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Derivative Instruments - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended |
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Oct. 31, 2021 | Jan. 31, 2021
Derivative [Line Items] |  |
Net losses on cash flow hedges estimated to be reclassified into income within the next 12 months | $ 7 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | 91 | $ 175
Cash Flow Hedging | Designated as Hedging Instrument | Foreign Currency Forward Contracts |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 1,400 | $ 1,300
Cash Flow Hedging | Designated as Hedging Instrument | Foreign Currency Forward Contracts | Maximum |  |
Derivative [Line Items] |  |
Derivative, remaining maturity | 49 months |

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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=125515794&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=125515794&loc=SL5579245-113959 + Details
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- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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