Loans and finance receivables - Schedule of reconciliation of allowance for credit losses on loans and finance receivables (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Allowance for Credit Loss [Abstract]
Balance at the beginning of the year	$ 950	$ 856
Provision for credit losses	39	37
Charge-offs, net of recoveries	(16)	(17)
Balance at March 31	$ 973	$ 876