"The Juve negotiations came about in a surprising manner. It was like a bolt out of the blue as I didn't expect it," said Ranieri, who signed a three-year contract yesterday.
"I had read my name in the newspapers and I asked myself whether it was true. Then there was the first call and that was pleasing.
The Old Lady turned to Ranieri following the departure of Didier Deschamps and he's looking forward to the task following their return to Serie A.
"It's a great challenge, tough and electrifying," he added. "We need to work hard and get back to the positions which Juventus deserve to be in.
"I thank Juventus for choosing me and this fills me with pride. There is an ambitious project and I'm certain that we will do well."
When asked what his side could realistically achieve next term, Ranieri insisted that it will take time to rebuild the club following Calciopoli.
"The club have told me they want to be back to the very highest levels in five years, we'll look to make that happen sooner," he added.
"I was shown the possibility of taking Juventus back to the positions where they are used to competing.
"The squad will be a mix of champions and youngsters with great potential. Our transfer targets? We certainly won't be giving any names to the media."
