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Leases - Supplemental Information Related to Leases (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Cash paid for amounts included in the measurement of lease liabilities, operating cash flows from finance leases $ 10 $ 11  
Cash paid for amounts included in the measurement of lease liabilities, operating cash flows from operating leases 83 96  
Cash paid for amounts included in the measurement of lease liabilities, financing cash flows from finance leases 26 31 $ 32
Right-of-use assets obtained in exchange for new:      
Right-of-use assets obtained in exchange for new operating lease liabilities 37 47  
Right-of-use assets obtained in exchange for new finance lease liabilities $ 9 $ 16  
Weighted average remaining lease term (years), operating leases 11 years 11 years  
Weighted average remaining lease term (years), finance leases 18 years 18 years  
Weighted average discount rate, operating leases 4.74% 4.93%  
Weighted average discount rate, finance leases 3.86% 3.92%