| Cover | 12 Months Ended |
| Dec. 31, 2022 shares | |
| Entity Addresses [Line Items] | |
| Document Type | 20-F/A |
| Amendment Flag | false |
| Document Registration Statement | false |
| Document Annual Report | true |
| Document Transition Report | false |
| Document Shell Company Report | false |
| Document Period End Date | Dec. 31, 2022 |
| Document Fiscal Period Focus | FY |
| Document Fiscal Year Focus | 2022 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-38638 |
| Entity Registrant Name | NIO Inc. |
| Entity Central Index Key | 0001736541 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | Building 20, 56 Antuo Road |
| Entity Address, City or Town | Shanghai |
| Entity Address, Country | CN |
| Entity Address, Postal Zip Code | 201804 |
| Entity Well-known Seasoned Issuer | Yes |
| Entity Voluntary Filers | No |
| Entity Current Reporting Status | Yes |
| Entity Interactive Data Current | Yes |
| Entity Filer Category | Large Accelerated Filer |
| Entity Emerging Growth Company | false |
| Document Accounting Standard | U.S. GAAP |
| Entity Shell Company | false |
| ICFR Auditor Attestation Flag | true |
| Document Financial Statement Error Correction [Flag] | false |
| Auditor Name | PricewaterhouseCoopers Zhong Tian LLP |
| Auditor Location | Shanghai, the People’s Republic of China |
| Auditor Firm ID | 1424 |
| American Depositary Shares | |
| Entity Addresses [Line Items] | |
| Title of 12(b) Security | American depositary shares (each representing one Class A ordinary share), par value US$0.00025 per share |
| Trading Symbol | NIO |
| Security Exchange Name | NYSE |
| Class A Ordinary Shares | |
| Entity Addresses [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares, par value US$0.00025 per share |
| Trading Symbol | NIO |
| Entity Common Stock, Shares Outstanding | 1,570,605,680 |
| Class C Ordinary Shares | |
| Entity Addresses [Line Items] | |
| Entity Common Stock, Shares Outstanding | 148,500,000 |
| Business Contact [Member] | |
| Entity Addresses [Line Items] | |
| Entity Address, Address Line One | Building 20, 56 Antuo Road |
| Entity Address, City or Town | Shanghai |
| Entity Address, Country | CN |
| Entity Address, Postal Zip Code | 201804 |
| City Area Code | 86 |
| Local Phone Number | 21-6908 2018 |
| Contact Personnel Name | Wei Feng |
| Contact Personnel Email Address | ir@nio.com |
