| Shareholder Report | 6 Months Ended |
| May 31, 2024 USD ($) holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | EA Series Trust |
| Entity Central Index Key | 0001592900 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| C000246579 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Alpha Blue Capital US Small-Mid Cap Dynamic ETF |
| Class Name | Alpha Blue Capital US Small-Mid Cap Dynamic ETF |
| Trading Symbol | ABCS |
| Security Exchange Name | NASDAQ |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Alpha Blue Capital US Small-Mid Cap Dynamic ETF (the “Fund”) for the period of December 18, 2023 to May 31, 2024 (“the Period”). |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information Phone Number | (215) 882-9983 |
| Additional Information Website | www.alphabluecapitalabcs.com |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE PERIOD? (based on a hypothetical $10,000 investment) COST OF $10,000 INVESTMENT COST PAID AS A PERCENTAGE OF $10,000 INVESTMENT $12 0.25% |
| Expenses Paid, Amount | $ 12 |
| Expense Ratio, Percent | 0.25% |
| Factors Affecting Performance [Text Block] | WHAT FACTORS INFLUENCED PERFORMANCE FOR THE PERIOD? The Fund returned 6.80% for the Period, outperforming the Bloomberg US 2500 Index’s return of 6.01%, while lagging the Bloomberg US Aggregate Equity Index’s return of 11.01%. U.S. equity market returns were led by very strong investment performance of a few of the very largest (by market capitalization) information technology stocks. The Fund’s overall stock selection was the primary driver of outperformance as well as the outperformance of the Fund’s holdings in the Vanguard Mid-Cap ETF and Vanguard Mid-Cap Value ETF. On a look-through basis of the ETFs to the individual stock level, the Fund’s strongest absolute return sectors were Information Technology and Energy, while Health Care and Consumer Discretionary lagged. Stock selection attribution contribution was greatest in Financials and Information Technology, with stock selection attribution detracting in Health Care and Consumer Discretionary. The Fund is well diversified with overall attractive valuation, sound fundamentals, quality and positive business momentum. |
| Line Graph [Table Text Block] | PERFORMANCE OF HYPOTHETICAL |
| Average Annual Return [Table Text Block] | AVERAGE CUMULATIVE TOTAL RETURNS Since Inception (12/18/2023) Alpha Blue Capital US Small-Mid Cap Dynamic ETF - NAV 6.80% Alpha Blue Capital US Small-Mid Cap Dynamic ETF - Market 6.80% Bloomberg US Aggregate Equity Index 11.01% Bloomberg US 2500 Index 6.01% The Fund’s past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. Visit www.alphabluecapitalabcs.com for more recent performance information. |
| Performance Inception Date | Dec. 18, 2023 |
| Net Assets | $ 9,561,393 |
| Holdings Count | holding | 106 |
| Advisory Fees Paid, Amount | $ 14,073 |
| Investment Company, Portfolio Turnover | 17% |
| Additional Fund Statistics [Text Block] | KEY FUND STATISTICS (as of Period End) Net Assets $9,561,393 Advisory Fees $14,073 Portfolio Turnover Rate* 17% Fees Waived and/or Expenses Reimbursed $(5,277) # of Portfolio Holdings 106 Net Advisory Fees Paid $8,796 *Portfolio turnover is not annualized and is calculated without regard to short-term securities having a maturity of less than one year. Excludes impact of in-kind transactions. |
| Holdings [Text Block] | SECTOR WEIGHTING Financials 23.2% Information Technology 13.2% Health Care 12.0% Consumer Discretionary 11.8% Industrials 10.9% Energy 8.5% Materials 5.5% Real Estate 5.2% Consumer Staples 4.7% Utilities 1.9% Communication Services 1.7% Money Market Funds 1.4% Investments Purchased with Proceeds from Securities Lending 0.3% Liabilities in Excess of Other Assets (0.3)% Total 100.0% (1) Cash, cash equivalents and other assets in excess of liabilities. ASSET WEIGHTING (as a % of Net Assets) |
