Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Schedule of differences between U.S. statutory rate and effective rate

The primary differences between the U.S. statutory rate and our effective rate are as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
U.S. statutory rate	35.0	%	35.0	%	35.0	%	35.0	%
Foreign provision	(241.5	)	(10.8	)	2.8		(8.8	)
Change in tax position (1)	—		—		(29.3	)	—
Other	1.6		(0.1	)	(3.3	)	0.5
Effective rate	(204.9	)%	24.1	%	5.2	%	26.7	%

(1) We consider all available evidence, both positive and negative, when determining whether a valuation allowance is required against deferred tax assets. Due to weaker near term outlook and financial results primarily associated with our Robotics segment, we currently do not anticipate generating sufficient foreign source income to fully utilize our foreign tax credits prior to their expiration. We have concluded that it is more likely than not previously recorded deferred tax assets attributable to foreign tax credits will not be realized. As a result of this change in tax position, we recorded a tax charge of $6.3 million in June 2017, which is comprised of a $2.8 million valuation allowance attributable to a foreign tax credit carryforward from 2015 and a $3.5 million charge attributable to the decision to deduct foreign taxes related to 2016 and 2017.