The XBRL tuples can be viewed in the Concepts tab. You display the dimension view for a active taxonomy by way of the relationship view list (on the top right corner of the Concepts tab). After you select the tuple view, the top panel shows all of the tuple nodes (if any).
When you select a tuple from the top pane, the Tuples Detail pane (bottom panel) updates to display tuple group member detail.
The bottom pane shows a Tuples Group pane, which enables you to map tuple members to Tuple groups.
To map a tuple member to a tuple group:
In the top panel, find the parent tuple element.
For example, you could look for "Entity former legal or registered name [grouping]".
You are prompted to provide a name for the tuple instance.
After providing a name, the tuple tree is re-created in the bottom panel.
Map the individual tuple members from the bottom panel using the same mapping paradigm used to map regular concepts (in the presentation view).
If a particular tuple member needs to be mapped to two or more data elements (for example, "Former name"), you can create a second instance of the tuple member within the tuple group by selecting the member and clicking o on the bottom panel.