Label

Element

Value

Prospectus [Line Items]

rr_ProspectusLineItems

Document Type

dei_DocumentType

497

Document Period End Date

dei_DocumentPeriodEndDate

Dec. 22, 2023

Entity Registrant Name

dei_EntityRegistrantName

First Trust Exchange-Traded Fund VI

Entity Central Index Key

dei_EntityCentralIndexKey

0001552740

Entity Inv Company Type

dei_EntityInvCompanyType

N-1A

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Dec. 22, 2023

Document Effective Date

dei_DocumentEffectiveDate

Dec. 22, 2023

First Trust International Developed Capital Strength ETF

Prospectus [Line Items]

rr_ProspectusLineItems

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

1. Notwithstanding anything to the contrary in the Fund’s prospectus, effective as of the date set forth above, the final sentence of the section entitled “Principal Investment Strategies” is hereby deleted in its entirety.

2. Notwithstanding anything to the contrary in the Fund’s prospectus, effective as of the date set forth above, the risk factor “Non-Diversification Risk” set forth in the section entitled “Principal Risks” is hereby deleted in its entirety.

3. Notwithstanding anything to the contrary in the Fund’s prospectus, effective as of the date set forth above, the risk factor “Non-Diversification Risk” set forth in the section entitled “Risks of Investing in the Fund – Principal Risks” is hereby deleted in its entirety.