| Form N-CSR Cover | 12 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Trading Symbol | nlft |
| Registrant Name | Northern Lights Fund Trust II |
| Entity Central Index Key | 0001518042 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 12 Months Ended |
| May 31, 2024 USD ($) Integer | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Northern Lights Fund Trust II |
| Entity Central Index Key | 0001518042 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| Trading Symbol | nlft |
| Essential 40 Stock Fund Class I Shares | |
| Shareholder Report [Line Items] | |
| Fund Name | Essential 40 Stock Fund |
| Class Name | Class I |
| Trading Symbol | ESSIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Essential 40 Stock Fund for the period of June 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.essential40stockfund.com 1-844-767-3863 |
| Additional Information Phone Number | 1-844-767-3863 |
| Additional Information Website | www.essential40stockfund.com |
| Expenses [Text Block] | What were the Funds costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $ 70 0.70% |
| Expenses Paid, Amount | $ 70 |
| Expense Ratio, Percent | 0.70% |
| Performance Past Does Not Indicate Future [Text] | The Funds past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | How has the Fund performed since inception? Total Return Based on $10,000 Investment Essential 40 Stock Fund S&P Index Essential 40 Stock Index Total Return 11-06-2014 10000 10000 10000 31-05-2015 9,668 11,056 11,565 31-05-2016 9,283 11,246 12,573 31-05-2017 9,614 13,210 15,667 31-05-2018 10,661 15,110 18,232 31-05-2019 10,548 15,682 18,166 31-05-2020 10,839 17,695 18,775 31-05-2021 15,696 24,829 27,450 31-05-2022 15,837 24,755 27,910 31-05-2023 15,635 25,478 27,635 31-05-2024 19,361 32,660 34,519 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Essential 40 Stock Fund 23.83% 12.92% 6.85% S&P 500 ® 28.19% 15.80% 12.60% Essential 40 Stock 24.90% 13.70% 13.23% The Funds 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. The Essential 40 Stock Index™ Total Return, is an index of companies providing goods and services that are deemed essential to the American economy and way of life. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 63,014,840 |
| Holdings Count | Integer | 42 |
| Advisory Fees Paid, Amount | $ 85,995 |
| Investment Company, Portfolio Turnover | 24% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $63,014,840 Number of Portfolio Holdings 42 Advisory Fee (net of waivers) $85,995 Portfolio Turnover 24% |
| Holdings [Text Block] | Asset Weighting (% of total investments) Consumer Stock 99.2% Money Market Funds 0.8% Top 10 Holdings (% of net assets) Holding Name % of Net Assets Eli Lilly & Company 3.1% Meta Platforms, Inc., A 3.1% Alphabet, Inc., Class A 2.9% Delta Air Lines, Inc. 2.9% Costco Wholesale Corporation 2.9% Chubb Ltd. 2.8% Amazon.com, Inc. 2.8% Waste Management, Inc. 2.8% JPMorgan Chase & Company 2.8% Exxon Mobil Corporation 2.8% |
| Largest Holdings [Text Block] | Top 10 Holdings (% of net assets) Holding Name % of Net Assets Eli Lilly & Company 3.1% Meta Platforms, Inc., A 3.1% Alphabet, Inc., Class A 2.9% Delta Air Lines, Inc. 2.9% Costco Wholesale Corporation 2.9% Chubb Ltd. 2.8% Amazon.com, Inc. 2.8% Waste Management, Inc. 2.8% JPMorgan Chase & Company 2.8% Exxon Mobil Corporation 2.8% |
| Material Fund Change [Text Block] | Material Fund Changes No material changes occured during the year ended May 31, 2024. |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||
| May 31, 2024 | May 31, 2023 | May 31, 2022 | May 31, 2021 | May 31, 2020 | May 31, 2019 | May 31, 2018 | May 31, 2017 | May 31, 2016 | May 31, 2015 | Jun. 11, 2014 | |
| Essential 40 Stock Fund Class I Shares | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Essential 40 Stock Fund | ||||||||||
| Account Value | $ 19,361 | $ 15,635 | $ 15,837 | $ 15,696 | $ 10,839 | $ 10,548 | $ 10,661 | $ 9,614 | $ 9,283 | $ 9,668 | $ 10,000 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P 500® Index | ||||||||||
| Account Value | $ 32,660 | 25,478 | 24,755 | 24,829 | 17,695 | 15,682 | 15,110 | 13,210 | 11,246 | 11,056 | 10,000 |
| Essential 40 Stock Index Total Return | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Essential 40 Stock | ||||||||||
| Account Value | $ 34,519 | $ 27,635 | $ 27,910 | $ 27,450 | $ 18,775 | $ 18,166 | $ 18,232 | $ 15,667 | $ 12,573 | $ 11,565 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| May 31, 2024 | May 31, 2024 | May 31, 2024 | |
| Essential 40 Stock Fund Class I Shares | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Essential 40 Stock Fund | ||
| Average Annual Return, Percent | 23.83% | 12.92% | 6.85% |
| S&P 500 Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P 500® Index | ||
| Average Annual Return, Percent | 28.19% | 15.80% | 12.60% |
| Essential 40 Stock Index Total Return | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Essential 40 Stock | ||
| Average Annual Return, Percent | 24.90% | 13.70% | 13.23% |
| Shareholder Report, Holdings (Details) - Essential 40 Stock Fund Class I Shares | May 31, 2024 |
| Eli Lilly & Company [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Meta Platforms, Inc., A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Delta Air Lines, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Costco Wholesale Corporation [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Chubb Ltd. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Waste Management, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| JPMorgan Chase & Company [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Exxon Mobil Corporation [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19% |
| Industrials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.60% |
| Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.80% |
| Financials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.70% |
| Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10% |
| Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.50% |
| Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| Consumer Discretionary Sector [Member] [Default Label] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.50% |
| Money Market Funds Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| Liabilities in Excess of Other Assets Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | (0.10%) |
| Consumer Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 99.20% |
| Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
