Pension and Other Benefit Programs - Long-Term Rate of Return on Plan Assets (Detail)	12 Months Ended
	Sep. 27, 2014
Equity Investments | Minimum
Defined Benefit Plan Disclosure [Line Items]
Long term rate of return on assets	7.00%
Equity Investments | Maximum
Defined Benefit Plan Disclosure [Line Items]
Long term rate of return on assets	11.00%
Debt Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Long term rate of return on assets	3.00%
Debt Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Long term rate of return on assets	5.00%
Alternative Investments | Minimum
Defined Benefit Plan Disclosure [Line Items]
Long term rate of return on assets	8.00%
Alternative Investments | Maximum
Defined Benefit Plan Disclosure [Line Items]
Long term rate of return on assets	12.00%