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Revenue from Contracts with Customers Schedule of Contract Assets and Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Net	$ 3.0	$ 5.8
Contract with Customer, Liability	82.4	$ 123.1
Contract with Customer, Liability, Increase from Cash Receipts	32.0
Contract with Customer, Liability, Revenue Recognized, Included In Beginning Balance	(57.6)
Contract with Customer, Liability, Revenue Recognized, Added During Period	(15.1)
Contract with Customer, Asset, Reclassified to Receivable	$ (2.8)

X

- Definition

Contract with Customer, Liability, Increase from Cash Receipts

+ References

No definition available.

+ Details

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- Definition

Contract with Customer, Liability, Revenue Recognized, Added During Period

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- Definition

Contract with Customer, Liability, Revenue Recognized, Included In Beginning Balance

+ References

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

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- Definition

Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

+ References

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

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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