Quarterly report pursuant to Section 13 or 15(d)

Investments, Trading Assets (Detail)

v3.10.0.1
Investments, Trading Assets (Detail) - Debt Securities [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Schedule Of Trading Securities And Other Trading Assets [Line Items]        
Trading Securities, Change in Unrealized Holding Gain (Loss) $ (326) $ 321 $ (214) $ 483
Unrealized Gain (Loss) on Derivatives $ 316 $ (311) $ 221 $ (446)