12 Receivables

12 Receivables
  31.12.2013 31.12.2012
Trade accounts receivable 483,384 483,218
Allowances for doubtful accounts -28,508 -27,211
Other receivables 54,633 52,305
Other receivables towards associates and partner plants 620 351
Total 510,129 508,663

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.