Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Additional Information (Details)

v3.10.0.1
COMMITMENTS AND CONTINGENCIES - Additional Information (Details)
customer in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 10 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
office
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
lawsuit
Jun. 30, 2018
USD ($)
office
Jun. 30, 2018
USD ($)
office
Dec. 31, 2017
USD ($)
lawsuit
customer
Sep. 07, 2017
USD ($)
Commitments and Contingencies Disclosure [Line Items]                
Accruals related to guarantees and indemnities   $ 0   $ 0 $ 0 $ 0 $ 0  
Maximum                
Commitments and Contingencies Disclosure [Line Items]                
Debt instrument, term (or less)         1 year      
United States                
Commitments and Contingencies Disclosure [Line Items]                
Pending class actions | lawsuit       3     3  
Canada                
Commitments and Contingencies Disclosure [Line Items]                
Pending class actions | lawsuit       6     6  
Pending national class actions | lawsuit       4     4  
Stayed class actions | lawsuit       1     1  
Cybersecurity Incident                
Commitments and Contingencies Disclosure [Line Items]                
Number of customers impacted | customer             145,500  
Cybersecurity incident remediation, legal, and other professional costs $ 87,500,000 0 $ 4,100,000 $ 76,500,000        
Insurance settlements receivable 0 0 10,000,000 35,000,000 $ 0 0 $ 35,000,000 $ 0
Insurance recoveries   35,000,000     $ 45,000,000 $ 95,000,000    
Proceeds from insurance settlement $ 0 $ 45,000,000 $ 35,000,000 $ 15,000,000        
Number of state attorneys general offices company is in cooperation with | office   48     48 48    
Cybersecurity Incident | United States and Canada                
Commitments and Contingencies Disclosure [Line Items]                
Number of customers, credit card information accessed | customer             209  
Cybersecurity Incident | United States                
Commitments and Contingencies Disclosure [Line Items]                
Number of customers, personal information accessed | customer             182  
Number of customers, name and partial driver's license information stolen | customer             2,400  
Cybersecurity Incident | Canada                
Commitments and Contingencies Disclosure [Line Items]                
Number of customers, personal information accessed | customer             19  
Cybersecurity Incident | United Kingdom                
Commitments and Contingencies Disclosure [Line Items]                
Number of customers, personal information accessed | customer             860  
Free Credit File Monitoring And Identity Theft Protection Offering                
Commitments and Contingencies Disclosure [Line Items]                
Cybersecurity incident remediation, legal, and other professional costs             $ 50,700,000  
Free Credit File Monitoring And Identity Theft Protection Offering | Selling, General and Administrative Expenses                
Commitments and Contingencies Disclosure [Line Items]                
Cybersecurity incident remediation, legal, and other professional costs         $ 4,100,000      
Investigation, Remediation, Legal, And Other Professional Services                
Commitments and Contingencies Disclosure [Line Items]                
Cybersecurity incident remediation, legal, and other professional costs             $ 113,300,000  
Insurance coverage         125,000,000      
Insurance coverage deductible         $ 7,500,000.0