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Receivables, Prepayments and Other Assets
 9 Months Ended
Sep. 30, 2024
Trade and other current receivables [abstract]  
Receivables, Prepayments and Other Assets Receivables, Prepayments and Other Assets
September 30 2024December 31 2023
Current:
Trade receivables, other than related parties
$706 $1,002 
Other receivables445 255 
Unbilled accounts receivable(1)
46 33 
Receivables from government grants58 66 
Receivables from related parties11 12 
Other current financial assets57 52 
Total$1,323 $1,420 
Non-current:
Advances to suppliers $189 $213 
Receivables from government grants
98 106 
Other31 24 
Total$318 $343 
(1) Unbilled accounts receivable represents amounts recognized on revenue contracts less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms or rendering services.

The following table summarizes the activity in the Company’s unbilled accounts receivable for the nine months ended September 30, 2024 and for the twelve months ended December 31, 2023, respectively:

September 30 2024December 31 2023
Balance, beginning of period$33 $24 
Revenue recognized during the period89 101 
Amounts invoiced(76)(92)
Balance, end of period$46 $33