Restructuring Liability (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	3 Months Ended
Sep. 30, 2014	Sep. 30, 2014 Employee severance and termination [Member]	Sep. 30, 2014 Office closures [Member]	Sep. 30, 2014 Contract termination and other [Member]	Mar. 31, 2014 Telenet [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability as of January 1, 2014	$ 113.5	$ 26.6	$ 14.9	$ 72.0
Restructuring charges	137.4	34.5	9.3	93.6	86.1
Cash paid	(83.6)	(44.9)	(10.2)	(28.5)
Foreign currency translation adjustments and other	(14.9)	0.6	(0.5)	(15.0)
Restructuring liability as of September 30, 2014	152.4	16.8	13.5	122.1
Current portion	49.6	16.7	12.1	20.8
Noncurrent portion	102.8	0.1	1.4	101.3
Total	$ 152.4	$ 16.8	$ 13.5	$ 122.1

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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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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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal 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, 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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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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Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost.

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