[["$ in millions", "as of december 2012", "as of december 2011"], ["tier 1 capital", "$ 20704", "$ 19251"], ["tier 2 capital", "$ 39", "$ 6"], ["total capital", "$ 20743", "$ 19257"], ["risk-weighted assets", "$ 109669", "$ 112824"], ["tier 1 capital ratio", "18.9% ( 18.9 % )", "17.1% ( 17.1 % )"], ["total capital ratio", "18.9% ( 18.9 % )", "17.1% ( 17.1 % )"], ["tier 1 leverage ratio", "17.6% ( 17.6 % )", "18.5% ( 18.5 % )"]]