| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | Mar 31, 2025 | 234.9M | 107.7B | 3.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard 500 Index Fund | Mar 31, 2025 | 206.6M | 94.7B | 2.8% | 
                
                        | Fidelity Concord Street Trust-Fidelity 500 Index Fund | Apr 30, 2025 | 93.4M | 42.8B | 1.3% | 
                
                        | SPDR S&P 500 ETF TRUST | Apr 30, 2025 | 89.5M | 41.0B | 1.2% | 
                
                        | iShares Trust-iShares Core S&P 500 ETF | Apr 30, 2025 | 88.1M | 40.4B | 1.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard Growth Index Fund | Mar 31, 2025 | 71.4M | 32.7B | 1.0% | 
                
                        | Invesco QQQ Trust, Series 1 | Apr 30, 2025 | 61.6M | 28.2B | 0.8% | 
                
                        | VANGUARD INSTITUTIONAL INDEX FUNDS-Vanguard Institutional Index Fund | Mar 31, 2025 | 45.8M | 21.0B | 0.6% | 
                
                        | GROWTH FUND OF AMERICA | Mar 31, 2025 | 34.4M | 15.8B | 0.5% | 
                
                        | VANGUARD WORLD FUND-Vanguard Information Technology Index Fund | Feb 28, 2025 | 32.5M | 14.9B | 0.4% |