Contractual interest rate for funds borrowed, under the debt agreement.

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-Topic 210
-SubTopic 10
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-Paragraph 1
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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Debt and Financing Activities - Schedule Of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 7,387	$ 7,595
Less: Current portion	(1,052)	(330)
Total long-term debt	6,335	7,265
Notes \| 3.65% Notes due November 30, 2020
Debt Instrument [Line Items]
Total debt	$ 700	700
Debt interest rate (percent)	3.65%
Notes \| 4.75% Notes due March 1, 2021
Debt Instrument [Line Items]
Total debt	$ 323	323
Debt interest rate (percent)	4.75%		4.75%
Notes \| 2.70% Notes due December 15, 2022
Debt Instrument [Line Items]
Total debt	$ 400	400
Debt interest rate (percent)	2.70%
Notes \| 2.85% Notes due March 15, 2023
Debt Instrument [Line Items]
Total debt	$ 400	400
Debt interest rate (percent)	2.85%
Notes \| 3.80% Notes due March 15, 2024
Debt Instrument [Line Items]
Total debt	$ 1,100	1,100
Debt interest rate (percent)	3.80%
Notes \| 7.65% Debentures due March 1, 2027
Debt Instrument [Line Items]
Total debt	$ 167	167
Debt interest rate (percent)	7.65%		7.65%
Notes \| 3.95% Notes due February 16, 2028
Debt Instrument [Line Items]
Total debt	$ 600	600
Debt interest rate (percent)	3.95%
Notes \| 4.75% Notes due May 30, 2029
Debt Instrument [Line Items]
Total debt	$ 400	400
Debt interest rate (percent)	4.75%
Notes \| 6.00% Notes due March 1, 2041
Debt Instrument [Line Items]
Total debt	$ 282	282
Debt interest rate (percent)	6.00%		6.00%
Notes \| 4.88% Notes due March 15, 2044
Debt Instrument [Line Items]
Total debt	$ 411	411
Debt interest rate (percent)	4.88%		4.88%
Notes \| Floating Rate Euro Notes due February 12, 2020
Debt Instrument [Line Items]
Total debt	$ 0	280
Notes \| 0.63% Euro Notes due August 17, 2021
Debt Instrument [Line Items]
Total debt	$ 662	673
Debt interest rate (percent)	0.63%
Notes \| 1.50% Euro Notes due November 17, 2025
Debt Instrument [Line Items]
Total debt	$ 659	670
Debt interest rate (percent)	1.50%
Notes \| 1.63% Euro Notes due October 30, 2026
Debt Instrument [Line Items]
Total debt	$ 552	560
Debt interest rate (percent)	1.63%
Notes \| 3.13% Sterling Notes due February 17, 2029
Debt Instrument [Line Items]
Total debt	$ 557	586
Debt interest rate (percent)	3.13%
Lease and other obligations
Debt Instrument [Line Items]
Total debt	$ 174	$ 43