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Commitments and Contingencies - Collective Bargaining Agreements and Environmental Contingencies (Details) | 12 Months Ended
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Dec. 31, 2019 employee location item
Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Number of Location Entity Operates | location | 52
Total employees | Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Percentage of employees covered by collective bargaining agreements | 11.00%
Number of employees | employee | 1,690
Number of collective bargaining agreements that expire over the next six years | item | 62
Expiration period of collective bargaining agreements | 6 years
Employees covered by collective bargaining agreements that expire during 2020 |
Collective Bargaining Agreements |
Number of employees | employee | 400
Number of collective bargaining agreements that expire within one year | item | 18

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- Definition Represents the number of collective bargaining agreements that expire within one year. + References No definition available. + Details
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- Definition Represents the number of collective bargaining agreements that will expire at various times over the next six years. + References No definition available. + Details
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