v3.26.1
N-6
Jul. 10, 2026
Prospectus:  
Document Type N-6
Entity Registrant Name NATIONWIDE VLI SEPARATE ACCOUNT 4
Entity Central Index Key 0001041357
Entity Investment Company Type N-6
Document Period End Date Jul. 10, 2026
Amendment Flag false
Nationwide Innovator Corporate VUL  
Item 2. Key Information [Line Items]  
Item 18. Portfolio Companies (N-6) [Text Block] The following underlying mutual fund is offered as an investment option under the contract or policy. Effective July 29, 2026, the name of the investment option is updated as indicated below:
CURRENT NAME
UPDATED NAME
Vanguard Variable Insurance Fund - Mid-Cap Index Portfolio
Vanguard Variable Insurance Fund - Morningstar Mid-Cap Index
Portfolio
Nationwide Innovator Corporate VUL | Vanguard Variable Insurance Fund - Morningstar Mid-Cap Index Portfolio  
Item 2. Key Information [Line Items]  
Portfolio Company Name [Text Block] Vanguard Variable Insurance Fund - Morningstar Mid-Cap Index Portfolio