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Vanguard SP 500 Growth Index Fund Annual Total Returns
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Institutional Prospectus [Member] | Vanguard SP 500 Growth Index Fund | ETF Shares          
Prospectus [Line Items]          
Annual Return [Percent] 35.95% 29.93% (29.45%) 31.89% 33.38%