riches beyond (someone's) wildest dreams

Translations
богатства, превосходящие (чьи-то) самые смелые мечты
Winning the lottery brought him riches beyond his wildest dreams.
Выигрыш в лотерею принес ему богатства, превосходящие его самые смелые мечты.
Definitions
A phrase used to describe an extremely large amount of wealth or success, far greater than someone could have ever imagined or hoped for.