Guarantor and Non-Guarantor Subsidiaries Financial Information - Additional Information (Detail)	Dec. 31, 2019	Apr. 30, 2019	Dec. 31, 2018	Oct. 12, 2018	Oct. 09, 2018
5.000% Senior Secured Notes due 2023 | Acquisition Corp.
Condensed Financial Statements, Captions [Line Items]
Interest rate	5.00%
4.125% Senior Secured Notes due 2024
Condensed Financial Statements, Captions [Line Items]
Interest rate	4.125%		4.125%
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%
3.625% Senior Secured Notes due 2026 | Acquisition Corp.
Condensed Financial Statements, Captions [Line Items]
Interest rate	3.625%	3.625%			3.625%
5.500% Senior Notes due 2026 | Acquisition Corp.
Condensed Financial Statements, Captions [Line Items]
Interest rate	5.50%