The plan, which includes significant job and branch cuts and the sale of small subsidiaries, had been given the green light on Wednesday by the European Commission.
The scheme envisages a drop in the number of branches from 2,750 in 2012 to 2,200 by 2017 and the number of employees is expected to be cut from 31,000 at the end of 2011 to 23,000 by the end of the period.
The lender also hopes to boost its internet use, increasing the number of web customers from a current 1.0 percent to 10 percent, it said in a statement.
The bank said it aimed to cut costs by €713 million from 2012, and is aiming for a net profit of €900 million in 2017.
It confirmed borrowed funds would be repaid to the European Central Bank by the deadline in 2015.