v3.19.1
Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Acquired Finite Lived Intangible Assets [Line Items]    
Goodwill impairment charges $ 13,678,000 $ 0
Amortization expense 266,000,000 $ 54,000,000
Definite-lived intangible assets, amortization expense, 2019 252,000,000  
Definite-lived intangible assets, amortization expense, 2020 252,000,000  
Definite-lived intangible assets, amortization expense, 2021 236,000,000  
Definite-lived intangible assets, amortization expense, 2022 143,000,000  
Unitron Acquisition [Member] | Tradename and Covenant Not to Compete [Member]    
Acquired Finite Lived Intangible Assets [Line Items]    
Impairment charge related to write-off $ 62,000,000  
OneClick [Member] | Tradenames [Member]    
Acquired Finite Lived Intangible Assets [Line Items]    
Amortization period 60 months  
OneClick [Member] | Covenants [Member]    
Acquired Finite Lived Intangible Assets [Line Items]    
Amortization period 48 months  
Verykool Business Segment [Member]    
Acquired Finite Lived Intangible Assets [Line Items]    
Goodwill impairment related to discontinued operation $ 3,343,000