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Supplemental Cash Flow Information Related to Leases (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:        
Operating cash flows from operating leases $ 505 $ 425 $ 1,437 $ 1,229
Operating cash flows from finance leases 87 65 249 179
Financing cash flows from finance leases 110 66 293 167
Right-of-use assets obtained in exchange for lease obligations:        
Operating leases 680 730 2,611 1,698
Finance leases $ 259 $ 658 $ 2,611 $ 1,722