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Leases - Components of Lease Expense (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Finance lease cost  
Finance lease cost, amortization of right-of-use assets $ 32
Finance lease cost, interest on lease liabilities 13
Operating lease cost 115
Short-term lease cost 68
Sub-lease income (11)
Total $ 217