XML 49 R38.htm IDEA: XBRL DOCUMENT v3.20.2
LONG-TERM DEBT - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 06, 2020
Feb. 25, 2020
Jun. 14, 2019
Apr. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]                    
Increase in pricing tier percent based on leverage ratio of greater than 4.50 to 1.00   0.125%                
Issuance cost         $ 13,300,000   $ 13,300,000     $ 14,200,000
Divestiture of principal repayments             16,900,000 $ 21,100,000    
Repayments of private placement notes               1,075,000,000.0    
Loss on early extinguishment of debt           $ 23,100,000   $ 23,100,000    
Private Placement Notes                    
Debt Instrument [Line Items]                    
Repayments of private placement notes     $ 1,075,000,000.000              
Loss on early extinguishment of debt     23,100,000              
Premiums payable     20,400,000              
Write-off of unamortized debt issuance costs     2,700,000              
Domestic Environmental Solutions Less Retained Business                    
Debt Instrument [Line Items]                    
Divestiture of principal repayments       $ 430,000,000.0            
Decrease of maximum consolidated leverage ratio 0.25%                  
$600 million Senior Notes, due 2024 | Senior Notes                    
Debt Instrument [Line Items]                    
Issuance cost     7,100,000              
Aggregate principal amount     600,000,000.0              
Quarter Ending on or Before December 31, 2021 | Maximum                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio   5.00%                
Quarter Ending on or Before December 31, 2021 | Maximum | Domestic Environmental Solutions Less Retained Business                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio 4.75%                  
Quarter Ending on or Before December 31, 2021 | Maximum | Domestic Environmental Solutions Group                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio   4.75%                
Quarter Ending on or After March 31, 2022 | Maximum                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio   4.50%                
Quarter Ending on or After March 31, 2022 | Maximum | Domestic Environmental Solutions Less Retained Business                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio 4.25%                  
Quarter Ending on or After March 31, 2022 | Maximum | Domestic Environmental Solutions Group                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio   4.25%                
Period Through December 31, 2020 | Term Loan Facility                    
Debt Instrument [Line Items]                    
Allowed additional cash back to EBITDA   $ 200,000,000                
Period until December 31, 2021 | Term Loan Facility                    
Debt Instrument [Line Items]                    
Allowed additional cash back to EBITDA   100,000,000                
Period Thereafter | Term Loan Facility                    
Debt Instrument [Line Items]                    
Allowed additional cash back to EBITDA   $ 0                
Fiscal Quarter After March 31, 2022 and Thereafter | Maximum                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio   4.50%                
Fifth Amendment                    
Debt Instrument [Line Items]                    
Issuance cost         $ 1,700,000   1,700,000      
Interest expense             400,000      
Debt weighted average maturity 1.4 years and 1.6 years | Maximum | Term Loan Facility                    
Debt Instrument [Line Items]                    
Maximum consolidated leverage ratio         3.89%       4.75%  
Fourth Amendment                    
Debt Instrument [Line Items]                    
Interest expense     200,000              
Issuance cost     $ 2,000,000.0              
Level 2                    
Debt Instrument [Line Items]                    
Estimated fair value of debt         $ 2,160,000,000   $ 2,160,000,000     $ 2,730,000,000