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, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Credit Loss [Abstract]
Balance at beginning of year	$ 765	$ 712	$ 167
Adoption of ASC 326			486
Provision for credit losses	124	88	177
Charge-offs, net of recoveries	(33)	(35)	(118)
Balance at December 31	$ 856	$ 765	$ 712