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Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Mar. 31, 2025
Operating leases    
Operating lease right-of-use assets $ 2,058 $ 1,782
Current portion of operating lease liabilities 287 258
Long-term operating lease liabilities 1,801 1,478
Total operating lease liabilities 2,088 1,736
Finance leases    
Property, plant, and equipment, net $ 137 $ 177
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, plant, and equipment, net Property, plant, and equipment, net
Current portion of long-term debt $ 37 $ 32
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Less: Current portion Less: Current portion
Long-term debt $ 152 $ 163
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Long-term debt Long-term debt
Total finance lease liabilities $ 189 $ 195
Weighted-average remaining lease term (years)    
Operating leases 8 years 8 years
Finance leases 5 years 6 months 6 years 3 months 18 days
Weighted-average discount rate    
Operating leases 4.17% 4.11%
Finance leases 3.45% 3.27%