[33] Trade payables

As at 31 December 2017, trade payables of €923.9 million (31 December 2016: €802.2 million) included liabilities to non-consolidated subsidiaries of €6.0 million (31 December 2016: €4.7 million) and liabilities to equity-accounted investments and other equity investments of €17.7 million (31 December 2016: €15.0 million).