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3. Fair Value Measurements Foreign Exchange Forward Contracts (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Forward foreign exchange contract to purchase foreign currency [Member]
Derivatives, Fair Value [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	$ 0.4
Derivative, Notional Amount	301.6
Forward foreign exchange contract to sell foreign currency [Member]
Derivatives, Fair Value [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	(0.4)
Derivative, Notional Amount	$ 125.3

X

- 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

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+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

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