Leases - Summary of Information related to operating leases (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Right-of-use assets	$ 5,843	$ 5,277
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other	Other
Lease liabilities	$ 5,996	$ 5,299
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	us-gaap:AccountsPayableAndOtherAccruedLiabilities	us-gaap:AccountsPayableAndOtherAccruedLiabilities
Weighted average remaining term in years	7 years 6 months	7 years
Weighted average discount rate used to measure lease liabilities	4.50%	4.20%