Fair Value Measurements - Carrying Amount of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
5.750% Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Interest rate, stated percentage	5.75%
5.50% Senior Secured Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Interest rate, stated percentage	5.50%
Carrying Amount
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	$ 4,931,180	$ 4,607,767
Carrying Amount | Term Loan | Term Loan G
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	0	2,337,169
Carrying Amount | Term Loan | Term Loan B
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,308,824	0
Carrying Amount | Senior Notes | 5.750% Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,300,000	1,300,000
Carrying Amount | Senior Notes | 5.50% Senior Secured Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,050,000	0
Carrying Amount | PIK Note | Senior Convertible PIK Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,272,285	970,506
Carrying Amount | Finance lease obligations
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	71	92
Fair Value
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	4,815,457	4,661,318
Fair Value | Term Loan | Term Loan G
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	0	2,390,720
Fair Value | Term Loan | Term Loan B
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,294,312	0
Fair Value | Senior Notes | 5.750% Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,245,436	1,300,000
Fair Value | Senior Notes | 5.50% Senior Secured Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,029,680	0
Fair Value | PIK Note | Senior Convertible PIK Notes
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	1,245,958	970,506
Fair Value | Finance lease obligations
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Debt instrument, value	$ 71	$ 92