Property, plant and equipment (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, plant and equipment
Total property, plant and equipment, at cost	$ 29,477	$ 28,623
Less: Accumulated depreciation	(16,116)	(15,943)
Property, plant and equipment–net	13,361	12,680
Land
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	612	616
Buildings and land improvements
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	7,281	7,154
Machinery , equipment, other, and equipment leased to others
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	12,523	12,150
Equipment leased to others	5,701	5,837
Software
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	1,609	1,607
Construction-in-process
Property, plant and equipment
Property, plant, and equipment, excluding equipment leased to others, at cost	$ 1,751	$ 1,259
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