Assalam Aleykum,
The prophet Idris, peace be upon him was before a prohet Hud and we know from Imam's statements that his people were from the tribe of Aad and Aad people were abundantly gifted in creaton by Allah and lived more than 2000 years and had the very big body sizes. A prophet Idris and Ilyas are two prophets ( peace and blessings upon them) who alive today and remain in the cave has mentioned in this website by Imam Mahdi, peace be upon him. How long their people lived? 1000 years?