Vanguard S&P Mid-Cap 400 Value Index Fund | ETF

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Mid-Cap 400 Value Index Fund ETF) Vanguard S&P Mid-Cap 400 Value Index Fund	Vanguard S&P Mid-Cap 400 Value Index Fund - ETF Shares
Transaction Fee on Conversion to ETF Shares	0
Transaction Fee On Purchases and Sales	0
Transaction Fee On Reinvested Dividends	0

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Mid-Cap 400 Value Index Fund ETF) Vanguard S&P Mid-Cap 400 Value Index Fund		Vanguard S&P Mid-Cap 400 Value Index Fund - ETF Shares
Management Fees		0.11%
12b-1 Distribution Fee		none
Other Expenses		0.09%
Total Annual Fund Operating Expenses	[1]	0.20%

Expense Example, No Redemption (Vanguard S&P Mid-Cap 400 Value Index Fund ETF) Vanguard S&P Mid-Cap 400 Value Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Mid-Cap 400 Value Index Fund - ETF Shares	20	64	113	255

Vanguard S&P Mid-Cap 400 Value Index Fund | Institutional

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Mid-Cap 400 Value Index Fund Institutional) Vanguard S&P Mid-Cap 400 Value Index Fund	Vanguard S&P Mid-Cap 400 Value Index Fund - Institutional Shares
Sales charge (load) imposed on purchases	none
Purchase Fee	none
Sales charge (load) imposed on reinvested dividends	none
Redemption Fee	none

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Mid-Cap 400 Value Index Fund Institutional) Vanguard S&P Mid-Cap 400 Value Index Fund		Vanguard S&P Mid-Cap 400 Value Index Fund - Institutional Shares
Management Fees		none
12b-1 Distribution Fee		none
Other Expenses		0.08%
Total Annual Fund Operating Expenses	[1]	0.08%

Expense Example, No Redemption (Vanguard S&P Mid-Cap 400 Value Index Fund Institutional) Vanguard S&P Mid-Cap 400 Value Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Mid-Cap 400 Value Index Fund - Institutional Shares	8	26	45	103

Vanguard S&P Small-Cap 600 Growth Index Fund | ETF

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Small-Cap 600 Growth Index Fund ETF) Vanguard S&P Small-Cap 600 Growth Index Fund	Vanguard S&P Small-Cap 600 Growth Index Fund - ETF Shares
Transaction Fee on Conversion to ETF Shares	0
Transaction Fee On Purchases and Sales	0
Transaction Fee On Reinvested Dividends	0

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Small-Cap 600 Growth Index Fund ETF) Vanguard S&P Small-Cap 600 Growth Index Fund		Vanguard S&P Small-Cap 600 Growth Index Fund - ETF Shares
Management Fees		0.04%
12b-1 Distribution Fee		none
Other Expenses		0.16%
Total Annual Fund Operating Expenses	[1]	0.20%

Expense Example, No Redemption (Vanguard S&P Small-Cap 600 Growth Index Fund ETF) Vanguard S&P Small-Cap 600 Growth Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Small-Cap 600 Growth Index Fund - ETF Shares	20	64	113	255

Vanguard S&P Small-Cap 600 Growth Index Fund | Institutional

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Small-Cap 600 Growth Index Fund Institutional) Vanguard S&P Small-Cap 600 Growth Index Fund	Vanguard S&P Small-Cap 600 Growth Index Fund - Institutional Shares
Sales charge (load) imposed on purchases	none
Purchase Fee	none
Sales charge (load) imposed on reinvested dividends	none
Redemption Fee	none

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Small-Cap 600 Growth Index Fund Institutional) Vanguard S&P Small-Cap 600 Growth Index Fund		Vanguard S&P Small-Cap 600 Growth Index Fund - Institutional Shares
Management Fees		0.01%
12b-1 Distribution Fee		none
Other Expenses		0.07%
Total Annual Fund Operating Expenses	[1]	0.08%

Expense Example, No Redemption (Vanguard S&P Small-Cap 600 Growth Index Fund Institutional) Vanguard S&P Small-Cap 600 Growth Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Small-Cap 600 Growth Index Fund - Institutional Shares	8	26	45	103

