Share Based Compensation (Details 1) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012
Summary of stock options
Outstanding shares, beginning balance	7,781
Granted, shares	1,388
Exercised, shares	(1,187)
Forfeited, shares	(106)
Cancelled, shares	(3)
Outstanding shares, ending balance	7,873
Vested or expected to vest, shares	7,647
Exercisable, shares	4,781
Outstanding, Weighted avg exercise price beginning balance	$ 51.46
Granted, Weighted Avg Exercise price	$ 74.12
Exercised, Weighted Avg Exercise price	$ 41.58
Forfeited, Weighted Avg Exercise price	$ 65.97
Cancelled, Weighted Avg Exercise price	$ 54.21
Outstanding, Weighted avg exercise price ending balance	$ 56.75
Vested or expected, Weighted Avg Exercise price	$ 56.45
Exercisable, Weighted Avg Exercise price	$ 50.32
Outstanding, Weighted Avg remaining contractual term (years)	6 years 6 months
Vested or expected ,Weighted Avg remaining contractual term (years)	6 years 5 months
Exercisable, Weighted Avg remaining contractual term (years)	5 years 4 months
Outstanding, Aggregate intrinsic value of in the money options	$ 107.6
Vested or expected, Aggregate intrinsic value of in the money options	106.4
Exercisable, Aggregate intrinsic value of in the money options	$ 92.1