Long-Term Debt and Credit Facilities - Amended and Restated Credit Agreement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Amended Credit Agreement | Minimum | Base Rate
Long-term Debt and Credit Facilities
Basis spread (as a percent)	1.50%
Amended Credit Agreement | Minimum | Eurodollar
Long-term Debt and Credit Facilities
Basis spread (as a percent)	0.50%
Amended Credit Agreement | Maximum | Base Rate
Long-term Debt and Credit Facilities
Basis spread (as a percent)	2.25%
Amended Credit Agreement | Maximum | Eurodollar
Long-term Debt and Credit Facilities
Basis spread (as a percent)	1.25%
Credit Facility | Senior Secured Revolving Credit Facility
Long-term Debt and Credit Facilities
Long-term debt, gross	$ 2,200
Credit Facility | Revolving Credit Facility
Long-term Debt and Credit Facilities
Long-term debt, gross	0	$ 200
Credit Facility | Revolving Credit Facility | CenturyLink Escrow, LLC | Swingline Loan
Long-term Debt and Credit Facilities
Maximum borrowing capacity	250
Credit Facility | Revolving Credit Facility | CenturyLink Escrow, LLC | Letter of Credit
Long-term Debt and Credit Facilities
Maximum borrowing capacity	800
Term Loan | Term Loan A
Long-term Debt and Credit Facilities
Long-term debt, gross	991	1,050
Term Loan | Term Loan A-1
Long-term Debt and Credit Facilities
Long-term debt, gross	283	300
Term Loan | Term Loan B
Long-term Debt and Credit Facilities
Long-term debt, gross	$ 3,941	$ 4,900
Term Loan | Amended Credit Agreement, Term Loan B | Base Rate
Long-term Debt and Credit Facilities
Basis spread (as a percent)	1.25%
Term Loan | Amended Credit Agreement, Term Loan B | Eurodollar
Long-term Debt and Credit Facilities
Basis spread (as a percent)	2.25%