The IDP is a Permit and not a license. If the countries where an IDP is stated as being required, you need to have both your license and the IDP
Many countries require Australians to have an international driving permit (IDP) in addition to a valid Australian driving licence to legally drive a car, or ride a motorbike. An IDP is a widely recognised document that can be issued by associated members of the Australian Automobile Association (AAA). Before driving overseas, Australians should contact the appropriate foreign mission in Australia for information on drivers licence requirements.
Ensure the IDP allows you to drive or ride the vehicles you intend to use. Some insurance policies will not cover you if you have an accident using a vehicle you are not licensed to drive.