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Leases - Supplemental balance sheet information (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Mar. 31, 2021 | Apr. 01, 2019
--- | --- | --- | ---
Lessee, Lease, Description [Line Items] |  |  |
Operating lease right-of-use assets | $ 1,548 | $ 2,100 | $ 2,100
Current portion of operating lease liabilities | 297 | 390 |
Long-term operating lease liabilities | 1,366 | 1,867 |
Total operating lease liabilities | $ 1,663 | $ 2,257 | $ 2,200
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property, plant, and equipment, net | Property, plant, and equipment, net |
Property, plant and equipment, net | $ 206 | $ 237 |
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Less: Current portion | Less: Current portion |
Current portion of long-term debt | $ 25 | $ 22 |
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Long-term debt | Long-term debt |
Long-term debt | $ 185 | $ 206 |
Total finance lease liabilities | $ 210 | $ 228 |
Weighted average remaining lease term (Years) - Operating leases | 6 years 10 months 24 days | 7 years 9 months 18 days |
Weighted average remaining lease term (Years) - Finance leases | 8 years 9 months 18 days | 10 years 1 month 6 days |
Weighted average discount rate - Operating leases (percent) | 2.47% | 2.53% |
Weighted average discount rate - Finance leases (percent) | 2.50% | 2.71% |
European Businesses (Disposal Group) | Held-for-sale |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Operating lease right-of-use assets | $ 494 |  |
Current portion of operating lease liabilities | 83 |  |
Long-term operating lease liabilities | $ 442 |  |

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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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