Stockholders' Equity And Stock-Based Compensation (Summary Of Stock Options Issued To Officers, Directors, And Employees Under 2000 Stock Incentive Plan And 2005 Stock Plan) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Jun. 26, 2020 USD ($) $ / shares shares
Shares
Shares, Options outstanding at beginning of period | shares	7,201
Shares, Grants | shares	1,109
Shares, Exercises | shares	(1,334)
Shares, Forfeitures and cancellations | shares	(80)
Shares, Options vested and expected to vest | shares	6,592
Weighted-Average Exercise Price
Weighted Average Exercise Price, Options outstanding at beginning of period	$ 48.03
Weighted Average Exercise Price, Grants (in usd per share)	67.84
Weighted Average Exercise Price, Exercises (in usd per share)	39.53
Weighted Average Exercise Price, Forfeitures and cancellations (in usd per share)	62.24
Weighted Average Exercise Price, Options outstanding at end of period	52.70
Weighted Average Exercise Price, Options vested and expected to vest (in usd per share)	52.10
Weighted Average Exercise Price, Options exercisable (in usd per share)	$ 45.18
Weighted Average Remaining Contractual Life, Options vested and expected to vest at end of period	6 years 3 months 10 days
Weighted Average Remaining Contractual Life, Options exercisable	5 years 3 months 25 days
Aggregate Intrinsic Value, Options outstanding | $	$ 92,659
Aggregate Intrinsic Value, Options vested and expected to vest | $	92,352
Aggregate Intrinsic Value, Options exercisable | $	$ 85,543
Employee Stock Option [Member] | Options Granted From June Two Thousand Eight Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Employee Stock Option [Member] | Options Granted Prior To June 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Employee Stock Option [Member] | Options Granted After June Two Thousand Eight Member [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years