Income taxes (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Income Tax Disclosure [Abstract]
Discrete tax benefit	$ 180
Unrecognized tax benefits	82
Unrecognized tax benefits that would impact effective tax rate if recognized	82
Accrued interest related to the gross unrecognized tax benefits excluded from the unrecognized tax benefits	22
Accrued penalties related to the gross unrecognized tax benefits excluded from the unrecognized tax benefits	2
Decrease in unrecognized tax benefits that is reasonably possible (up to)	$ 30