Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2015

Restructuring Charges [Abstract]

Schedule of restructuring charges

The following table outlines the amount of restructuring charges recorded within the Consolidated Statements of Income, and the segments they relate to:

Restructuring and Other Charges	Year Ended December 31, 2014
	2015		2014
	(millions of dollars)
Impairment of assets
Performance Materials	$	-	$	0.4
Construction Technologies		-		11.7
Energy Services		33.0		11.6
Corporate		1.2		-
Total impairment of assets charges	$	34.2	$	23.7
Severance and other employee costs
Specialty Minerals	$	-	$	3.0
Refractories		2.0		0.7
Performance Materials		-		5.6
Construction Technologies		-		5.8
Energy Services		9.0		3.7
Total severance and other employee costs	$	11.0	$	18.8
Other
Performance Materials	$	-	$	0.7
Total restructuring and other charges	$	45.2	$	43.2

Reconciliation of restructuring liability

The following table is a reconciliation of our restructuring liability balance:

	(millions of dollars)
Restructuring liability, December 31, 2014	$	14.6
Additional provisions		11.0
Cash payments		(14.0	)
Other adjustments		(3.7	)
Restructuring liability,  December 31, 2015	$	7.9