Stock-Based Compensation (Fair Value of Stock Compensation) (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2012 years	Apr. 02, 2011 years	Mar. 31, 2012 years	Apr. 02, 2011 years
Employee Stock Purchase Plans
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life in years	0.5	0.5	0.5	0.5
Expected volatility	54.70%	30.20%	52.10%	30.40%
Risk-free interest rate	0.10%	0.20%	0.10%	0.20%
Expected dividends	$ 0	$ 0	$ 0	$ 0
Weighted average fair value per share	$ 14.70	$ 10.06	$ 14.81	$ 9.92
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Restricted stock awards and units vesting period (in years)			3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Restricted stock awards and units vesting period (in years)			3 years
Performance RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility			41.80%
Risk-free interest rate			0.39%
Weighted average fair value of performance stock units			$ 71.59
Performance RSUs | Annual vesting
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Restricted stock awards and units vesting period (in years)			3 years
Performance RSUs | Single vest measurement
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Restricted stock awards and units vesting period (in years)			3 years