Long-Term Debt and Other Credit Facilities - Summary of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total principal	$ 2,660		$ 2,849
Unamortized deferred finance costs and original issuance discounts	(35)		(29)
Total	2,625		2,820
Less: long-term debt, due within one year	9		9
Long-term debt	$ 2,616		2,811
Secured Notes
Debt Instrument [Line Items]
Interest rate	8.63%
Total principal	$ 1,200		1,200
TLB | Secured Debt
Debt Instrument [Line Items]
Interest rate	8.60%
Total principal	$ 859		866
TLC | Secured Debt
Debt Instrument [Line Items]
Interest rate	8.60%
Total principal	$ 470		470
PEDFA 2009B Bonds | Bonds
Debt Instrument [Line Items]
Interest rate	5.25%	5.25%
Total principal	$ 50	$ 50	50
PEDFA 2009C Bonds | Bonds
Debt Instrument [Line Items]
Interest rate	5.25%	5.25%
Total principal	$ 81	$ 81	81
Cumulus Digital TLF, including PIK | Line of Credit
Debt Instrument [Line Items]
Interest rate	0.00%
Total principal	$ 0		$ 182