Leases - Summary of Information related to operating leases (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Right-of-use assets	$ 5,277	$ 4,975
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other	Other
Lease liabilities	$ 5,299	$ 4,939
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	us-gaap:AccountsPayableAndOtherAccruedLiabilities	us-gaap:AccountsPayableAndOtherAccruedLiabilities
Weighted average remaining term in years	7 years	7 years
Weighted average discount rate used to measure lease liabilities	4.20%	3.70%