Supplemental Information (Details) (USD $) In Millions	0 Months Ended	9 Months Ended
	Sep. 20, 2007	Jun. 30, 2011	Jun. 30, 2010
Supplemental Information
Stock repurchase program authorized amount	$ 1,000
Purchase of treasury shares		3.8
Purchase of treasury stock		(350.0)
Shares repurchase authorization remains, amount		$ 299.2