Grant anonymous\everyone access to a group of reports

I have a group of reports accessible via the console.  I want everyone to have access so I created a security role that does exactly what I need.  I tried to add "NT Authority\Authenticated Users" as a member of the role but it only seems to work for accounts already in the console.  I'd rather not manage members of the security role and these people would have no other reason to be in the console.  Is there a way I can grant this kind of user access without adding "Domain Users" to the AD import?