Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The Company’s intangible assets consisted of the following:

	March 31, 2023							December 31, 2022
	Gross Carrying		Accumulated			Net		Gross Carrying		Accumulated			Net
(dollars in millions)	Amount		Amortization			Amount		Amount		Amortization			Amount
Intangible assets subject to amortization
Customer relationships	$	862.1	$	(165.2	)	$	696.9	$	862.1	$	(140.7	)	$	721.4
Trade names		109.5		(24.4	)		85.1		109.5		(20.5	)		89.0
Technology		6.0		(1.3	)		4.7		6.0		(1.0	)		5.0
Total		977.6		(190.9	)		786.7		977.6		(162.2	)		815.4
Intangible assets not subject to amortization
FCC licenses and spectrum usage rights		7.0		—			7.0		6.9		—			6.9
Perpetual licenses		6.8		—			6.8		6.8		—			6.8
Total intangible assets	$	991.4	$	(190.9	)	$	800.5	$	991.3	$	(162.2	)	$	829.1

Schedule of Estimated Useful Lives for Finite-lived Intangible Assets

The estimated useful lives for each finite-lived intangible asset class are as follows:

Customer relationships	15 years
Trade names	3 to 10 years
Technology	7 years

Schedule of Estimated Amortization Expense

The annual estimated amortization expense for future years is as follows:

(dollars in millions)
Nine months ended December 31, 2023	$	86.0
2024		105.4
2025		93.6
2026		86.5
2027		79.3
Thereafter		335.9
Total	$	786.7