overheating,no powersteering and no heat

[badly probed]

while i was doing 70mph on I94 i heard what sounded like a belt come off,after i noticed it was overheating and i had no power steering,and lost all heat inside of cab,can anyone please help,i just put a new water pump and thermostat on,as well as a new serpentine belt the freeze plug is intact and it has new plugs and wires...i really have no idea whats wrong with it...someone please help.

[KimMG]

Have you checked the belt? It maybe missing or severely slipping.

[badly probed]

found the prob. i lost the idler pulley.now i have the new part but can't seem to find out what the nut and the backing shield is called