Long-Term Debt - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Long-term debt
Debt instrument, face amount	$ 7,548
Decrease in total consolidated debt	3,700
Lender fees paid	209
Third party costs paid	112
Capitalized lender fees	52
Capitalized third party costs	51
Reduction in debt resulting from extinguishment of debt	261
Gain on extinguishment of debt	$ 54	$ 0
Redemption price, percentage	101.00%
Prepaid on or prior to the 12-month anniversary of the effective date
Long-term debt
Prepayment premium, rate	2.00%
Prepaid after the 12-month anniversary and on or prior to the 24-month anniversary of the effective date
Long-term debt
Prepayment premium, rate	1.00%
Financial Guarantee
Long-term debt
Maximum guaranteed amount	$ 150
SOFR
Long-term debt
Interest rate floor	2.00%
Basis spread on variable rate (as a percent)	6.56%
Base Rate
Long-term debt
Basis spread on variable rate (as a percent)	5.56%
Gain (Loss) on Extinguishment of Debt
Long-term debt
Lender fees recognized as expense	$ 157
Operating Expense
Long-term debt
Third party costs expensed	61
10.500% Senior Secured Notes Due 2030 | Senior notes
Long-term debt
Stated interest rate			10.50%
Former Facility | Term loan
Long-term debt
Amount outstanding	$ 12		$ 2,411
Former Facility | Term loan | SOFR
Long-term debt
Basis spread on variable rate (as a percent)	1.75%
Term Loan B-1 | Term loan
Long-term debt
Debt instrument, face amount	$ 1,200
Amount outstanding	$ 1,199		0
Term Loan B-1 | Term loan | SOFR
Long-term debt
Basis spread on variable rate (as a percent)	6.56%
Term Loan B-2 | Term loan
Long-term debt
Debt instrument, face amount	$ 1,200
Amount outstanding	$ 1,199		0
Term Loan B-2 | Term loan | SOFR
Long-term debt
Basis spread on variable rate (as a percent)	6.56%
First Lien Notes | Senior notes
Long-term debt
Amount outstanding	$ 3,846		$ 925
10.750% First Lien Notes Due 2029 | Senior notes
Long-term debt
Debt instrument, face amount	678
Proceeds from issuance of debt	$ 1,325
Stated interest rate	10.75%
Noncash fee	$ 50
4.00% Senior Secured Notes | Senior notes | Lumen Technologies, Inc.
Long-term debt
Debt instrument, face amount	200
11.000% First Lien Notes Due 2029 | Senior notes
Long-term debt
Debt instrument, face amount	$ 1,575
Stated interest rate	11.00%