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Leases - Schedule Of Lease-Related Assets And Liabilities (Detail)
$ in Millions
Jun. 30, 2019
USD ($)
Assets:  
Operating leases $ 1,787
Finance leases 598
Total lease assets 2,385
Liabilities  
Operating leases 339
Finance leases 90
Operating leases 1,460
Finance leases 447
Total lease liabilities $ 2,336
Weighted-average remaining term:  
Operating leases 11 years 6 months
Finance leases 9 years 10 months 24 days
Weighted-average discount rate:  
Operating leases 5.50% [1]
Finance leases 6.20%
[1] Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019.