Property, plant and equipment (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment
Total property, plant and equipment, at cost	$ 28,623	$ 28,064
Less: Accumulated depreciation	(15,943)	(16,036)
Property, plant and equipment–net	12,680	12,028
Land
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	616	622
Buildings and land improvements
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	7,154	7,016
Machinery , equipment, other, and equipment leased to others
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	12,150	12,282
Equipment leased to others	5,837	5,568
Software
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	1,607	1,556
Construction-in-process
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	$ 1,259	$ 1,020
Minimum | Buildings and land improvements
Property, plant and equipment
Useful Lives (Years)	20 years
Minimum | Machinery , equipment, other, and equipment leased to others
Property, plant and equipment
Useful Lives (Years)	2 years
Minimum | Software
Property, plant and equipment
Useful Lives (Years)	3 years
Minimum | Equipment leased to others
Property, plant and equipment
Useful Lives (Years)	1 year
Maximum | Buildings and land improvements
Property, plant and equipment
Useful Lives (Years)	45 years
Maximum | Machinery , equipment, other, and equipment leased to others
Property, plant and equipment
Useful Lives (Years)	10 years
Maximum | Software
Property, plant and equipment
Useful Lives (Years)	7 years
Maximum | Equipment leased to others
Property, plant and equipment
Useful Lives (Years)	7 years