Vanguard Mid-Cap Growth Fund Expense Example - Investor Prospectus [Member] - Vanguard Mid-Cap Growth Fund - Investor Shares	Oct. 31, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 34
Expense Example, with Redemption, 3 Years	106
Expense Example, with Redemption, 5 Years	185
Expense Example, with Redemption, 10 Years	$ 418

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