Basis of Presentation - Revision of Consolidated Statements of Income and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements of Income and Comprehensive Income (Loss)
Cost of sales (See Note 3)	$ 443,144	$ 448,887
Total costs and expenses	759,949	733,953
Income from operations	42,041	91,818
Income from operations before income taxes	5,743	55,716
(Benefit) provision for income taxes	(2,735)	19,809
Net income (loss)	8,478	35,907
Net (loss) income attributable to NBTY, Inc.	8,617	35,907
Foreign currency translation adjustment, net of taxes of ($997) and $396, respectively	(18,746)	(26,830)
Foreign currency translation adjustment, tax expense (benefit)	(997)	396
Total other comprehensive (loss) income, net of tax	(18,746)	(26,109)
Comprehensive loss	(10,268)	9,798
Comprehensive (loss) income	(9,555)	9,798
As Reported
Consolidated Statements of Income and Comprehensive Income (Loss)
Cost of sales (See Note 3)	443,144	445,180
Total costs and expenses	759,949	730,246
Income from operations	42,041	95,525
Income from operations before income taxes	5,743	59,423
(Benefit) provision for income taxes	1,945	21,232
Net income (loss)	3,798	38,191
Net (loss) income attributable to NBTY, Inc.	3,937	38,191
Foreign currency translation adjustment, net of taxes of ($997) and $396, respectively	(20,630)	(30,307)
Total other comprehensive (loss) income, net of tax	(20,630)	(29,586)
Comprehensive loss	(16,832)	8,606
Comprehensive (loss) income	(16,119)	8,606
Adjustment
Consolidated Statements of Income and Comprehensive Income (Loss)
Cost of sales (See Note 3)		3,707
Total costs and expenses		3,707
Income from operations		(3,707)
Income from operations before income taxes		(3,707)
(Benefit) provision for income taxes	(4,680)	(1,423)
Net income (loss)	4,680	(2,284)
Net (loss) income attributable to NBTY, Inc.	4,680	(2,284)
Foreign currency translation adjustment, net of taxes of ($997) and $396, respectively	1,884	3,477
Total other comprehensive (loss) income, net of tax	1,884	3,477
Comprehensive loss	6,564	1,192
Comprehensive (loss) income	$ 6,564	$ 1,192