Awards Granted to Company Employees and Non-employee Directors Under the 2007 Equity Incentive Compensation Plan (Detail) (USD $)	9 Months Ended
	Jun. 30, 2014
Non-qualified stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	423,149
Weighted-Average Grant Date Fair Value	$ 44.16
Weighted-Average Exercise Price	$ 201.02
Restricted stock awards (RSAs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	584,611
Weighted-Average Grant Date Fair Value	$ 199.32
Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	225,604
Weighted-Average Grant Date Fair Value	$ 197.69
Performance-based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	278,451	[1]
Weighted-Average Grant Date Fair Value	$ 225.46	[1]

[1] Represents the maximum number of performance-based shares which could be earned.