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Equity-Based Compensation - Weighted Average Assumptions used in Option-Valuation Model (Detail)	12 Months Ended
	Sep. 28, 2013 OptionPlan	Sep. 29, 2012 OptionPlan	Oct. 01, 2011 OptionPlan
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	1.80%	2.00%	3.20%
Expected volatility	26.00%	31.00%	28.00%
Dividend yield	1.60%	1.56%	1.15%
Termination rate	2.70%	2.70%	2.50%
Exercise multiple	1.41	1.41	1.40

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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