Business Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Our business segment information is as follows:

	Year Ended December 31,
(dollars in millions)	2014			2013			2012
Revenue
Wireline	$	740.7		$	724.8		$	730.5
IT Services and Hardware	433.0			344.1			315.7
Wireless	132.8			201.5			241.8
Data Center Colocation	—			15.6			221.3
Intersegment	(28.3		)	(29.1		)	(35.4		)
Total revenue	$	1,278.2		$	1,256.9		$	1,473.9
Intersegment revenue
Wireline	$	15.6		$	16.8		$	19.1
IT Services and Hardware	11.0			9.6			7.6
Wireless	1.7			2.3			2.3
Data Center Colocation	—			0.4			6.4
Total intersegment revenue	$	28.3		$	29.1		$	35.4
Operating income (loss)
Wireline	$	182.5		$	190.2		$	212.9
IT Services and Hardware	19.8			8.5			10.3
Wireless	(66.3		)	18.2			51.2
Data Center Colocation	—			3.2			30.4
Corporate	(20.2		)	(56.3		)	(34.7		)
Total operating income	$	115.8		$	163.8		$	270.1
Expenditures for long-lived assets
Wireline	$	163.7		$	162.6		$	114.2
IT Services and Hardware	11.9			10.6			9.0
Wireless	6.5			16.0			15.8
Data Center Colocation	—			7.7			228.2
Corporate	0.2			—			—
Total expenditures for long-lived assets	$	182.3		$	196.9		$	367.2
Depreciation and amortization
Wireline	$	115.7		$	112.2		$	106.0
IT Services and Hardware	11.7			10.5			8.6
Wireless	103.4			41.2			31.9
Data Center Colocation	—			5.2			70.6
Corporate	0.2			0.5			0.3
Total depreciation and amortization	$	231.0		$	169.6		$	217.4
	As of December 31,
(dollars in millions)	2014			2013
Assets
Wireline	$	832.2		$	780.8
IT Services and Hardware	61.4			48.9
Wireless	122.7			247.5
Corporate and eliminations	803.4			1,030.1
Total assets	$	1,819.7		$	2,107.3

Revenue from External Customers by Products and Services [Table Text Block]

Details of our service and product revenues including eliminations are as follows:

	Year Ended December 31,
(dollars in millions)	2014		2013		2012
Service revenue
Wireline	$	714.5	$	702.3	$	705.0
IT Services and Hardware	161.4		138.7		130.2
Wireless	123.7		183.1		222.7
Data Center Colocation	—		15.2		214.9
Total service revenue	$	999.6	$	1,039.3	$	1,272.8
Product revenue
Handsets and accessories	$	18.0	$	21.8	$	23.2
IT, telephony and other equipment	260.6		195.8		177.9
Total product revenue	$	278.6	$	217.6	$	201.1