Flight Crew Air Transport Pilot (ATP)
Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action
Procedure; Environment - Non Weather Related
Enroute wake turbulence at FL340. 767-300 12 miles ahead and 2000 ft higher. Crew monitored assigned speed/altitude and descended out of it after ATC clearance.
B757 First Officer reported encountering wake turbulence at FL340 12 miles in trail of a B767-300 at FL360.