Long-Term Debt - Exchanges and Issuances (Details) - USD ($) $ in Millions	Dec. 31, 2024	Nov. 30, 2024	Mar. 31, 2024
Debt Instrument [Line Items]
Aggregate principal amount			$ 7,548
Term Loan | Term Loan B-1 And B-2
Debt Instrument [Line Items]
Aggregate principal amount			$ 2,398
Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 357	$ 324
Senior Notes | 4.625% Senior Notes Due 2027
Debt Instrument [Line Items]
Stated interest rate	4.625%	4.625%
Aggregate principal amount	$ 280	$ 48
Senior Notes | 3.875% Senior Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate	3.875%
Senior Notes | 4.250% Senior Notes Due 2028
Debt Instrument [Line Items]
Stated interest rate	4.25%	4.25%
Aggregate principal amount		$ 275
Senior Notes | 3.625% Senior Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate	3.625%
Senior Notes | 3.750% Senior Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate	3.75%
Senior Notes | 10.500% First Lien Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			10.50%
Aggregate principal amount			$ 668
Senior Notes | 4.875% First Lien Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			4.875%
Aggregate principal amount			$ 606
Senior Notes | 10.750% First Lien Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			10.75%
Aggregate principal amount			$ 678
Senior Notes | 4.500% Second Lien Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			4.50%
Aggregate principal amount			$ 712
Senior Notes | 3.875% Second Lien Notes Due 2030
Debt Instrument [Line Items]
Stated interest rate			3.875%
Aggregate principal amount			$ 458
Senior Notes | 4.000% Second Lien Notes Due 2031
Debt Instrument [Line Items]
Stated interest rate			4.00%
Aggregate principal amount			$ 453
Senior Notes | 11.000% First Lien Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			11.00%
Aggregate principal amount			$ 1,575
Senior Notes | 3.400% Senior Notes Due 2027
Debt Instrument [Line Items]
Stated interest rate			3.40%
Senior Notes | 4.625% Senior Notes Due 2027
Debt Instrument [Line Items]
Stated interest rate			4.625%
Senior Notes | 3.875% Senior Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			3.875%
Senior Notes | 4.250% Senior Notes Due 2028
Debt Instrument [Line Items]
Stated interest rate			4.25%
Senior Notes | 3.625% Senior Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			3.625%
Senior Notes | 3.750% Senior Notes Due 2029
Debt Instrument [Line Items]
Stated interest rate			3.75%