Retirement Plans - Actuarial Assumptions Used to Determine Net Pension Expense and Periodic Benefit Costs (Detail)	3 Months Ended		6 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Mar. 30, 2014	Mar. 31, 2013
Disclosure Retirement Plans Actuarial Assumptions Used To Determine Net Pension Expense And Periodic Benefit Costs [Abstract]
Discount rate	4.70%	3.70%	4.70%	3.70%
Rate of increase in compensation levels	3.08%	3.08%	3.08%	3.08%
Expected long-term rate of return on assets	6.00%	6.00%	6.00%	6.00%