Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The Company’s intangible assets consisted of the following:

	June 30, 2024							December 31, 2023
	Gross Carrying		Accumulated			Net		Gross Carrying		Accumulated			Net
(dollars in millions)	Amount		Amortization			Amount		Amount		Amortization			Amount
Intangible assets subject to amortization
Customer relationships	$	545.0	$	(179.4	)	$	365.6	$	545.0	$	(150.6	)	$	394.4
Trade names		22.4		(19.4	)		3.0		22.4		(15.8	)		6.6
Technology		1.1		(0.3	)		0.8		1.1		(0.3	)		0.8
Total		568.5		(199.1	)		369.4		568.5		(166.7	)		401.8
Intangible assets not subject to amortization
FCC licenses and spectrum usage rights		7.2		—			7.2		7.1		—			7.1
Perpetual licenses		6.8		—			6.8		6.8		—			6.8
Total intangible assets	$	582.5	$	(199.1	)	$	383.4	$	582.4	$	(166.7	)	$	415.7

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)
Six months ended June 30, 2024	$	30.1
2025		53.5
2026		48.9
2027		44.4
2028		39.8
Thereafter		152.7
Total	$	369.4