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Leases - Supplemental Balance Sheet Information Related To Leases (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Operating leases:    
Operating lease ROU assets $ 495 $ 559
Other current liabilities 109 116
Operating lease liabilities 416 479
Total operating lease liabilities $ 525 $ 595
Weighted average remaining lease term Operating leases 7 years 3 months 18 days 7 years 6 months
Weighted average discount rate Operating leases 5.40% 5.20%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating lease liabilities Operating lease liabilities