Consolidated Statements of Equity (USD $) In Millions, unless otherwise specified	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Beginning balance at Sep. 30, 2009	$ 1,417.8	$ (799.3)	$ 437.3	$ 6.1	$ 1.6
Beginning shares (in Shares) at Sep. 30, 2009						337.2
Shares issued:
Employee stock plans (in Shares)						1.9
Ending balance						0.1
Additional paid-in capital
Employee stock plan shares issued	14.3
Share-based compensation	41.6
RSA forfeitures		(2.7)
Dividends declared			(71.5)
Net income			186.0
Other comprehensive income (loss)				4.6
Change in ownership					(0.5)
Net income (loss)					(1.1)
Unrealized gains (losses) on securities				0.5
Foreign currency translation				10.2
Ending balance at Sep. 30, 2010	1,473.7	(802.0)	551.8	10.7
Ending shares (in Shares) at Sep. 30, 2010						339.1
Shares issued:
Employee stock plans (in Shares)						2.8
Ending balance						0.1
Additional paid-in capital
Employee stock plan shares issued	25.0
Share-based compensation	43.8
Treasury shares acquired		(50.1)				(50.1)
RSA forfeitures		(3.1)
Dividends declared			(71.6)
Net income			283.6
Other comprehensive income (loss)				(19.5)
Change in ownership					2.4
Unrealized gains (losses) on securities				0.1
Foreign currency translation				(8.9)
Ending balance at Sep. 30, 2011	1,542.5	(855.2)	763.8	(8.8)	2.4	1,444.8
Ending shares (in Shares) at Sep. 30, 2011						341.9
Shares issued:
Employee stock plans (in Shares)						1.6
Ending balance						0.1
Additional paid-in capital
Employee stock plan shares issued	9.4
Share-based compensation	33.2
Treasury shares acquired		(475.2)				(475.2)
RSA forfeitures		(2.5)
Dividends declared			(68.7)
Net income			245.9
Other comprehensive income (loss)				13.3
Change in ownership					(2.4)
Foreign currency translation				4.5
Ending balance at Sep. 30, 2012	$ 1,585.1	$ (1,332.9)	$ 941.0	$ 4.5		$ 1,197.8
Ending shares (in Shares) at Sep. 30, 2012						343.5