Document and Entity Information
Document and Entity Information - USD ($) $ in Millions | 12 Months Ended | ||
Sep. 30, 2018 | Nov. 30, 2018 | Mar. 29, 2018 | |
Document And Entity Information [Abstract] | |||
Entity Registrant Name | AVAYA HOLDINGS CORP. | ||
Entity Central Index Key | 1,418,100 | ||
Current Fiscal Year End Date | --09-30 | ||
Entity Filer Category | Non-accelerated Filer | ||
Document Type | 10-K/A | ||
Document Period End Date | Sep. 30, 2018 | ||
Document Fiscal Year Focus | 2,018 | ||
Document Fiscal Period Focus | FY | ||
Amendment Flag | true | ||
Amendment Description | To provide the remaining information required by Items 10-14 of Part III of Form 10-K, as we will not be filing our definitive proxy statement within 120 days of such fiscal year end. | ||
Entity Shell Company | false | ||
Entity Common Stock, Shares Outstanding | 110,151,240 | ||
Entity Well-known Seasoned Issuer | No | ||
Entity Public Float | $ 2,459 | ||
Entity Current Reporting Status | Yes | ||
Entity Voluntary Filers | No | ||
Entity Emerging Growth Company | false | ||
Entity Small Business | false |