| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | Jun 30, 2025 | 239.0M | 111.2B | 3.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard 500 Index Fund | Jun 30, 2025 | 211.0M | 98.1B | 2.8% | 
                
                        | Fidelity Concord Street Trust-Fidelity 500 Index Fund | Aug 31, 2025 | 94.4M | 43.9B | 1.3% | 
                
                        | iShares Trust-iShares Core S&P 500 ETF | Sep 30, 2025 | 91.2M | 42.4B | 1.2% | 
                
                        | SPDR S&P 500 ETF TRUST | Sep 30, 2025 | 88.6M | 41.2B | 1.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard Growth Index Fund | Jun 30, 2025 | 73.9M | 34.4B | 1.0% | 
                
                        | Invesco QQQ Trust, Series 1 | Sep 30, 2025 | 62.4M | 29.0B | 0.8% | 
                
                        | VANGUARD INSTITUTIONAL INDEX FUNDS-Vanguard Institutional Index Fund | Jun 30, 2025 | 45.6M | 21.2B | 0.6% | 
                
                        | VANGUARD WORLD FUND-Vanguard Information Technology Index Fund | May 31, 2025 | 33.2M | 15.5B | 0.5% | 
                
                        | GROWTH FUND OF AMERICA | Sep 30, 2025 | 32.4M | 15.1B | 0.4% |