Supplemental financial information - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) factory	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) factory	Sep. 30, 2024 USD ($)
Disclosure Text Block Supplement [Abstract]
Restructuring charges/other | $	$ 85	$ 0	$ 85	$ (124)
Number of factories closing | factory	2		2