Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

v3.19.1
COMMITMENTS AND CONTINGENCIES - Narrative (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
office
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
plaintiff
claim
Sep. 30, 2018
USD ($)
Commitments and Contingencies Disclosure [Line Items]        
Period to provide free services     24 months  
Extension of period to provide free services   12 months    
Product liability | $ $ 11,200,000 $ 12,700,000    
Maximum potential future payments | $ 0      
Accruals related to guarantees and indemnities | $ $ 0 $ 0    
Indian Tribes and Nations        
Commitments and Contingencies Disclosure [Line Items]        
Pending claims | claim     3  
Maximum        
Commitments and Contingencies Disclosure [Line Items]        
Debt instrument, term (or less) 1 year      
United States        
Commitments and Contingencies Disclosure [Line Items]        
Pending claims | claim     1,000  
Number of plaintiffs | plaintiff     2,500  
Pending individual arbitration claims | claim     50  
Pending putative class action claims | claim     19  
Canada        
Commitments and Contingencies Disclosure [Line Items]        
Pending claims | claim     8  
Pending national class actions | claim     6  
Georgia        
Commitments and Contingencies Disclosure [Line Items]        
Pending claims | claim     4  
Number of claims combined into a single claim | claim     3  
Cybersecurity Incident        
Commitments and Contingencies Disclosure [Line Items]        
Number of state attorneys general offices company is in cooperation with | office 47      
Investigation, Remediation, Legal, And Other Professional Services        
Commitments and Contingencies Disclosure [Line Items]        
Insurance coverage | $     $ 125,000,000  
Insurance coverage deductible | $     $ 7,500,000.0  
Estimate of possible loss | $ $ 690,000,000      
Multi-State Investigation        
Commitments and Contingencies Disclosure [Line Items]        
Number of state attorneys general offices company is in cooperation with | office 46      
Public Records Litigation        
Commitments and Contingencies Disclosure [Line Items]        
Estimate of possible loss | $       $ 18,500,000
Letter of Credit        
Commitments and Contingencies Disclosure [Line Items]        
Outstanding guarantees | $ $ 0