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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amounts (Details) - Derivatives designated as cash flow hedges - Derivatives designated as cash flow hedges - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
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Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 64,000,000 | $ 49,000,000
Foreign currency option contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 16,000,000 | 28,000,000
Interest rate swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 900,000,000 | 900,000,000
Forward-starting interest rate swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 475,000,000 | $ 475,000,000

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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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