|
Document and Entity Information (USD $)
|
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2014
|
Feb. 28, 2015
|
Jun. 30, 2014
|
Dec. 31, 2013
|
|
| Common stock, shares authorized | 600,000,000 | 600,000,000 | ||
| Document Type | 10-K | |||
| Amendment Flag | false | |||
| Document Period End Date | Dec. 31, 2014 | |||
| Document Fiscal Year Focus | 2014 | |||
| Document Fiscal Period Focus | FY | |||
| Entity Public Float | $ 94,798,954 | |||
| Entity Registrant Name | NII HOLDINGS INC | |||
| Entity Central Index Key | 0001037016 | |||
| Entity Tax Identification Number | 911671412 | |||
| Current Fiscal Year End Date | --12-31 | |||
| Entity Current Reporting Status | Yes | |||
| Entity Filer Category | Accelerated Filer | |||
| Entity Common Stock, Shares Outstanding | 172,363,259 | |||
| Entity Well-known Seasoned Issuer | No | |||
| Entity Voluntary Filers | No |