Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2015	Nov. 13, 2015	Mar. 31, 2015
Document and Entity Information
Entity Registrant Name	NBTY INC
Entity Central Index Key	0000070793
Document Type	10-K/A
Document Period End Date	Sep. 30, 2015
Amendment Flag	true
Amendment Description	NBTY, Inc. (the "Company") is filing this amendment No. 1 on Form 10-K/A (this "Amendment") to amend its Annual Report on Form 10-K for the fiscal year ended September 30, 2015, as filed on November 17, 2015 (the "Original Filing"), to revise its consolidated financial statements. During the second quarter of 2016, the Company identified the following errors related to its previously issued financial statements that the Company concluded, based on its evaluation of both quantitative and qualitative factors, were not material to any of its previously issued consolidated financial statements: • In accounting for deferred taxes related to certain of the Company's long-lived assets recorded in connection with the acquisition of the Company by Carlyle, inclusive of intangible assets and property, plant and equipment, the Company did not properly consider the implications of income tax and foreign currency rate changes when recording deferred taxes at the end of each reporting period. The correction of these errors results in the reduction of long-term deferred income tax liabilities of $38,671 and $31,869 as of September 30, 2015 and 2014, respectively, the reduction in Provision (benefit) for income taxes of $7,430 for fiscal 2013 and an increase in Foreign currency translation adjustments of $6,802, $938 and $300, for fiscal 2015, 2014 and 2013, respectively. Accordingly, the Consolidated Balance Sheets, Statements of Operations and Comprehensive Income (Loss) and Statements of Stockholders' Equity have been revised, as applicable, to reflect these changes. The impact of these errors for fiscal periods prior to 2013 but subsequent to the acquisition of the Company by Carlyle was recorded as an adjustment to Shareholder's Equity as of September 30, 2012. • In accounting for the acquisition of the Company by Carlyle, the Company improperly recorded a deferred tax liability related to carryover tax-deductible goodwill resulting in an overstatement of its long-term deferred tax liabilities and goodwill in the amount of $13,930. The Consolidated Balance Sheets have been revised to reflect this change. The correction of these errors had no impact on the total captions as reported in the Consolidated Statements of Cash Flows and no impact on any covenants contained in its debt agreements. Refer to Note 2, Summary of Significant Accounting Policies, in the Notes to the Consolidated Financial Statements set forth in this Amendment for further information relating to this revision. This amended Annual Report on Form 10-K/A sets forth the Original Filing in its entirety; however, pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this amended Annual Report on Form 10-K/A amends and revises the Original Filing only with respect to matters affected by the revision. The following items in the Original Filing have been amended as a result of this revision: • Part II, Item 6. Selected Financial Data • Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations • Part II, Item 8. Financial Statements • Part IV, Item 15. Exhibits (with respect to Exhibits 31 and 32) The Company's Chief Executive Officer and Chief Financial Officer are providing currently dated certifications in connection with this amended Annual Report on Form 10-K/A and various exhibits related to XBRL. These certifications are filed as Exhibits 31 and 32 to this Amendment. This amended Annual Report on Form 10-K/A does not modify or update other disclosures presented in the Original Filing, including the exhibits to the Original Filing, except as identified above. As such, except for the items identified above, this amended Annual Report on Form 10-K/A is as of November 17, 2015, the original filing date, and any forward-looking statements represent management's views as of that date and should be not be assumed to be accurate as of any date thereafter. This amended Annual Report on Form 10-K/A should be read in conjunction with our other filings made with the Securities and Exchange Commission subsequent to November 17, 2015.
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	Yes
Entity Current Reporting Status	No
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		1,000
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY