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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