Following are SYSTEM defined members for ICP dimension.

[ICP Top] SPECIFIES the top INTERCOMPANY member[ICP None] Specifies that no intercompany member is used
[ICP Entities] Specifies the entities that are designated for intercompany transactions

The System will automatically creates a ICP member when you select the IsICP attribute, see the below for your reference.

When you create an application, Intercompany PARTNER members are automatically created for the application. An ICP member is created for each Entity member for which the IsICP attribute is selected.

Following are system defined members for ICP dimension.

[ICP Top] Specifies the top intercompany member[ICP None] Specifies that no intercompany member is used
[ICP Entities] Specifies the entities that are designated for intercompany transactions

The System will automatically creates a ICP member when you select the IsICP attribute, see the below for your reference.

When you create an application, Intercompany Partner members are automatically created for the application. An ICP member is created for each Entity member for which the IsICP attribute is selected.