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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Severance Costs		$ 1.2
Restructuring Reserve [Roll Forward]
Beginning balance	17.6	12.3	15.8		15.8
Charges	9.0	6.4	0	0	15.4	10.8
Utilizations	(3.2)	(1.1)	(3.5)
Ending balance	23.4	17.6	12.3		23.4
Restructuring liabilities included in other current liabilities	21.5				21.5		7.8
Restructuring liabilities included in other noncurrent liabilities	1.9				1.9		8.0
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	10.3	7.1	9.7		9.7
Charges	0.7	3.5	0
Utilizations	(2.5)	(0.3)	(2.6)
Ending balance	8.5	10.3	7.1		8.5
Lease Abandonment [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	4.3	5.1	6.0		6.0
Charges	(1.3)	0	0
Utilizations	(0.6)	(0.8)	(0.9)
Ending balance	2.4	4.3	5.1		2.4
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	3.0	0.1	0.1		0.1
Charges	9.6	2.9	0
Utilizations	(0.1)	0	0
Ending balance	12.5	3.0	0.1		12.5
Wireline [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	9.2	8.7	10.5		10.5
Charges	(1.3)	1.1	0
Utilizations	(2.3)	(0.6)	(1.8)
Ending balance	5.6	9.2	8.7		5.6
IT Services and Hardware [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0.7	0.8	0.8		0.8
Charges	0	0	0
Utilizations	(0.1)	(0.1)	0
Ending balance	0.6	0.7	0.8		0.6
Wireless [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	6.1	1.2	1.5		1.5
Charges	10.3	5.2	0
Utilizations	(0.4)	(0.3)	(0.3)
Ending balance	16.0	6.1	1.2		16.0
Wireless [Member] \| Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Charges					3.0
Wireless [Member] \| Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Charges	9.6	2.9
Corporate [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	1.6	1.6	3.0		3.0
Charges	0	0.1	0
Utilizations	(0.4)	(0.1)	(1.4)
Ending balance	$ 1.2	$ 1.6	$ 1.6		$ 1.2