Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Detail) - USD ($) $ in Thousands		11 Months Ended	12 Months Ended
		Oct. 02, 2015	Sep. 29, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Segment Earnings	[1]	$ 218,648	$ 264,843	$ 240,639
Identifiable Assets	[2]	2,944,023	3,059,757	2,973,414
US
Segment Reporting Information [Line Items]
Segment Earnings	[1]	121,052	128,081	135,107
Identifiable Assets	[2]	933,631	1,060,471	1,055,567
Canada
Segment Reporting Information [Line Items]
Segment Earnings	[1]	19,133	27,510	7,670
Identifiable Assets	[2]	458,635	498,968	452,466
France
Segment Reporting Information [Line Items]
Segment Earnings	[1]	51,599	65,021	61,381
Identifiable Assets	[2]	747,660	755,361	770,625
United Kingdom
Segment Reporting Information [Line Items]
Segment Earnings	[1]	28,826	22,950	25,646
Identifiable Assets	[2]	501,969	405,423	394,811
All Other Foreign
Segment Reporting Information [Line Items]
Segment Earnings	[1]	(1,962)	21,281	10,835
Identifiable Assets	[2]	$ 302,128	$ 339,534	$ 299,945

[1] Before corporate expense, shown on page 79.

[2] Excludes corporate, shown on page 80.