Significant Events and Transactions of the Period	12 Months Ended
Dec. 31, 2016
Significant Events and Transactions of the Period Disclosure [Abstract]
Significant Events and Transactions of the Period	Significant Events and Transactions of the Period Changes in the scope of consolidation Business combinations HookLogic Inc. On November 9, 2016, we completed the acquisition of all of the outstanding shares of Hooklogic, Inc. ("HookLogic"). Please refer to Note 3 for further details. Monsieur Drive Acquisition On May 31, 2016, we acquired all of the outstanding shares of Monsieur Drive SAS. ("Monsieur Drive"), a Paris-based company building advertising products for the consumer packaged goods vertical. Please refer to Note 3 for further details. Consolidation scope Creation of Criteo India Pvt Ltd (India) This new subsidiary is 100% held and controlled by the Parent Company. It is included in the Company’s consolidation scope as of December 31, 2016, but its contribution to the Consolidated Financial Statements is not material. Creation of Criteo Finance SAS (France) This new subsidiary is 100% held and controlled by the Parent company. It is included in the Company’s consolidation scope as of December 31, 2016, but its contribution to the Consolidated Financial Statements is not material. The business objective of this subsidiary is to enhance the service level to strategic global customers by providing them with one single billing relationship and to consolidate the management of the foreign exchange risk. Changes in Group funding Drawing on Group Revolving Credit Facility In September 2015, Criteo S.A. entered into a Multicurrency Revolving Facility Agreement for general purposes of the Group including the funding of business combinations. In the context of the acquisition of HookLogic Inc., $75.0 million was drawn in November 2016. Drawing on Chinese revolving loan facility In October 2014, we entered into a revolving loan facility with HSBC to support the development of our Chinese subsidiary for a total amount of RMB15.0 million. This facility was increased to RMB 40.0 million in May 2015. At December 31, 2015 and 2016, RMB 25 million ($3.9 million) and RMB 30.0 million ($4.3 million) was drawn.

Significant Events and Transactions of the Period

Changes in the scope of consolidation

Business combinations

HookLogic Inc.

On November 9, 2016, we completed the acquisition of all of the outstanding shares of Hooklogic, Inc. ("HookLogic"). Please refer to Note 3 for further details.

Monsieur Drive Acquisition

On May 31, 2016, we acquired all of the outstanding shares of Monsieur Drive SAS. ("Monsieur Drive"), a Paris-based company building advertising products for the consumer packaged goods vertical. Please refer to Note 3 for further details.

Consolidation scope

Creation of Criteo India Pvt Ltd (India)

This new subsidiary is 100% held and controlled by the Parent Company. It is included in the Company’s consolidation scope as of December 31, 2016, but its contribution to the Consolidated Financial Statements is not material.

Creation of Criteo Finance SAS (France)

This new subsidiary is 100% held and controlled by the Parent company. It is included in the Company’s consolidation scope as of December 31, 2016, but its contribution to the Consolidated Financial Statements is not material. The business objective of this subsidiary is to enhance the service level to strategic global customers by providing them with one single billing relationship and to consolidate the management of the foreign exchange risk.

Changes in Group funding

Drawing on Group Revolving Credit Facility

In September 2015, Criteo S.A. entered into a Multicurrency Revolving Facility Agreement for general purposes of the Group including the funding of business combinations. In the context of the acquisition of HookLogic Inc., $75.0 million was drawn in November 2016.

Drawing on Chinese revolving loan facility

In October 2014, we entered into a revolving loan facility with HSBC to support the development of our Chinese subsidiary for a total amount of RMB15.0 million. This facility was increased to RMB 40.0 million in May 2015. At December 31, 2015 and 2016, RMB 25 million ($3.9 million) and RMB 30.0 million ($4.3 million) was drawn.