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Derivative Financial Instruments Gross Notional Amounts and Fair Values for Currency Derivatives (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Mar. 31, 2020
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Foreign exchange forward contracts to purchase [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Fair value of foreign currency contracts outstanding, Assets | $ 19 | $ 1
Fair value of foreign currency contracts outstanding, Liabilities | 0 | 19
Foreign exchange forward contracts to sell [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Fair value of foreign currency contracts outstanding, Assets | 1 | 61
Fair value of foreign currency contracts outstanding, Liabilities | 69 | 1
Designated as Hedging Instrument [Member] | Foreign exchange forward contracts to purchase [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Notional Amount | 255 | 316
Designated as Hedging Instrument [Member] | Foreign exchange forward contracts to sell [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Notional Amount | 1,135 | 1,371
United States Dollar [Member] | Not Designated as Hedging Instrument [Member] | Foreign exchange forward contracts to purchase [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Notional Amount | 599 | 388
United States Dollar [Member] | Not Designated as Hedging Instrument [Member] | Foreign exchange forward contracts to sell [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Notional Amount | 756 | 292
Balance Sheet Hedging [Member] | Not Designated as Hedging Instrument [Member] | Foreign exchange forward contracts to purchase [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Asset, Current | 1 | 1
Derivative Liability, Current | 1 | 16
Balance Sheet Hedging [Member] | Not Designated as Hedging Instrument [Member] | Foreign exchange forward contracts to sell [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Asset, Current | 1 | 13
Derivative Liability, Current | $ 2 | $ 0

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- Definition Fair value of all asset derivatives designated as cash flow 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 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 + Details
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- Definition Fair value of all liability derivatives designated as cash flow 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 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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