Hedging Activities - Schedule of Information Regarding Fair Value of Derivatives on a Gross Basis (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Derivatives designated for hedge accounting
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	$ 294	$ 108
Fair value of derivative liability, gross fair value	19	51
Derivatives not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	2	0
Fair value of derivative liability, gross fair value	0	0
Foreign Exchange Contract \| Derivatives designated for hedge accounting
Derivatives, Fair Value [Line Items]
Derivative asset, notional amount	0
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	0	17
Fair value of derivative liability, gross fair value	0	0
Derivative asset, notional amount		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	2	0
Fair value of derivative liability, gross fair value	0	0
Derivative asset, notional amount	24	14
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	5	14
Currency Swap \| Derivatives designated for hedge accounting \| Prepaid expenses and other
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	112	0
Currency Swap \| Derivatives designated for hedge accounting \| Other accrued liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability, gross fair value	19	18
Currency Swap \| Derivatives designated for hedge accounting \| Prepaid expenses and other/Other accrued liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	1,279	0
Currency Swap \| Derivatives designated for hedge accounting \| Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative asset, gross fair value	182	91
Currency Swap \| Derivatives designated for hedge accounting \| Other Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative liability, gross fair value	0	33
Currency Swap \| Derivatives designated for hedge accounting \| Other Noncurrent Assets/Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 3,313	$ 5,283

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

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