Net Periodic Pension Cost for Defined Benefit Plans (Detail) - USD ($) $ in Thousands	11 Months Ended	12 Months Ended
	Oct. 02, 2015	Sep. 30, 2016	Oct. 31, 2014
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11,811	$ 12,861	$ 11,367
Interest cost	16,159	18,095	19,387
Expected return on plan assets	(23,872)	(24,491)	(25,999)
Contractual termination	0	0	94
Curtailment	0	0	23
Settlement	3,522	2	0
Amortization of prior service cost	404	487	107
Amortization of actuarial (gain) loss	5,165	6,590	6,052
Net periodic cost (benefit)	13,189	13,544	11,031
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	359	342	489
Interest cost	464	473	685
Expected return on plan assets	0	0	0
Contractual termination	0	0	0
Curtailment	0	0	(1,747)
Settlement	0	0	0
Amortization of prior service cost	(63)	(17)	(151)
Amortization of actuarial (gain) loss	0	0	38
Net periodic cost (benefit)	$ 760	$ 798	$ (686)