Contract Asset and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customers [Abstract]
Receivables, Net, Current	$ 966.5	$ 1,035.9
Deferred revenue, current	44.3	34.1
Deferred revenue, noncurrent	77.6	$ 78.8
Increase (Decrease) in Receivables	(69.4)
Contract Liability Increase (Decrease), Current	10.2
Contract Liabilities Increase (Decrease), Noncurrent, Net of Contract Liabilities Amortized into Revenue	(1.2)
Deferred revenue, additions	56.9
Contract with Customer, Liability, Revenue Recognized	$ 47.9

Contract Liabilities Increase (Decrease), Noncurrent, Net of Contract Liabilities Amortized into Revenue

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- Definition

Contract Liability Increase (Decrease), Current

+ References

No definition available.

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- Definition

Revenue from Contract with Customers [Abstract]

+ References

No definition available.

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
-Paragraph 8
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- Definition

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. 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.

+ References

No definition available.

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- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References

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-Publisher FASB
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- Definition

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.

+ References

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- Definition

The increase (decrease) during the reporting period in the total amount due within one year (or one operating cycle) from all parties, associated with underlying transactions that are classified as operating activities.

+ References

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- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

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