Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Right-of-use assets obtained in exchange for lease liabilities	$ 98	$ 221	$ 40
Three Large Managed Service Contracts
Lessee, Lease, Description [Line Items]
Right-of-use assets obtained in exchange for lease liabilities	$ 66
Radio Tower Sites
Lessee, Lease, Description [Line Items]
Right-of-use assets obtained in exchange for lease liabilities		150
TETRA Ireland Communications Limited
Lessee, Lease, Description [Line Items]
Additional leases acquired		$ 34