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Fair Value Measurements - Summary of Non-Recurring Fair Value Measurement (Detail) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Property and equipment, net $ 824,748   $ 836,206
Goodwill, Net Carrying Value 3,695,742   3,753,493
Other intangible assets, Net Carrying Value 1,330,599   1,379,546
Other intangible assets, Total Impairment Charges   $ 89,000  
Net Carrying Value 15,700,414   $ 16,197,196
Total Impairment Charges 75,171 89,037  
Fair Value Measurements, Non-recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Property and equipment, net 9,875    
Property and equipment, Total Impairment Charges 21,663    
Goodwill, Net Carrying Value 421,574    
Goodwill, Total Impairment Charges 25,000    
Other intangible assets, Net Carrying Value 13,123 16,000  
Other intangible assets, Total Impairment Charges 28,508 89,037  
Net Carrying Value 444,572    
Total Impairment Charges 75,171    
Fair Value Measurements, Non-recurring [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Property and equipment, Fair Value Measured and Recorded Using 9,875    
Goodwill, Fair Value Measured and Recorded Using 421,574    
Other intangible assets, Fair Value Measured and Recorded Using 13,123 $ 16,000  
Fair Value Measured and Recorded Using $ 444,572