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REVENUES FROM CONTRACTS - Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract Accounts Receivable	$ 205.0	$ 222.9
Increase (decrease) in accounts receivable	(17.9)
Contract assets	98.3	70.7	$ 0.0
Increase (decrease) in contract with customer, asset, net, current	27.6
Contract Liabilities - current	(88.5)	(86.9)	$ 0.0
Increase (decrease) in contract with customer, liability, current	(1.6)
Contract Liabilities - non-current	(2.1)	0.0
Increase (decrease) in contract with customer, liability, noncurrent	(2.1)
Net contract balance	212.7	$ 206.7
Increase (decrease) in contract with customers, net	$ 6.0

X

- Definition

Contract with Customers, Net

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Increase (Decrease) in Accounts Receivable, Net

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Increase (Decrease) in Contract with Customer, Asset, Net, Current

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For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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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, classified as current.

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

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

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