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Business Acquisitions - Narrative (Details) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
	Jan. 20, 2017	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Change in fair value of contingent consideration			$ (10.2)	$ 0.0	$ 0.0
Conwed
Business Acquisition [Line Items]
Purchase price of acquisition	$ 295.0
Potential earn-out payments	40.0	$ 10.2
Fair value of potential earn-out payments	8.6
Total consideration transferred	303.6
Fair value of the contingent liability			0.0	9.5
Change in fair value of contingent consideration		$ 0.7
Gain recognized in Other income, net			10.2
Fair value of receivables acquired	15.4
Gross contractual amounts receivable	15.8
Inventory	20.6
Financing costs related to the acquisition				0.6
Fair Value Adjustment to Inventory | Conwed
Business Acquisition [Line Items]
Inventory	$ 2.9
Acquisition-related Costs | Conwed
Business Acquisition [Line Items]
Direct and indirect acquisition-related costs			$ 0.0	$ 0.2	$ 1.4

X

- Definition

Business Combination, Financing Costs

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- Definition

Fair value of acquired receivable from business combination, excluding certain loans and debt securities acquired in transfer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Amount of liability recognized arising from contingent consideration in a business combination.

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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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The amount of inventory recognized as of the acquisition date.

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In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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