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Business Combinations, Separately Recognized Transactions Table (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring and Related Activities [Abstract]
Acquisition-related costs	$ 1.1
Integration expenses	13.1
Acquisition-related costs and integration expenses	14.2
Restructuring and acquisition-related costs	$ 18.3	$ 16.0

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- Definition

Business Combination, Acquisition, Severance & Integration Related Costs

+ References

No definition available.

+ Details

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- Definition

Costs incurred for restructuring initiatives as well as expenses directly related to acquisition activity.

+ References

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460

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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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