Segment information - Summary of adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting [Abstract]
Adjusted EBITDA	$ 495	$ 445
Depreciation, depletion and amortization	(477)	(397)
Interest income	37	43
Interest expense	(181)	(133)
(Loss) gain on divestitures and investments	(26)	160
Pension income excluding current service cost component	4	1
Other interest, net	2	0
Substantial acquisition-related costs	0	(20)
(Loss) income from operations before income tax expense and income from equity method investments	$ (146)	$ 99
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other nonoperating (expense) income, net	Other nonoperating (expense) income, net