Barclays plans to exit some controversial businesses that generate hundreds of millions of pounds in annual revenue and reduce its staff by 3,700 positions as part of a revamp. "Barclays is changing," CEO Antony Jenkins said. "There will be no going back to the old way of doing things. We get it. We are changing the way we do business, we are changing the type of business we do, and we are setting a new course for the future of Barclays."