Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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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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Fair value portion of investments accounted under the cost method.

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This item represents the gain (loss) realized during the period from the sale of investments accounted for under the cost method of accounting and any losses recognized thereon for impairments of other than a temporary nature.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

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Significant Accounting Policies [Line Items]

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SIGNIFICANT ACCOUNTING POLICIES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Deferred revenue	$ 21.9
Reclassification on adoption of ASU			$ 0.0
DIO Corporation
Significant Accounting Policies [Line Items]
Proceeds from sale of direct investment	54.1
Gain realized on cost-method investment	44.1
Unrealized gain in accumulated other comprehensive income		$ 45.0
Fair value of direct investment		54.4
Trade Accounts Receivable
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts and trade discounts	$ 25.0	22.4
ASU 2018-02
Significant Accounting Policies [Line Items]
Reclassification on adoption of ASU		7.6
AOCI including portion attributable to noncontrolling interest \| ASU 2018-02
Significant Accounting Policies [Line Items]
Reclassification on adoption of ASU		(7.6)
Retained Earnings
Significant Accounting Policies [Line Items]
Reclassification on adoption of ASU			$ (1.0)
Retained Earnings \| ASU 2018-02
Significant Accounting Policies [Line Items]
Reclassification on adoption of ASU		$ 7.6