Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Represents the amount of working capital acquired at the acquisition date.

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Acquisitions (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 27, 2013 Bluemile, Inc.
Preliminary purchase price and fair value of assets acquired and liabilities assumed
Working capital acquired					$ 0.5
Plant, property and equipment					10.8
Goodwill	496.5	496.5	492.0	12.9	4.5
Intangible assets subject to amortization					5.0
Unearned service revenue					(0.8)
Fair value of assets acquired, net of liabilities assumed					$ 20.0