|Millions of euro|
|at Dec. 31, 2013||at Dec. 31, 2012 restated||Change|
|Payables due to customers||1,563||1,637||(74)||-4.5%|
|Payables due to Electricity Equalization Fund and similar bodies||3,312||3,371||(59)||-1.8%|
|Payables due to employees||453||519||(66)||-12.7%|
|Other tax payables||976||945||31||3.3%|
|Payables due to social security institutions||216||226||(10)||-4.4%|
|Payables for put options granted to minority shareholders||801||814||(13)||-1.6%|
|Payables for acquisition of equity investments||37||81||(44)||-54.3%|
“Payables due to customers” include €1,090 million (€1,101 million at December 31, 2012) in security deposits related to amounts received from customers as part of electricity and gas supply contracts. Following the finalization of the contract, deposits for electricity sales, the use of which is not restricted in any way, are classified as current liabilities given that the Company does not have an unconditional right to defer repayment beyond 12 months.
“Payables due to Electricity Equalization Fund and similar bodies” mainly include payables arising from the application of equalization mechanisms to electricity purchases on the Italian market amounting to €1,922 million (€1,862 million at December 31, 2012) and on the Spanish market amounting to €1,390 million (€1,491 million at December 31, 2012).
The item “Payables for put options granted to minority shareholders” at December 31, 2013 includes the liability to Enel Distributie Muntenia and Enel Energie Muntenia in the total amount of €778 million (unchanged on December 31, 2012) and that in respect of Renovables de Guatemala and Maicor Wind in the amount of €23 million.
“Payables for acquisition of equity investments” regard the purchase in 2013 of a number of companies in North America in the amount of €37 million.
“Other” payables include €76 million in respect of the liability associated with the application of the union agreements to implement the provisions of Article 4 of the Fornero Act with regard to other forms of incentive awarded under those agreements for persons who at December 31, 2013 were no longer employed with Enel.