Segment Information (Details 5)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010 Predecessor
Segment reporting information
Percentage of net sales that were denominated in currencies other than U.S. dollars	31.00%	32.00%	29.00%
Foreign subsidiaries that accounted for the specified percentages of assets and total liabilities
Total Assets (as a percent)	25.00%	24.00%
Total Liabilities (as a percent)	5.00%	4.00%