What: Shares of Johnson Controls ( JCI -0.07% ) surged more than 5% in midday trading after the company announced a $3 billion increase in its share buyback program Wednesday evening. This increase, combined with the amount left over from the previous buyback program, means Johnson Controls has authorization of up to $3.65 billion. The company has reportedly repurchased $400 million in its current fiscal year already, and will repurchase another $800 million this month through a program with Goldman Sachs.