Share-Based Compensation (Details 1) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding shares, beginning balance | shares	4,574
Granted | shares	1,167
Exercised | shares	(556)
Forfeited | shares	(75)
Cancelled | shares	(12)
Outstanding shares, ending balance | shares	5,098
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Vested or expected to vest, shares | shares	4,918
Exercisable, shares | shares	3,049
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning balance | $ / shares	$ 85.81
Granted | $ / shares	104.36
Exercised | $ / shares	74.17
Forfeited | $ / shares	107.69
Cancelled | $ / shares	105.49
Outstanding, ending balance | $ / shares	90.96
Vested or expected to vest | $ / shares	90.31
Exercisable | $ / shares	$ 79.15
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, wtd. avg. remaining contractual term	6 years 8 months
Vested or expected to vest, wtd. avg. remaining contractual term	6 years 7 months
Exercisable, wtd. avg. remaining contractual term	5 years 5 months
Outstanding, Aggregate intrinsic value of in-the-money options | $	$ 160.0
Vested or expected, Aggregate intrinsic value of in-the-money options | $	157.5
Exercisable, Aggregate intrinsic value of in-the-money options | $	$ 131.7