Quarterly report pursuant to Section 13 or 15(d)

Investments, Trading Assets (Detail)

v3.8.0.1
Investments, Trading Assets (Detail) - Debt Securities [Member] - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Schedule Of Trading Securities And Other Trading Assets [Line Items]    
Trading Securities, Change in Unrealized Holding Gain (Loss) $ 175 $ 217
Unrealized Gain (Loss) on Derivatives $ (149) $ (186)