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