status, Date Dec. 31, 2020 Dec. 31, 2019  
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List] Red Red  
FIP/RP Status Implemented    
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost $ 0.1 $ 0.2 $ 0.3
Surcharge Imposed Yes    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Jun. 30, 2023