Citigroup CEO Vikram Pandit stepped down Tuesday in a surprise move following reported tensions with the bank’s board. Pandit was credited with guiding Citigroup through a nationwide financial crisis that indebted and displaced homeowners, tanked the U.S. economy and led to massive government bailouts, including $45 billion in funds to Citigroup. In April, Citigroup shareholders rejected a $15 million pay package for Pandit in a landmark vote marking the first time stockowners at a financial giant had united to reject a massive compensation package. But the Associated Press reports Pandit still made at least $56.4 million since joining the bank in December of 2007. A second Citigroup executive, President and Chief Operating Officer John Havens, also resigned. Pandit was replaced by Michael Corbat, former CEO of the bank’s Europe, Middle East and Africa division.