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Derivatives - Forward Notional Contracts (Details) - Foreign currency forward contracts $ in Millions | Sep. 30, 2021 USD ($) DerivativeInstrument | Dec. 31, 2020 USD ($)
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Designated as hedging instrument | Derivatives designated as cash flow hedges |  |
Derivative [Line Items] |  |
Average number of contracts entered into per month | DerivativeInstrument | 150 |
Aggregate notional amount of derivative | $ | $ 124.0 | $ 168.2
Not designated as hedging instrument | Fair Value Hedging |  |
Derivative [Line Items] |  |
Average number of contracts entered into per month | DerivativeInstrument | 20 |
Aggregate notional amount of derivative | $ | $ 92.1 | $ 74.8

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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