Restructuring Activities (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Schedule of Summary of Severance and Other Restructuring Costs

The following table is a summary of the severance and other restructuring costs, which included employee-related costs, facility rent and exit costs, relocation, recruiting, travel and other, for the years ended December 31, 2018, 2017 and 2016:

	Year Ended December 31,
	2018		2017		2016
Severance:
Cost of sales	$	—	$	0.4	$	3.3
Selling, general, and administrative expenses	3.2		3.2		5.3
Total severance costs	$	3.2	$	3.6	$	8.6
Other restructuring:
Cost of sales	$	0.8	$	2.3	$	0.2
Selling, general, and administrative expenses	0.4		5.3		0.7
Total other restructuring costs	$	1.2	$	7.6	$	0.9
Total restructuring costs	$	4.4	$	11.2	$	9.5

Schedule of Restructuring Activity by Type

The following tables summarize our restructuring activities for the years ended 2018, 2017 and 2016:

	Year Ended December 31, 2018
	Energy & Chemicals			D&S West			D&S East			Corporate			Consolidated
Balance as of December 31, 2017	$	0.2		$	1.2		$	0.2		$	1.1		$	2.7
Restructuring charges	0.7			—			1.4			2.3			4.4
Cash payments and other	(0.9		)	(1.2		)	(0.8		)	(3.3		)	(6.2		)
Balance as of December 31, 2018	$	—		$	—		$	0.8		$	0.1		$	0.9

	Year Ended December 31, 2017
	Energy & Chemicals			D&S West			D&S East			Corporate			Consolidated
Balance as of December 31, 2016	$	0.1		$	3.2		$	—		$	3.0		$	6.3
Restructuring charges	2.4			1.1			1.7			6.0			11.2
Cash payments and other	(2.5		)	(3.1		)	(1.5		)	(7.9		)	(15.0		)
Acquired restructuring reserve	0.2			—			—			—			0.2
Balance as of December 31, 2017	$	0.2		$	1.2		$	0.2		$	1.1		$	2.7

	Year Ended December 31, 2016
	Energy & Chemicals			D&S West			D&S East			Corporate			Consolidated
Balance as of December 31, 2015	$	1.1		$	0.4		$	0.2		$	0.9		$	2.6
Restructuring charges	1.0			3.5			0.8			4.2			9.5
Cash payments and other	(2.0		)	(0.7		)	(1.0		)	(2.1		)	(5.8		)
Balance as of December 31, 2016	$	0.1		$	3.2		$	—		$	3.0		$	6.3