Compensation Plans (Details) (USD $)	6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Employee Stock Purchase Plan
Compensation Plans
Average expected life	6 months	6 months
Average volatility (as a percent)	55.00%	114.00%
Dividend yield (as a percent)	1.33%
Risk-free interest rate (as a percent)	0.04%	0.14%
Weighted average fair value (in dollars per share)	$ 22.72	$ 10.82
Stock options
Compensation Plans
Average expected life	5 years 6 months	6 years 0 months
Average volatility (as a percent)	75.00%	81.00%
Dividend yield (as a percent)	1.32%
Risk-free interest rate (as a percent)	1.69%	1.02%
Weighted average fair value (in dollars per share)	$ 41.66	$ 31.02
RSUs/RSAs | 2006 Plan | Minimum
Compensation Plans
Vesting period of award	3 years
RSUs/RSAs | 2006 Plan | Maximum
Compensation Plans
Vesting period of award	4 years
PSUs
Compensation Plans
Vesting period of award	3 years