Map of countries with member parties who are either in government or leader of the government coalition are in green. Countries with member parties who are part of the government coalition, but do not lead it, are in yellow. (The Republican Party in the United States holds a majority in the House of Representatives but holds a minority in the Senate). Countries with member parties not in government are in red.
The IDU provides a forum in which political parties holding similar beliefs can come together and exchange views on matters of policy and organisational interest. From this, they act cooperatively, establish contacts, and present a unified voice toward the promotion of centre-right policies across the globe. The IDU has some overlap of member parties with the Centrist Democrat International (CDI), but the CDI is more centrist and communitarian than the IDU.