Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash equivalents	$ 0	$ 0
Foreign currency option contracts | India, Rupees
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Foreign currency contract, notional amount	157,000,000	180,000,000
Foreign currency option contracts | Korea (South), Won
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Foreign currency contract, notional amount	26,000,000	41,000,000
Foreign currency option contracts | Brazil, Brazil Real
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Foreign currency contract, notional amount	13,000,000	16,000,000
Cross-currency swap
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Foreign currency contract, notional amount	$ 225,000,000		$ 225,000,000
Cash Flow Hedging | Designated as Hedging Instrument | Foreign exchange forward contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Term of foreign exchange forward contract	18 months
Foreign currency contract, notional amount	$ 114,000,000	$ 154,000,000