(Vanguard Target Retirement Income Fund Retail) (Vanguard Target Retirement Income Fund, Vanguard Target Retirement Income Fund - Investor Shares)	18 Months Ended
Mar. 31, 2013
Vanguard Target Retirement Income Fund \| Vanguard Target Retirement Income Fund - Investor Shares
Risk/Return:
Acquired Fund Fees and Expenses	0.16%

Total Annual Fund Operating Expenses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Form

-Number N-1A

-Chapter A

-Section 3

-Subsection table

-Paragraph 1

-Subparagraph 11

Name:	rr_AcquiredFundFeesAndExpensesOverAssets
Namespace Prefix:	rr_
Data Type:	rr:NonNegativePure4Type
Balance Type:	na
Period Type:	duration