Basis of Presentation - Additional Information (Details)	Dec. 31, 2017
OT South Africa
Noncontrolling Interest [Line Items]
Ownership percentage by Open Text	70.00%
GXS Korea
Noncontrolling Interest [Line Items]
Ownership percentage by Open Text	85.00%
GXS Singapore
Noncontrolling Interest [Line Items]
Ownership percentage by Open Text	81.00%