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Hedging Activities - Schedule of Information Regarding Fair Value of Derivatives on a Gross Basis (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
Derivatives designated for hedge accounting
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	$ 108	$ 29
Fair value of derivative liability, gross fair value	51	229
Derivatives not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	0	0
Fair value of derivative liability, gross fair value	0	0
Currency Swap | Derivatives designated for hedge accounting | Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	0	0
Derivative liability, notional amount	0	504
Currency Swap | Derivatives designated for hedge accounting | Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	91	0
Currency Swap | Derivatives designated for hedge accounting | Other Noncurrent Assets/Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability, gross fair value	33	222
Derivative liability, notional amount	5,283	3,508
Currency Swap | Derivatives designated for hedge accounting | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability, gross fair value	18	7
Foreign Exchange Contract | Derivatives designated for hedge accounting | Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	17	15
Fair value of derivative liability, gross fair value	0	0
Derivative asset, notional amount	81	81
Foreign Exchange Contract | Derivatives designated for hedge accounting | Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	0	14
Fair value of derivative liability, gross fair value	0	0
Derivative asset, notional amount	0	81
Foreign Exchange Contract | Derivatives not designated for hedge accounting | Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	0	0
Fair value of derivative liability, gross fair value	0	0
Derivative asset, notional amount	14	13
Foreign Exchange Contract | Derivatives not designated for hedge accounting | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	0	0
Fair value of derivative liability, gross fair value	0	0
Derivative liability, notional amount	$ 14	$ 16

X

- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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Nominal or face amount used to calculate payments on the derivative liability.

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No definition available.

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