XML 22 R30.htm IDEA: XBRL DOCUMENT v3.2.0.727
Investments (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]      
Trading Securities, Debt $ 69 $ 69 $ 0
Trading Securities, Equity 52 52 0
Trading Securities 121 121 $ 0
Trading Securities, Change in Unrealized Holding Gain (Loss) $ (2) $ (2)