Additional Financial Information - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Dec. 02, 2016	Dec. 31, 2016	Dec. 31, 2015
Supplemental Cash Flow Information [Abstract]
Accrued interest paid		$ 47	$ 54
Income taxes paid net of refunds		$ 9	$ 6
Special cash dividends payable, date to be paid	Jan. 03, 2017
Special cash dividends	$ 54
Special cash dividends payable, date of record	Dec. 30, 2016