Derivative Financial Instruments Gross Notional Amounts and Fair Values for Currency Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2024	Mar. 31, 2024
Forward contracts to purchase
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of foreign currency contracts outstanding, Assets	$ 5	$ 1
Fair value of foreign currency contracts outstanding, Liabilities	0	4
Forward contracts to sell
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of foreign currency contracts outstanding, Assets	2	24
Fair value of foreign currency contracts outstanding, Liabilities	59	11
Designated as Hedging Instrument \| Forward contracts to purchase
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	305	413
Designated as Hedging Instrument \| Forward contracts to sell
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,929	2,329
United States Dollar \| Not Designated as Hedging Instrument \| Forward contracts to purchase
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	670	452
United States Dollar \| Not Designated as Hedging Instrument \| Forward contracts to sell
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	977	419
Balance Sheet Hedging \| Not Designated as Hedging Instrument \| Forward contracts to purchase
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Current	9	0
Derivative Liability, Current	0	5
Balance Sheet Hedging \| Not Designated as Hedging Instrument \| Forward contracts to sell
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Current	0	4
Derivative Liability, Current	$ 14	$ 0

Fair value of all asset derivatives designated as cash flow hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B

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- Definition

Fair value of all liability derivatives designated as cash flow hedging instruments.

+ References

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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://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

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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.

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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

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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
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

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