Accounts receivable, net - Summary of accounts receivable (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 5,675	$ 4,290	$ 5,863
Less: allowance for credit losses	(142)	(149)	(139)
Other current receivables	360	366	395
Total accounts receivable, net	5,893	4,507	6,119
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	4,788	3,574	4,957
Construction contract assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 887	$ 716	$ 906