Contingencies (Details) - Pending Litigation - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2019	Jul. 31, 2018
Ukranian customer
Contingencies
Recovery amount sought		$ 227
Stockholder class action
Contingencies
Time period for lead plaintiff to file a consolidated amended complaint after the court appoints a lead plaintiff	60 days
Time period for the Company to file a response to the consolidated amended complaint	60 days