Discontinued Operations (Tables) - Discontinued Operations [Member]

12 Months Ended

Dec. 31, 2016

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Disposal Groups, Including Discontinued Operations [Table Text Block]

Wireless financial results for the twelve months ended December 31, 2016, 2015 and 2014 reported as "Income (loss) from discontinued operations, net of tax" on the Consolidated Statements of Operations are as follows:

	Twelve Months Ended
	December 31,
(dollars in millions)	2016			2015			2014
Revenue	$	—		$	4.4		$	132.8
Costs and expenses
Cost of products and services	—			12.0			66.9
Selling, general and administrative	—			2.2			19.5
Depreciation and amortization expense	—			28.6			103.4
Restructuring charges	—			3.3			16.3
Impairment of assets	—			—			7.5
Transaction costs	—			—			3.2
Gain on sale or disposal of assets	—			(0.4		)	—
Amortization of deferred gain	—			(6.5		)	(22.9		)
Total operating costs and expenses	—			39.2			193.9
Operating loss	—			(34.8		)	(61.1		)
Interest (income) expense	—			(1.7		)	2.8
Other (income) expense	(0.3		)	(2.3		)	2.2
Gain on transfer of tower lease obligations and other assets	—			15.9			—
Gain on sale of wireless spectrum licenses	—			112.6			—
Income (loss) before income taxes	0.3			97.7			(66.1		)
Income tax expense (benefit)	—			34.8			(24.0		)
Income (loss) from discontinued operations, net of tax	$	0.3		$	62.9		$	(42.1	)

Condensed Balance Sheet [Table Text Block]

Wireless liabilities presented as discontinued operations as of December 31, 2016 and December 31, 2015 are as follows:

(dollars in millions)	December 31, 2016		December 31, 2015
Current liabilities
Restructuring liability	$	—	$	4.7
Other current liabilities	—		0.7
Total current liabilities from discontinued operations	$	—	$	5.4

Condensed Cash Flow Statement [Table Text Block]

Following is selected operating, investing and financing cash flow activity from discontinued operations included in Consolidated Statements of Cash Flows:

	Twelve Months Ended
	December 31,
(dollars in millions)	2016			2015			2014
Depreciation and amortization	$	—		$	28.6		$	103.4
Gain on sale of assets	—			(0.4		)	—
Impairment of assets	—			—			7.5
Deferred gain on sale of spectrum licenses	—			(112.6		)	—
Amortization of deferred gain on sale of towers	—			(6.5		)	(22.9		)
Gain on transfer of tower lease obligations and other assets	—			(15.9		)	—
Non-cash spectrum lease	—			3.2			3.2
Restructuring payments	(4.4		)	(14.5		)	(2.4		)
Capital expenditures	—			—			(6.5		)
Proceeds from sale of wireless spectrum licenses	—			—			194.4
Repayment of debt	—			(0.3		)	(23.5		)