Acquisitions - WEST (Details) - Water & Energy Systems Technology [Member] - USD ($) $ in Millions			1 Months Ended	6 Months Ended
		Oct. 11, 2016	Oct. 31, 2016	Jun. 30, 2017
Business Acquisition [Line Items]
Percentage of Voting Interests Acquired		100.00%
Name of Acquired Entity		Water & Energy Systems Technology of Nevada, Inc.
Total Consideration			$ 6.7
Payments to Acquire Business			5.9
Working Capital Adjustments				$ 0.2
Payments Due in April 2018			$ 0.6
Assets Acquired [Abstract]
Cash and Cash Equivalents		$ 0.1
Other Current Assets		1.0
Intangible Assets	[1]	2.8
Goodwill	[1],[2]	4.2
Other Non-Current Assets		0.1
Total Assets Acquired		8.2
Liabilities Assumed [Abstract]
Current Liabilities		0.3
Non-Current Liabilities		1.2
Total Liabilities Assumed		1.5
Net Identifiable Assets Acquired		6.7
Tax Deductible Goodwill		$ 0.0

[1] Presented within Goodwill and Intangible Assets – Net on the Consolidated Balance Sheet. (See Note 7. Goodwill and Intangible Assets.)

[2] For tax purposes, the purchase price allocation resulted in no allocation to goodwill.