Annual report pursuant to Section 13 and 15(d)

Investments, Trading Assets (Detail)

v3.6.0.2
Investments, Trading Assets (Detail) - Debt Securities [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Schedule Of Trading Securities And Other Trading Assets [Line Items]      
Trading Securities, Change in Unrealized Holding Gain (Loss) $ (295) $ (152) $ (530)
Unrealized Gain (Loss) on Derivatives $ 300 $ 137 $ 525