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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
Beginning balance	$ 4.9us-gaap_RestructuringReserve
Charges	3.4us-gaap_RestructuringCharges	0us-gaap_RestructuringCharges
Utilizations	(4.5)us-gaap_PaymentsForRestructuring
Ending balance	3.8us-gaap_RestructuringReserve
Restructuring liabilities included in other current liabilities	3.5us-gaap_RestructuringReserveCurrent		4.9us-gaap_RestructuringReserveCurrent
Restructuring liabilities included in other noncurrent liabilities	0.3us-gaap_RestructuringReserveNoncurrent
Wireline [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	3.9
Charges	0.8
Utilizations	(3.2)
Ending balance	1.5
IT Services and Hardware [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0.3
Charges	2.2
Utilizations	(0.8)
Ending balance	1.7
Corporate [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0.7
Charges	0.4
Utilizations	(0.5)
Ending balance	0.6
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	3.0
Charges	2.2
Utilizations	(3.1)
Ending balance	2.1
Lease Abandonment [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	1.8
Charges	0
Utilizations	(0.2)
Ending balance	1.6
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0.1
Charges	1.2
Utilizations	(1.2)
Ending balance	$ 0.1