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Supplemental Cash Flow Information Related to Leases (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:        
Operating cash flows from operating leases $ 533 $ 505 $ 1,506 $ 1,437
Operating cash flows from finance leases 100 87 286 249
Financing cash flows from finance leases 168 110 457 293
Right-of-use assets obtained in exchange for lease obligations:        
Operating leases 1,106 680 3,362 2,611
Finance leases $ 836 $ 259 $ 2,664 $ 2,611