Label		Element	Value
Vanguard Institutional Target Retirement 2010 Fund | Vanguard Institutional Target Retirement 2010 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[1]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2015 Fund | Vanguard Institutional Target Retirement 2015 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[2]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2020 Fund | Vanguard Institutional Target Retirement 2020 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[3]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2025 Fund | Vanguard Institutional Target Retirement 2025 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[4]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2030 Fund | Vanguard Institutional Target Retirement 2030 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[5]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2035 Fund | Vanguard Institutional Target Retirement 2035 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[6]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2040 Fund | Vanguard Institutional Target Retirement 2040 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[7]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2045 Fund | Vanguard Institutional Target Retirement 2045 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[8]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2050 Fund | Vanguard Institutional Target Retirement 2050 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[9]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2055 Fund | Vanguard Institutional Target Retirement 2055 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[10]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement 2060 Fund | Vanguard Institutional Target Retirement 2060 Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[11]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32
Vanguard Institutional Target Retirement Income Fu | Vanguard Institutional Target Retirement Income Fund - Institutional Shares
Risk/Return:		rr_RiskReturnAbstract
Sales charge (load) imposed on purchases		rr_MaximumCumulativeSalesChargeOverOfferingPrice	none
Purchase Fee		rr_MaximumCumulativeSalesChargeOverOther	none
Sales charge (load) imposed on reinvested dividends		rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee		rr_RedemptionFeeOverRedemption	none
Account Service Fee (for certain fund account balances below $10,000)		rr_MaximumAccountFee	none
12b-1 Distribution Fee		rr_DistributionAndService12b1FeesOverAssets	none
Acquired Fund Fees and Expenses		rr_AcquiredFundFeesAndExpensesOverAssets	0.10%
Total Annual Fund Operating Expenses	[12]	rr_NetExpensesOverAssets	0.10%
1 YEAR		rr_ExpenseExampleNoRedemptionYear01	$ 10
3 YEAR		rr_ExpenseExampleNoRedemptionYear03	$ 32

[1] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[2] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[3] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[4] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[5] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[6] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[7] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[8] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[9] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[10] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[11] The expense information shown in the table reflects estimated amounts for the current fiscal year.

[12] The expense information shown in the table reflects estimated amounts for the current fiscal year.