Trade receivables and unbilled revenues, net of allowance for credit losses, were as follows: | | | | | | | | | | | | | | | | | | | | December 31, 2024 | | December 31, 2023 | | December 31, 2022 | | | | | | | | (in US $ millions) | | Unbilled revenues, net | 175 | | | 132 | | | 123 | | | Trade receivables, net | 77 | | | 62 | | | 80 | | | Indirect taxes receivable | 49 | | | 46 | | | 31 | | | Other receivables | 22 | | | 27 | | | 23 | | | Accrued interest | 19 | | | 15 | | | 16 | | | | 342 | | | 282 | | | 273 | |
Activity in the allowance for credit losses was as follows: | | | | | | | | | | | | | | | | | December 31, 2024 |
| December 31, 2023 | | | | | | | | | | (in US $ millions) | | | | Balance, beginning of the year | 13 | | | 16 | | | | | Provision for credit losses related to uncollectible receivables | 15 | | | 9 | | | | | Write-offs | (12) | | | (12) | | | | | Balance, end of the year | 16 | | | 13 | | | |
| | | | | | | | | | | | | | | | | | | December 31, 2024 | | December 31, 2023 | | December 31, 2022 | | | | | | | | (in US $ millions) | Loans receivable, gross(1) | 1,131 | | | 732 | | | 228 | | | Allowance for credit losses related to uncollectible loans receivable | (110) | | | (60) | | | (19) | | | Merchant cash advances receivable, gross | 234 | | | 180 | | | 420 | | | | | | | | | Allowance for credit losses related to uncollectible merchant cash advances receivable | (31) | | | (36) | | | (49) | | | Loans and merchant cash advances, net | 1,224 | | | 816 | | | 580 | |
(1) Included in the loans receivable gross balance as of December 31, 2024 is $15 million of interest receivable (December 31, 2023 - $10 million, December 31, 2022 - $3 million).
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