Income Taxes (Details) (USD $) In Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Sep. 30, 2009	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Components of income before income taxes
United States									$ 364.3	$ 144.9	$ 64.7
Non-United States									503.3	399.3	209.2
Total	256.1	221.2	203.6	186.7	155.5	133.6	97.3	157.8	867.6	544.2	273.9
Current income tax provision:
United States									51.0	9.7	15.8
Non-United States									75.0	36.7	42.3
State and local									(2.0)	(0.1)	(16.8)
Total current									124.0	46.3	41.3
Deferred income tax provision:
United States									46.6	41.2	11.0
Non-United States									(5.2)	13.1	1.9
State and local									5.1	3.2	1.8
Total deferred									46.5	57.5	14.7
Income tax provision									170.5	103.8	56.0
Total income taxes paid									$ 118.6	$ 100.7	$ 115.2