| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | ELFUN DIVERSIFIED FUND |
| Entity Central Index Key | 0000821484 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | ELFUN DIVERSIFIED FUND |
| Entity Central Index Key | 0000821484 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000032307 | |
| Shareholder Report [Line Items] | |
| Fund Name | Elfun Diversified Fund |
| Trading Symbol | ELDFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Elfun Diversified Fund (the "Fund") for the period ended June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund, including the Prospectus, Statement of Additional Information, financial statements and other information at www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf |
| Additional Information Phone Number | 1-800-242-0134 |
| Additional Information Website | www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span>" id="sjs-B18"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left;">www.ssga.com/us/en/individual/fund-finder?tab=documents&type=mf</span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? Fund Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Elfun Diversified Fund $16 0.32% |
| Expenses Paid, Amount | $ 16 |
| Expense Ratio, Percent | 0.32% |
| AssetsNet | $ 179,784,308 |
| Holdings Count | Holding | 1,634 |
| InvestmentCompanyPortfolioTurnover | 16% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Statistic Value Total Net Assets $179,784,308 # of Portfolio Holdings 1,634 Portfolio Turnover Rate 16% |
| Holdings [Text Block] | Security Type Asset % Value of Total Net Assets Common Stocks 43.3% Bonds and Notes 28.2% Mutual Funds and Exchange Traded Products 24.7% Short-Term Investments 7.4% U.S. Treasury Obligations 0.6% Corporate Bonds & Notes 0.2% Non-Agency Collateralized Mortgage Obligations 0.2% U.S. Government Agency Obligations 0.2% Agency Mortgage Backed 0.1% Mortgage-Backed Securities 0.1% |
| Largest Holdings [Text Block] | Top Ten Holdings Holdings % Value of Total Net Assets State Street Global All Cap Equity ex-U.S. Index Portfolio 24.7% Microsoft Corp. 3.1% NVIDIA Corp. 2.9% Apple, Inc. 2.9% U.S. Treasury Notes, 0.75%, due 01/31/28 2.2% Alphabet, Inc. 1.9% Amazon.com, Inc. 1.7% U.S. Treasury Notes, 3.88%, due 08/15/33 1.5% Uniform Mortgage-Backed Security, TBA, 2.50%, due 07/01/54 1.3% U.S. Treasury Notes, 4.25%, due 12/31/25 1.1% |
| Shareholder Report, Holdings (Details) - C000032307 | Jun. 30, 2024 |
| State Street Global All Cap Equity ex-U.S. Index PortfolioFR_85749T764 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.70% |
| Microsoft Corp.FR_594918104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| NVIDIA Corp.FR_67066G104 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Apple, Inc.FR_037833100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| U.S. Treasury NotesFR_91282CBJ9 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Alphabet, Inc.FR_02079K305 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Amazon.com, Inc.FR_023135106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| U.S. Treasury NotesFR_91282CHT1 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Uniform Mortgage-Backed Security, TBAFR_01F022675 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| U.S. Treasury NotesFR_91282CJS1 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 43.30% |
| AssetBonds and Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.20% |
| AssetMutual Funds and Exchange Traded Products | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 24.70% |
| AssetShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| AssetU.S. Treasury Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| AssetCorporate Bonds & Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| AssetNon-Agency Collateralized Mortgage Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| AssetU.S. Government Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| AssetAgency Mortgage Backed | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| AssetMortgage-Backed Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
