[["$ in millions", "as of december 2012", "as of december 2011"], ["total level 1 financial assets", "$ 190737", "$ 136780"], ["total level 2 financial assets", "502293", "587416"], ["total level 3 financial assets", "47095", "47937"], ["cash collateral and counterparty netting1", "-101612 ( 101612 )", "-120821 ( 120821 )"], ["total financial assets at fair value", "$ 638513", "$ 651312"], ["total assets", "$ 938555", "$ 923225"], ["total level 3 financial assets as a percentage of total assets", "5.0% ( 5