| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | Jun 30, 2025 | 54.6M | 19.1B | 3.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard 500 Index Fund | Jun 30, 2025 | 48.3M | 16.9B | 2.8% | 
                
                        | Fidelity Concord Street Trust-Fidelity 500 Index Fund | Aug 31, 2025 | 21.7M | 7.6B | 1.3% | 
                
                        | iShares Trust-iShares Core S&P 500 ETF | Sep 30, 2025 | 20.8M | 7.3B | 1.2% | 
                
                        | SPDR S&P 500 ETF TRUST | Sep 30, 2025 | 20.3M | 7.1B | 1.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard Growth Index Fund | Jun 30, 2025 | 17.2M | 6.0B | 1.0% | 
                
                        | SELECT SECTOR SPDR TRUST-The Financial Select Sector SPDR Fund | Sep 30, 2025 | 11.9M | 4.2B | 0.7% | 
                
                        | VANGUARD INSTITUTIONAL INDEX FUNDS-Vanguard Institutional Index Fund | Jun 30, 2025 | 10.5M | 3.7B | 0.6% | 
                
                        | VANGUARD SPECIALIZED FUNDS-Vanguard Dividend Appreciation Index Fund | Jul 31, 2025 | 8.6M | 3.0B | 0.5% | 
                
                        | GROWTH FUND OF AMERICA | Sep 30, 2025 | 8.6M | 3.0B | 0.5% |