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Leases - Supplemental Balance Sheet Information Related To Leases (Detail)
$ in Millions
Mar. 31, 2019
USD ($)
Operating leases:  
Operating lease ROU assets $ 517
Other current liabilities 114
Operating lease liabilities 424
Total operating lease liabilities $ 538
Weighted average Remaining Lease Term 7 years 7 months 6 days
Weighted average Discount Rate 6.10%