Leases - Schedule Of Lease Expense For Finance And Operating Leases (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Finance lease expense:
Amortization of leased assets	$ 93
Interest on lease liabilities	32
Operating leases	389	[1]
Short-term lease expense	316	[1]
Variable lease expense	150	[1]
Total lease expense	$ 980

[1] Expenses are included in “other operating expenses” in our condensed consolidated income statements.