Leases - Components of operating lease expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lease, Cost [Abstract]
Operating lease expense	$ 1,652	$ 1,535	$ 1,361
Short-term lease expense	171	219	233
Variable lease expense	225	216	217
Total lease expenses	$ 2,048	$ 1,970	$ 1,811