Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.20.2
COMMITMENTS AND CONTINGENCIES (Details)
 9 Months Ended 12 Months Ended
Jul. 22, 2019
USD ($)
office
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
claim
Dec. 31, 2017
claim
plaintiff
Commitments and Contingencies Disclosure [Line Items]          
Maximum potential future payments   $ 0      
Maximum          
Commitments and Contingencies Disclosure [Line Items]          
Debt instrument, term (or less)   1 year      
Georgia          
Commitments and Contingencies Disclosure [Line Items]          
Pending claims | claim         4
Number of claims combined into a single claim | claim       3  
Canada          
Commitments and Contingencies Disclosure [Line Items]          
Pending claims | claim         5
Pending national class actions | claim         4
Number of plaintiffs | plaintiff         19,000
Cybersecurity Incident          
Commitments and Contingencies Disclosure [Line Items]          
Loss related to settlement $ 380,500,000        
Number of state attorneys general offices company is in cooperation with | office 48        
Litigation settlement, additional contributions for unreimbursed costs and expenses $ 125,000,000.0        
Cybersecurity Incident | Maximum          
Commitments and Contingencies Disclosure [Line Items]          
Litigation settlement expense $ 80,500,000        
Letter of Credit          
Commitments and Contingencies Disclosure [Line Items]          
Outstanding guarantees   $ 0      
Other Current Liabilities | Cybersecurity Incident          
Commitments and Contingencies Disclosure [Line Items]          
Loss related to settlement     $ 800,900,000