Expense Example - Vanguard Explorer Fund	Oct. 31, 2025 USD ($)
Investor Shares
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 40
Expense Example, with Redemption, 3 Years	125
Expense Example, with Redemption, 5 Years	219
Expense Example, with Redemption, 10 Years	493
Admiral Shares
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	29
Expense Example, with Redemption, 3 Years	90
Expense Example, with Redemption, 5 Years	157
Expense Example, with Redemption, 10 Years	$ 356