Global banking major Citigroup will reduce 10 per cent of its workforce, or about 20,000 employees, in the next two years in a major corporate overhaul.About 20,000 employees will be let go over the "medium term", Citigroup said after presenting fourth-quarter earnings late on Friday.Citigroup CEO Jane Fraser hailed 2024 as a "turning point" for the US banking group, reports CNBC.