Share-Based Compensation (Details 1) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding shares, beginning balance | shares	4,523
Granted | shares	1,041
Exercised | shares	(897)
Forfeited | shares	(90)
Cancelled | shares	(3)
Outstanding shares, ending balance | shares	4,574
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Vested or expected to vest, shares | shares	4,397
Exercisable, shares | shares	2,665
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning balance	$ 75.65
Granted	115.62
Exercised	67.18
Forfeited	105.58
Cancelled	84.75
Outstanding, ending balance	85.81
Vested or expected to vest	84.94
Exercisable	$ 70.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, wtd. avg. remaining contractual term	6 years 10 months
Vested or expected to vest, wtd. avg. remaining contractual term	6 years 10 months
Exercisable, wtd. avg. remaining contractual term	5 years 7 months
Outstanding, Aggregate intrinsic value of in-the-money options | $	$ 92.1
Vested or expected, Aggregate intrinsic value of in-the-money options | $	91.5
Exercisable, Aggregate intrinsic value of in-the-money options | $	$ 85.2