|Trade accounts receivable||483,384||483,218|
|Allowances for doubtful accounts||-28,508||-27,211|
|Other receivables towards associates and partner plants||620||351|
All receivables fall into the category loans and receivables and are measured at amortised cost. The total sum of receivables at 31 December 2013 (and 31 December 2012) falls due within one year. Due to their short-term nature, the carrying amounts are assumed to be fair values.
The maturity structure of the receivables and the development of impairments are shown in the section risk management and financial risk management.