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Supplemental Financial Information (Other Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Deferred revenue	$ 265.8	$ 373.2
Unrecognized tax benefits (inclusive of interest and penalties)	143.8	142.4
Intangible liabilities	21.2	40.7
Supplemental executive retirement plan liabilities	46.3	45.1
Personnel costs	15.3	26.1
Other	34.2	39.8
Other liabilities	$ 526.6	$ 667.3

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Intangible Liabilities Noncurrent

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Supplemental Executive Retirement Plan Liabilities

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Supplemental Financial Information [Abstract]

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The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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The noncurrent portion (due beyond one year or one operating cycle) of other accrued expenses (expenses incurred at the end of the reporting period but not yet paid) not otherwise defined in the taxonomy.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for employer-related costs not otherwise specified in the taxonomy.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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