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Leases - Maturities of lease liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
2019   $ 193
2020 $ 146 154
2021 117 118
2022 92 91
2023 66 66
2024 and thereafter 298 283
Total operating lease payments 719 $ 905
Less: imputed interest 166  
Present value of lease liabilities $ 553