Income taxes - Components of deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Capitalized R&D	$ 1,076	$ 750
Accrued expenses	297	236
Deferred loss and tax credit carryforwards	216	205
Stock compensation	186	163
Inventories	105	104
Retirement costs for defined benefit and retiree health care	17	37
Other	23	47
Total deferred tax assets, before valuation allowance	1,920	1,542
Valuation allowance	(212)	(198)
Total deferred tax assets, after valuation allowance	1,708	1,344
Deferred tax liabilities:
Property, plant and equipment	(441)	(592)
CHIPS Act incentives	(336)	0
International earnings	(33)	(33)
Acquisition-related intangibles and fair-value adjustments	(6)	(14)
Other	(9)	(11)
Total deferred tax liabilities	(825)	(650)
Net deferred tax asset	$ 883	$ 694