Income taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Total tax expense	$ 430	$ 379	$ 411	$ 365
Effective income tax rate	25.00%	24.00%	22.00%	24.00%