Loans and finance receivables - Schedule of reconciliation of allowance for credit losses on loans and finance receivables (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for Credit Loss [Abstract]
Balance at the beginning of the year	$ 856	$ 765	$ 712
Provision for credit losses	169	124	88
Charge-offs, net of recoveries	(75)	(33)	(35)
Balance at December 31	$ 950	$ 856	$ 765