Note 14. Supplemental Information

The components of "Other operating expense, net" for the three month and nine month periods ended September 30, 2018 and 2017 are as follows.

	For the Three Month Periods Ended September 30,						For the Nine Month Periods Ended September 30,
	2018			2017			2018			2017
Other Operating Expense, Net
Foreign currency transaction (gains) losses, net	$	(0.8	)	$	1.7		$	(0.6	)	$	6.3
Restructuring charges, net ⁽¹⁾		5.4			2.8			5.4			4.9
Environmental remediation expenses⁽²⁾		-			-			-			0.9
Stock-based compensation expense ⁽³⁾		1.1			9.8			2.9			166.0
Shareholder litigation settlement recoveries⁽⁴⁾		-			-			(4.5	)		-
Acquisition related expenses and non-cash charges⁽⁵⁾		0.5			0.7			6.3			2.4
Losses (gains) on asset and business disposals		0.1			(0.6	)		(1.1	)		2.0
Other, net		(0.3	)		3.0			2.4			4.2
Total other operating expense, net	$	6.0		$	17.4		$	10.8		$	186.7

⁽¹⁾

See Note 3 "Restructuring."

⁽²⁾

Estimated environmental remediation costs recorded on an undiscounted basis for a former production facility.

⁽³⁾

Represents stock-based compensation expense recognized for the three month period ended September 30, 2018 of $0.9 million and employer taxes related to stock option exercises of $0.2 million. Represents stock-based compensation expense recognized for the nine month period ended September 30, 2018 of $6.1 million, reduced by $3.2 million primarily due to a decrease in the estimated accrual for employer taxes related to DSUs as a result of the achievement of employer tax caps in counties outside of the United States.

Represents stock-based compensation expense recognized for stock options outstanding of $7.8 million and $69.2 million for the three month and nine month periods ended September 30, 2017 and DSUs granted to employees at the date of the initial public offering of $2.0 million and $96.8 million under the 2013 Stock Incentive Plan for the three and nine month periods ended September 30, 2017.

⁽⁴⁾

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

⁽⁵⁾

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.