XML 37 R27.htm IDEA: XBRL DOCUMENT v3.6.0.2
Investments - Proceeds from Sales of Available-for-sale Securities (Detail) - USD ($)
$ in Millions
3 Months Ended
Nov. 20, 2016
Nov. 22, 2015
Investments, Debt and Equity Securities [Abstract]    
Proceeds $ 32 $ 50