Segment information - Summary of adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting [Abstract]
Adjusted EBITDA	$ 2,695	$ 2,454	$ 5,653	$ 5,154
Depreciation, depletion, amortization and impairment	(601)	(467)	(1,606)	(1,288)
Interest income	37	33	104	112
Interest expense	(209)	(164)	(590)	(452)
Gain (loss) on divestitures and investments	4	59	(38)	242
Pension income excluding current service cost component	5	1	14	3
Other interest, net	3	2	7	1
Substantial acquisition-related costs	(13)	(23)	(13)	(45)
Income from operations before income tax expense and income from equity method investments	$ 1,921	$ 1,895	$ 3,531	$ 3,727
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other nonoperating income (expense), net	Other nonoperating income (expense), net