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Guarantor and Non-Guarantor Subsidiaries Financial Information - Additional Information (Detail)
Jun. 30, 2019
Apr. 30, 2019
Oct. 12, 2018
Oct. 09, 2018
Jun. 30, 2018
5.00% Senior Secured Notes due 2023 | Acquisition Corp.          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 5.00%        
4.125% Senior Secured Notes due 2024 | Acquisition Corp.          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 4.125%   4.125% 4.125%  
4.875% Senior Secured Notes due 2024          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 4.875%       4.875%
4.875% Senior Secured Notes due 2024 | Acquisition Corp.          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 4.875%     4.875%  
3.625% Senior Secured Notes due 2026          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 3.625%        
3.625% Senior Secured Notes due 2026 | Acquisition Corp.          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 3.625% 3.625%   3.625%  
5.50% Senior Notes due 2026 | Acquisition Corp.          
Condensed Financial Statements, Captions [Line Items]          
Interest rate 5.50%