Property, plant and equipment, net - Schedule of Property, plant and equipment (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Finance lease right-of-use assets	$ 376	$ 187
Total property, plant and equipment	37,154	32,764
Less: accumulated depreciation, depletion, amortization and impairment	(15,702)	(14,923)
Total property, plant and equipment, net	21,452	17,841
Mineral-bearing land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,159	4,847
Land and buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment	6,609	5,991
Plant and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment	23,047	20,468
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,963	$ 1,271