No user list id in Audience performance report?

Hi,

Unless I'm missing something I don't see any option to fetch the user list id (the list name is available using UserListName) using Audience performance report. Is it so?

I already implemented some automation to translate the user list names to ids using a map of list name to list id I pre-fetch using  AdwordsUserListServiceInterface. Now the issue is I found out that for "Similar" audiences the report doesn't return the list name as it is being retrieved using AdwordsUserListServiceInterface but something in the standard of "Similar to UserListId: 398038172". 

Do I have better options then simply analyzing "Similar to UserListId: 398038172" and taking the id out the string?

Thanks

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