Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets [Abstract]

Schedule of Goodwill [Table Text Block]

The changes in the carrying amount of goodwill, for the years ended December 31, 2013 and 2012 are as follows:

(dollars in millions)	Wireline		Wireless		IT Services and Hardware		Data Center Colocation			Total
Balance as of December 31, 2011	$	11.8	$	—	$	2.6	$	276.2		$	290.6
Impairment	—		—		—		—			—
Balance as of December 31, 2012	11.8		—		2.6		276.2			290.6
Goodwill divested from deconsolidation of CyrusOne	—		—		—		(276.2		)	(276.2		)
Balance as of December 31, 2013	$	11.8	$	—	$	2.6	$	—		$	14.4

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

Summarized below are the carrying values for the major classes of intangible assets subject to amortization:

	Weighted-
	Average	December 31, 2013					December 31, 2012
	Life in	Gross Carrying		Accumulated			Gross Carrying		Accumulated
(dollars in millions)	Years	Amount		Amortization			Amount		Amortization
Customer relationships
Wireline	10	$	7.0	$	(6.1	)	$	7.0	(4.9		)
Wireless	9	8.7		(8.5		)	8.7		(8.1		)
IT Services and Hardware	5	2.0		(2.0		)	2.0		(2.0		)
Data Center Colocation	15	—		—			129.5		(36.8		)
		17.7		(16.6		)	147.2		(51.8		)
Trademarks
Wireless	6	6.2		(3.8		)	6.2		(2.8		)
Data Center Colocation	15	—		—			7.4		(1.3		)
		6.2		(3.8		)	13.6		(4.1		)
Favorable leasehold interest
Data Center Colocation	56	—		—			3.9		(0.2		)
		$	23.9	$	(20.4	)	$	164.7	$	(56.1	)

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

The following table presents estimated amortization expense for 2014 through 2018:

(dollars in millions)
2014	$	1.7
2015	1.2
2016	0.6
2017	—
2018	—