Employee Stock Plans (Stock Option And RSU Transactions) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2013
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	3.5
Options exercised, Stock Option	(11.2)
Forfeited/expired, Stock Option	(1.3)
Options outstanding, June 30, 2013, Stock Option	24.1
Total unrecognized stock-based compensation expense, net of estimated forfeitures, as of June 30, 2013	$ 39.9
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	3.1
RSUs vested, RSUs	(3.4)
Forfeited/expired, RSUs	(0.9)
Nonvested RSUs, June 30, 2013, RSUs	6.1
Total unrecognized stock-based compensation expense, net of estimated forfeitures, as of June 30, 2013	$ 104.2