Defined benefit plan (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The expense components of the Swiss Plan consisted of the following:

	Three Months Ended March 31, 2019
Net service cost	$	0.3
Expected return on plan assets, net of expenses	(0.1		)
Total	$	0.2