| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | Jun 30, 2025 | 239.0M | 129.5B | 3.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard 500 Index Fund | Jun 30, 2025 | 211.0M | 114.4B | 2.8% | 
                
                        | Fidelity Concord Street Trust-Fidelity 500 Index Fund | Aug 31, 2025 | 94.4M | 51.2B | 1.3% | 
                
                        | iShares Trust-iShares Core S&P 500 ETF | Sep 30, 2025 | 91.2M | 49.4B | 1.2% | 
                
                        | SPDR S&P 500 ETF TRUST | Sep 30, 2025 | 88.6M | 48.0B | 1.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard Growth Index Fund | Jun 30, 2025 | 73.9M | 40.1B | 1.0% | 
                
                        | Invesco QQQ Trust, Series 1 | Sep 30, 2025 | 62.4M | 33.8B | 0.8% | 
                
                        | VANGUARD INSTITUTIONAL INDEX FUNDS-Vanguard Institutional Index Fund | Jun 30, 2025 | 45.6M | 24.7B | 0.6% | 
                
                        | VANGUARD WORLD FUND-Vanguard Information Technology Index Fund | May 31, 2025 | 33.2M | 18.0B | 0.5% | 
                
                        | GROWTH FUND OF AMERICA | Sep 30, 2025 | 32.4M | 17.6B | 0.4% |