v3.25.2
Document and Entity Information
6 Months Ended
Jun. 30, 2025
Document And Entity Information [Abstract]  
Document Type 6-K
Entity Registrant Name NIO Inc.
Entity Central Index Key 0001736541
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2025
Amendment Flag false
Document Period End Date Jun. 30, 2025
Document Fiscal Period Focus Q2