Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Finite-Lived Intangible Assets [Line Items]

The changes in the Company's goodwill consisted of the following:



	IT Services and Hardware						Entertainment and Communications				Total Company
	December 31, 2018			December 31, 2017			December 31, 2018		December 31, 2017		December 31, 2018			December 31, 2017
(dollars in millions)
Goodwill, beginning balance	$	148.8		$	12.1		$	2.2	$	2.2	$	151.0		$	14.3
Activity during the year
Adjustments to prior year acquisitions	0.7			—			—		—		0.7			—
Acquisitions	—			137.0			8.8		—		8.8			137.0
Currency translations	(3.5		)	(0.3		)	—		—		(3.5		)	(0.3		)
Goodwill, ending balance	$	146.0		$	148.8		$	11.0	$	2.2	$	157.0		$	151.0

Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]

The Company’s intangible assets consisted of the following:



	December 31, 2018							December 31, 2017
	Gross Carrying		Accumulated			Net		Gross Carrying		Accumulated			Net
(dollars in millions)	Amount (a)		Amortization			Amount		Amount (a)		Amortization			Amount
Customer relationships	$	139.4	$	(17.8	)	$	121.6	$	116.0	$	(8.9	)	$	107.1
Trade names	40.7		(2.8		)	37.9		15.9		(0.4		)	15.5
Technology	9.9		(1.3		)	8.6		9.9		(0.2		)	9.7
Total	$	190.0	$	(21.9	)	$	168.1	$	141.8	$	(9.5	)	$	132.3

(a) Change in gross carrying amounts is due to foreign currency translation on intangible assets related to OnX and intangible assets acquired in conjunction with the acquisition of Hawaiian Telcom. See Note 4 for further information.

Finite-Lived Intangible Assets, Tabular Disclosure of Estimated Useful Lives [Table Text Block]

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



Customer relationships	8	to	15	years
Trade names	10	to	15	years
Technology			10	years

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

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



(dollars in millions)
2019	$	14.6
2020	14.3
2021	14.1
2022	13.8
2023	13.5
Thereafter	97.8
Total	$	168.1