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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Mar. 31, 2022
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Operating Lease, Supplemental Balance Sheet Information [Abstract] |  |
Operating right-of-use assets, net | $ 1,025 | $ 1,133
Current operating lease liabilities | 346 | 388
Non-current operating lease liabilities | 742 | 815
Total operating lease liabilities | $ 1,088 | $ 1,203
Weighted-average operating lease term | 4 years 2 months 12 days | 4 years 4 months 24 days
Weighted-average operating lease discount rate | 3.40% | 3.30%
Finance Lease, Supplemental Balance Sheet Information [Abstract] |  |
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property and equipment, net of accumulated depreciation of $3,917 and $3,998 | Property and equipment, net of accumulated depreciation of $3,917 and $3,998
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Short-term debt and current maturities of long-term debt | Short-term debt and current maturities of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Long-term debt, excluding finance lease liabilities | Long-term debt, excluding finance lease liabilities
ROU finance lease assets | $ 534 | $ 602
Finance lease, liability, current | 267 | 289
Finance lease, liability, noncurrent | 321 | 354
Total finance lease liabilities | $ 588 | $ 643
Weighted-average finance lease term | 2 years 9 months 18 days | 2 years 9 months 18 days
Weighted-average finance lease discount rate | 2.90% | 2.90%

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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