[["in millions", "as of december 2013", "as of december 2012"], ["net derivative liabilities under bilateral agreements", "$ 22176", "$ 27885"], ["collateral posted", "18178", "24296"], ["additional collateral or termination payments for a one-notch downgrade", "911", "1534"], ["additional collateral or termination payments for a two-notch downgrade", "2989", "2500"]]