Hello siva.ssk7,
we don't have that information directly, but it's easy to get:
Run a report and go in the "Agents" tab; you'll find the "Agent Occupancy Report".
The "Occupancy %" is calculated in this way: Talk time / (Total session - Total Pause); so if you have an occupancy of 80%, you'll nkow that the idle time is 20% (of Total session - Total Pause)
Mirko