Contingencies (Details) $ in Millions	1 Months Ended	4 Months Ended
	Jul. 31, 2018 USD ($)	Jun. 30, 2015 action
Commitments and Contingencies Disclosure [Abstract]
Number of putative class action complaints filed (over) | action		50
Coopervision Litigation
Loss Contingencies [Line Items]
Litigation settlement amount | $	$ 3.0