Employee Stock Plans (Fair Value Of Employee Stock Purchase Plan) (Details) (Employee Stock Purchase Plan [Member], USD $)	3 Months Ended	9 Months Ended
Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Employee Stock Purchase Plan [Member]
Expected term (in years)	0.50		0.50
Risk-free interest rate	0.10%		0.20%
Expected volatility	12.60%		11.90%
Expected dividend
Weighted average fair value at grant date	$ 13.09		$ 11.91

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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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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