Vanguard S&P Small-Cap 600 Index Fund | ETF

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Small-Cap 600 Index Fund ETF) Vanguard S&P Small-Cap 600 Index Fund	Vanguard S&P Small-Cap 600 Index Fund - ETF Shares
Transaction Fee on Conversion to ETF Shares	0
Transaction Fee On Purchases and Sales	0
Transaction Fee On Reinvested Dividends	0

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Small-Cap 600 Index Fund ETF) Vanguard S&P Small-Cap 600 Index Fund		Vanguard S&P Small-Cap 600 Index Fund - ETF Shares
Management Fees		0.08%
12b-1 Distribution Fee		none
Other Expenses		0.07%
Total Annual Fund Operating Expenses	[1]	0.15%

Expense Example, No Redemption (Vanguard S&P Small-Cap 600 Index Fund ETF) Vanguard S&P Small-Cap 600 Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Small-Cap 600 Index Fund - ETF Shares	15	48	85	192

Vanguard S&P Small-Cap 600 Index Fund | Institutional

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Small-Cap 600 Index Fund Institutional) Vanguard S&P Small-Cap 600 Index Fund	Vanguard S&P Small-Cap 600 Index Fund - Institutional Shares
Sales charge (load) imposed on purchases	none
Purchase Fee	none
Sales charge (load) imposed on reinvested dividends	none
Redemption Fee	none

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Small-Cap 600 Index Fund Institutional) Vanguard S&P Small-Cap 600 Index Fund		Vanguard S&P Small-Cap 600 Index Fund - Institutional Shares
Management Fees		0.02%
12b-1 Distribution Fee		none
Other Expenses		0.06%
Total Annual Fund Operating Expenses	[1]	0.08%

Expense Example, No Redemption (Vanguard S&P Small-Cap 600 Index Fund Institutional) Vanguard S&P Small-Cap 600 Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Small-Cap 600 Index Fund - Institutional Shares	8	26	45	103

Vanguard S&P Small-Cap 600 Value Index Fund | ETF

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Small-Cap 600 Value Index Fund ETF) Vanguard S&P Small-Cap 600 Value Index Fund	Vanguard S&P Small-Cap 600 Value Index Fund - ETF Shares
Transaction Fee on Conversion to ETF Shares	0
Transaction Fee On Purchases and Sales	0
Transaction Fee On Reinvested Dividends	0

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Small-Cap 600 Value Index Fund ETF) Vanguard S&P Small-Cap 600 Value Index Fund		Vanguard S&P Small-Cap 600 Value Index Fund - ETF Shares
Management Fees		0.06%
12b-1 Distribution Fee		none
Other Expenses		0.14%
Total Annual Fund Operating Expenses	[1]	0.20%

Expense Example, No Redemption (Vanguard S&P Small-Cap 600 Value Index Fund ETF) Vanguard S&P Small-Cap 600 Value Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Small-Cap 600 Value Index Fund - ETF Shares	20	64	113	255

Vanguard S&P Small-Cap 600 Value Index Fund | Institutional

Shareholder Fees (Fees paid directly from your investment)

Shareholder Fees (Vanguard S&P Small-Cap 600 Value Index Fund Institutional) Vanguard S&P Small-Cap 600 Value Index Fund	Vanguard S&P Small-Cap 600 Value Index Fund - Institutional Shares
Sales charge (load) imposed on purchases	none
Purchase Fee	none
Sales charge (load) imposed on reinvested dividends	none
Redemption Fee	none

Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Vanguard S&P Small-Cap 600 Value Index Fund Institutional) Vanguard S&P Small-Cap 600 Value Index Fund		Vanguard S&P Small-Cap 600 Value Index Fund - Institutional Shares
Management Fees		0.01%
12b-1 Distribution Fee		none
Other Expenses		0.07%
Total Annual Fund Operating Expenses	[1]	0.08%

Expense Example, No Redemption (Vanguard S&P Small-Cap 600 Value Index Fund Institutional) Vanguard S&P Small-Cap 600 Value Index Fund (USD $)	1 YEAR	3 YEAR	5 YEAR	10 YEAR
Vanguard S&P Small-Cap 600 Value Index Fund - Institutional Shares	8	26	45	103

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund's benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund's benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund|s benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund's benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund|s benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund|s benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund|s benchmark index no longer includes business development companies.

[1] 1 The expense information shown in the table has been restated to reflect the removal of expenses incurred indirectly by the Fund through its investment in business development companies. The Fund's benchmark index no longer includes business development companies.