| VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund | Mar 31, 2025 | 54.0M | 19.6B | 3.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard 500 Index Fund | Mar 31, 2025 | 47.6M | 17.3B | 2.8% | 
                
                        | Fidelity Concord Street Trust-Fidelity 500 Index Fund | Apr 30, 2025 | 21.6M | 7.9B | 1.3% | 
                
                        | SPDR S&P 500 ETF TRUST | Apr 30, 2025 | 20.8M | 7.6B | 1.2% | 
                
                        | iShares Trust-iShares Core S&P 500 ETF | Apr 30, 2025 | 20.4M | 7.4B | 1.2% | 
                
                        | VANGUARD INDEX FUNDS-Vanguard Growth Index Fund | Mar 31, 2025 | 17.1M | 6.2B | 1% | 
                
                        | SELECT SECTOR SPDR TRUST-The Financial Select Sector SPDR Fund | Apr 30, 2025 | 12.4M | 4.5B | 0.7% | 
                
                        | VANGUARD INSTITUTIONAL INDEX FUNDS-Vanguard Institutional Index Fund | Mar 31, 2025 | 10.6M | 3.9B | 0.6% | 
                
                        | VANGUARD SPECIALIZED FUNDS-Vanguard Dividend Appreciation Index Fund | Jan 31, 2025 | 9.1M | 3.3B | 0.5% | 
                
                        | GROWTH FUND OF AMERICA | Mar 31, 2025 | 8.5M | 3.1B | 0.5% |