[["$ in millions", "year ended december 2014", "year ended december 2013", "year ended december 2012"], ["compensation and benefits", "$ 12691", "$ 12613", "$ 12944"], ["brokerage clearing exchange anddistribution fees", "2501", "2341", "2208"], ["market development", "549", "541", "509"], ["communications and technology", "779", "776", "782"], ["depreciation and amortization", "1337", "1322", "1738"], ["occupancy", "827", "839", "875"], ["professional fees", "902", "930", "867"], ["insurance reserves1",