Long-Term Debt (Schedule Of Secured And Unsecured Debt) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Successor [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 8,970	$ 7,777
Successor [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Principal outstanding	8,120
Successor [Member] | Secured Debt [Member] | Term Loan Due 10/8/2027 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 1,457
Interest rate	4.813%
Successor [Member] | Secured Debt [Member] | First Lien Notes Due 10/15/2027 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 1,150
Interest rate	5.875%
Successor [Member] | Secured Debt [Member] | First Lien Notes Due 5/1/2028 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 1,550
Interest rate	5.00%
Successor [Member] | Secured Debt [Member] | First Lien Notes Due 5/12/2030 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 1,200
Interest rate	8.75%
Successor [Member] | Secured Debt [Member] | Second Lien Notes Due 11/1/2029 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 750
Interest rate	5.875%
Successor [Member] | Secured Debt [Member] | Second Lien Notes Due 5/1/2029 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 1,000
Interest rate	6.75%
Successor [Member] | Secured Debt [Member] | Second Lien Notes Due 1/15/2030 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 1,000
Interest rate	6.00%
Successor [Member] | Secured Debt [Member] | IDRB Due 5/1/2030 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 13
Interest rate	6.20%
Successor [Member] | Secured Subsidiary Debt [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 100
Successor [Member] | Secured Subsidiary Debt [Member] | Debentures Due 11/15/2031 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 100
Interest rate	8.50%
Successor [Member] | Unsecured Subsidiary Debt [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 750
Successor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 5/15/2027 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 200
Interest rate	6.75%
Successor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 2/1/2028 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 300
Interest rate	6.86%
Successor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 2/15/2028 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 200
Interest rate	6.73%
Successor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 10/15/2029 [Member]
Debt Instrument [Line Items]
Principal outstanding	$ 50
Interest rate	8.40%
Successor [Member] | Total Debt [Member]
Debt Instrument [Line Items]
Weighted average interest rate	6.163%
Predecessor [Member]
Debt Instrument [Line Items]
Principal outstanding		7,777
Predecessor [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Principal outstanding		6,927
Predecessor [Member] | Secured Debt [Member] | Term Loan Due 10/8/2027 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,464
Interest rate		4.50%
Predecessor [Member] | Secured Debt [Member] | First Lien Notes Due 10/15/2027 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,150
Interest rate		5.875%
Predecessor [Member] | Secured Debt [Member] | First Lien Notes Due 5/1/2028 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,550
Interest rate		5.00%
Predecessor [Member] | Secured Debt [Member] | Second Lien Notes Due 11/1/2029 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 750
Interest rate		5.875%
Predecessor [Member] | Secured Debt [Member] | Second Lien Notes Due 5/1/2029 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,000
Interest rate		6.75%
Predecessor [Member] | Secured Debt [Member] | Second Lien Notes Due 1/15/2030 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,000
Interest rate		6.00%
Predecessor [Member] | Secured Debt [Member] | IDRB Due 5/1/2030 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 13
Interest rate		6.20%
Predecessor [Member] | Secured Subsidiary Debt [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 100
Predecessor [Member] | Secured Subsidiary Debt [Member] | Debentures Due 11/15/2031 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 100
Interest rate		8.50%
Predecessor [Member] | Unsecured Subsidiary Debt [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 750
Predecessor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 5/15/2027 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 200
Interest rate		6.75%
Predecessor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 2/1/2028 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 300
Interest rate		6.86%
Predecessor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 2/15/2028 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 200
Interest rate		6.73%
Predecessor [Member] | Unsecured Subsidiary Debt [Member] | Debentures Due 10/15/2029 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 50
Interest rate		8.40%
Predecessor [Member] | Total Debt [Member]
Debt Instrument [Line Items]
Weighted average interest rate		5.702%