XML 89 R77.htm IDEA: XBRL DOCUMENT v3.19.2
Commitments and Contingencies (Legal, Letters of Credit, Bonds, Self-Insurance) (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Commitments and Contingencies [Line Items]    
Letters of credit issued $ 141.7 $ 128.4
Self-Insurance [Member] | Other Long-Term Assets [Member] | Cash [Member]    
Commitments and Contingencies [Line Items]    
Cash collateral held by insurance carriers 1.6 1.6
Self-Insurance [Member] | Workers' Compensation, General and Automobile Policies [Member]    
Commitments and Contingencies [Line Items]    
Self-insurance reserve 114.7 108.9
Self-Insurance [Member] | Workers' Compensation, General and Automobile Policies [Member] | Other Long-Term Liabilities [Member]    
Commitments and Contingencies [Line Items]    
Self-insurance reserve, non-current 75.2 70.8
Self-Insurance [Member] | Employee Group Medical Claims [Member]    
Commitments and Contingencies [Line Items]    
Self-insurance reserve 4.8 2.9
Performance and Payment Bonds [Member]    
Commitments and Contingencies [Line Items]    
Bonded projects, estimated costs to complete 179.9 53.0
Performance and Payment Bonds [Member] | Subsidiaries [Member]    
Commitments and Contingencies [Line Items]    
Outstanding bonds, amount 453.0 123.6
Financial Guarantees [Member] | Self-Insurance [Member] | Workers' Compensation, General and Automobile Policies [Member]    
Commitments and Contingencies [Line Items]    
Letters of credit issued 67.6 67.6
Surety Bonds [Member] | Self-Insurance [Member]    
Commitments and Contingencies [Line Items]    
Outstanding bonds, amount 34.8 $ 34.8
Canadian Acquisition Arbitration [Member]    
Commitments and Contingencies [Line Items]    
Favorable arbitration award 60.0  
Collections of arbitration award 32.0  
Canadian Acquisition Arbitration [Member] | Legal Fees [Member]    
Commitments and Contingencies [Line Items]    
Collections of arbitration award 16.0  
Canadian Acquisition Arbitration [Member] | Interest Costs [Member]    
Commitments and Contingencies [Line Items]    
Collections of arbitration award $ 5.0