Leases - Information Related to Operating Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Right-of-use assets	$ 7,782	$ 7,888
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities
Lease liabilities	$ 8,183	$ 8,328
Weighted average remaining lease term (in years)	8 years 4 months 24 days	8 years 6 months
Weighted average discount rate	3.55%	3.40%
Supplemental cash flow information
Cash paid for amounts included in the measurement of lease liabilities - operating cash flows	$ 1,613	$ 1,656
Supplemental non-cash information
Right-of-use assets obtained in exchange for operating lease obligations	1,435	1,167
Rental expense
Gross rental expense	2,079	2,086
Sublease rental income	(119)	(129)
Net rental expense	$ 1,960	$ 1,957