Kaka, with AC Milan in 2009, was the subject of a world record â‚¬112m bid from City that January.
"The negotiations were indeed advanced. The only thing that separated me from City was a signature," he recalled to Four Four Two.
"It came to a point where all the figures and precise details had already been discussed. The salary offered to me was many times higher than I earned at Milan. I went to see how it would be to play football in England, how my daily routine at the club would look, how difficult it would be for my children and wife to move. All of these things flew through my mind.
"I had absolutely no idea that City wanted to sign me until they had filed an official bid at Milan.
"I came to the conclusion that it was not yet the right time to go to City, and the main reason was the uncertainty about the construction of the squad and how fast that process would run.
"I was asked to exchange one of the most successful clubs in Europe with a very rich history for a team that only was at the start of a new project, where I was told, I would be the first big player. It was safer to stay at Milan."