Millions of euro | ||||
at Dec. 31, 2019 | at Dec. 31, 2018 | Change | ||
Receivables from institutional market operators | 732 | 745 | (13) | -1.7% |
Advances to suppliers | 314 | 299 | 15 | 5.0% |
Receivables due from employees | 28 | 30 | (2) | -6.7% |
Other receivables | 1,084 | 1,139 | (55) | -4.8% |
Sundry tax receivables | 797 | 622 | 175 | 28.1% |
Accrued operating income and prepaid expenses | 160 | 148 | 12 | 8.1% |
Total | 3,115 | 2,983 | 132 | 4.4% |
Receivables from institutional market operators include receivables in respect of the Italian system in the amount of €450 million (€526 million at December 31, 2018) and the Spanish system in the amount of €254 million (€185 million at December 31, 2018).
The increase of €175 million in sundry tax receivables is mainly attributable to a reclassification of tax receivables of Enel Distribuição São Paulo to short term.
Other receivables decreased mainly due to the collection of the receivable deriving from the sale of the eight renewable companies in Mexico last year. This effect is partially offset by the recognition of contingent assets following the sale of a number of companies in North America.