Leases - Components of operating lease expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lease, Cost [Abstract]
Operating lease expense	$ 1,535	$ 1,361	$ 1,426
Short-term lease expense	219	233	154
Variable lease expense	216	217	223
Total lease expenses	$ 1,970	$ 1,811	$ 1,803