Segment Results (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Segment	Jun. 30, 2017 USD ($)
Segment Results [Abstract]
Number of reportable segments | Segment				3
Segment Reporting [Abstract]
Revenue		$ 668.2	$ 579.1	$ 1,287.7	$ 1,060.8
Less items to reconcile Segment Adjusted EBITDA to Income (Loss) Before Income Taxes [Abstract]
Interest expense		26.1	39.5	52.1	85.3
Restructuring and related business transformation costs		8.4	5.6	12.9	14.2
Acquisition related expenses and non-cash charges	[1]	2.9	1.0	5.9	1.8
Stock-based compensation				5.2	156.2
Foreign currency transaction (gains) losses, net		2.4	(4.0)	(0.2)	(4.7)
Loss on extinguishment of debt		0.2	50.4	0.2	50.4
Shareholder litigation settlement recoveries	[2]	0.0	0.0	(4.5)	0.0
Income (Loss) Before Income Taxes		77.5	(190.2)	143.4	(198.8)
Insurance recoveries of legal defense costs				5.6
Restructuring and Related Business Transformation Costs [Abstract]
Restructuring charges	[3]	0.0	0.4	0.0	2.1
Severance, sign-on, relocation and executive search costs		1.9	0.6	3.9	1.6
Facility reorganization, relocation and other costs		0.7	1.8	1.3	2.9
Information technology infrastructure transformation		0.2	2.0	0.2	2.7
(Gains) losses on asset and business disposals		0.0	(0.5)	(1.2)	2.5
Consultant and other advisor fees		4.0	0.8	6.6	1.2
Other, net		1.6	0.5	2.1	1.2
Total restructuring and related business transformation costs		8.4	5.6	12.9	14.2
Stock-based compensation expense recognized		1.8	61.4	5.2	61.4
Decrease in stock-based compensation expense to DSU's		2.6		3.3
Stock Options [Member]
Restructuring and Related Business Transformation Costs [Abstract]
Stock-based compensation expense recognized			61.4		61.4
Deferred Stock Units [Member]
Restructuring and Related Business Transformation Costs [Abstract]
Stock-based compensation expense recognized			94.8		94.8
Industrials [Member]
Segment Reporting [Abstract]
Revenue		328.7		645.6
Energy [Member]
Segment Reporting [Abstract]
Revenue		273.1		515.3
Medical [Member]
Segment Reporting [Abstract]
Revenue		66.4		126.8
Operating Segments [Member]
Segment Reporting [Abstract]
Adjusted EBITDA		168.8	141.0	319.4	241.3
Operating Segments [Member] | Industrials [Member]
Segment Reporting [Abstract]
Revenue		328.7	282.8	645.6	530.8
Adjusted EBITDA		71.1	63.4	137.9	110.6
Operating Segments [Member] | Energy [Member]
Segment Reporting [Abstract]
Revenue		273.1	239.5	515.3	417.7
Adjusted EBITDA		79.7	62.2	147.6	100.6
Operating Segments [Member] | Medical [Member]
Segment Reporting [Abstract]
Revenue		66.4	56.8	126.8	112.3
Adjusted EBITDA		18.0	15.4	33.9	30.1
Corporate [Member]
Less items to reconcile Segment Adjusted EBITDA to Income (Loss) Before Income Taxes [Abstract]
Corporate expenses not allocated to segments	[4],[5]	7.2	8.9	9.6	17.1
Segment Reconciling Items [Member]
Less items to reconcile Segment Adjusted EBITDA to Income (Loss) Before Income Taxes [Abstract]
Interest expense	[5]	26.1	39.5	52.1	85.3
Depreciation and amortization expenses	[5]	45.3	43.8	90.2	83.5
Sponsor fees and expenses	[5],[6]	0.0	16.2	0.0	17.3
Restructuring and related business transformation costs	[5],[7]	8.4	5.6	12.9	14.2
Acquisition related expenses and non-cash charges	[1],[5]	5.7	1.2	10.3	1.9
Environmental remediation loss reserve	[5],[8]	0.0	(0.1)	0.0	0.9
Expenses related to public stock offerings	[5],[9]	0.5	1.8	1.9	3.2
Establish public company financial reporting compliance	[5],[10]	1.1	2.1	1.9	3.3
Stock-based compensation	[5],[11]	(0.8)	156.2	1.9	156.2
Foreign currency transaction (gains) losses, net	[5]	(2.4)	4.0	0.2	4.7	[12]
Loss on extinguishment of debt	[5],[13]	0.2	50.4	0.2	50.4
Shareholder litigation settlement recoveries	[5],[12]	0.0	0.0	(4.5)	0.0
Other adjustments	[5],[14]	0.0	1.6	(0.7)	2.1
Restructuring and Related Business Transformation Costs [Abstract]
Total restructuring and related business transformation costs	[5],[7]	$ 8.4	$ 5.6	$ 12.9	$ 14.2

[1] Represents costs associated with successful and/or abandoned acquisitions, including third-party expenses, post-closure integration costs and non-cash charges and credits arising from fair value purchase accounting adjustments.

[2] Represents an insurance recovery of the Company' shareholder litigation settlement in 2014.

[3] See Note 3 "Restructuring."

[4] Includes insurance recoveries of asbestos legal fees of $5.6 million in the six month period ended June 30, 2018.

[5] The reconciling items for the three month and six month periods ended June 30, 2017 have been reclassified to conform to the methodology used in the three and six month periods ended June 30, 2018, and include the following.

[6] Represents management fees and expenses paid to the Company's Sponsor.

[7] Restructuring and related business transformation costs consist of the following.

[8] Represents estimated environmental remediation costs and losses relating to a former production facility.

[9] Represents expenses related to the Company's initial public offering and subsequent secondary offerings.

[10] Represents third party expenses to comply with the requirements of Sarbanes-Oxley in 2018 and the accelerated adoption of the new revenue recognition standard (ASC 606 - Revenue from Contracts with Customers) in the first quarter of 2018, one year ahead of the required adoption date for a private company. These expenses were previously included in "Expenses related to initial stock offering" and prior periods have been restated to conform to current period presentation.

[11] Represents stock-based compensation expense recognized for the three month and six month periods ended June 30, 2018 of $1.8 million and $5.2 million, respectively, reduced by a ($2.6 million) and ($3.3 million) decrease in the estimated accrual for employer taxes for the three month and six month periods ended June 30, 2018, respectively, as a result of the achievement of employer tax caps in countries outside of the United States. Represents stock-based compensation expense recognized for stock options outstanding of$61.4 million and DSUs granted to employees at the date of the initial public offering of $94.8 million under the 2013 Stock Incentive Plan for the three and six month periods ended June 30, 2017.

[12] Represents an insurance recovery of the Company's shareholder litigation settlement in 2014.

[13] Represents losses on extinguishment of the senior notes and a portion of the U.S. term loan.

[14] Includes (i) the effects of the amortization of prior service costs and the amortization of gains in pension and other postretirement benefits (OPEB) expense, (ii) certain legal and compliance costs and (iii) other miscellaneous adjustments.