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Leases - Future Minimum Lease Commitments for Leases with Initial or Remaining Terms of One Year or More (Detail) - USD ($)
$ in Millions
Sep. 30, 2019
Jan. 01, 2019
Operating    
Operating lease, 2019 $ 35  
Operating lease, 2020 110  
Operating lease, 2021 87  
Operating lease, 2022 67  
Operating lease, 2023 50  
Operating lease, Thereafter 282  
Total lease payments 631  
Less: Interest (130)  
Present value of lease liabilities 501 $ 554
Finance    
Finance leases, 2019 14  
Finance leases, 2020 47  
Finance leases, 2021 39  
Finance leases, 2022 28  
Finance leases, 2023 20  
Finance leases, Thereafter 253  
Total lease payments 401  
Less: Interest (116)  
Present value of lease liabilities $ 285 $ 285