Other current assets and accrued liabilities - Schedule of Other Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Prepaid expenses	$ 1,647	$ 1,204
Corporate partner receivables	502	700
Tax receivables	172	129
Other	281	355
Total other current assets	$ 2,602	$ 2,388