Accounts receivable, net - Summary of accounts receivable (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 4,290	$ 4,041
Less: allowance for credit losses	(149)	(125)
Other current receivables	366	384
Total accounts receivable, net	4,507	4,300
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	3,574	3,435
Construction contract assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 716	$ 606