Employee Stock Plans (Stock Option And RSU Transactions) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 30, 2012
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, September 30, 2012, Stock Option	33.1
Granted, Stock Option	3.1
Options exercised, Stock Option	(6.4)
Forfeited/expired, Stock Option	(0.5)
Options outstanding, December 30, 2012, Stock Option	29.3
Total unrecognized stock-based compensation expense, net of estimated forfeitures, as of December 30, 2012	$ 54.3
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested RSUs, September 30, 2012, RSUs	7.3
Granted, RSUs	3.0
RSUs vested, RSUs	(3.3)
Forfeited/expired, RSUs	(0.3)
Nonvested RSUs, December 30, 2012, RSUs	6.7
Total unrecognized stock-based compensation expense, net of estimated forfeitures, as of December 30, 2012	$ 153.9