Accounts receivable, net - Summary of accounts receivable (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 4,519	$ 4,290
Less: allowance for credit losses	(140)	(149)
Other current receivables	441	366
Total accounts receivable, net	4,820	4,507
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	3,829	3,574
Construction contract assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 690	$ 716