| Document And Entity Information - shares | 3 Months Ended | |
| Mar. 31, 2021 | Nov. 04, 2021 | |
| Document Information Line Items | ||
| Entity Registrant Name | Apex 11 Inc. | |
| Document Type | 10-Q | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Common Stock, Shares Outstanding | 21,534,014 | |
| Amendment Flag | false | |
| Entity Central Index Key | 0001578329 | |
| Entity Filer Category | Non-accelerated Filer | |
| Document Period End Date | Mar. 31, 2021 | |
| Document Fiscal Year Focus | 2021 | |
| Document Fiscal Period Focus | Q1 | |
| Entity Small Business | true | |
| Entity Emerging Growth Company | false | |
| Entity Shell Company | true | |
| Entity Interactive Data Current | No |
| CONDENSED BALANCE SHEETS - USD ($) | Mar. 31, 2021 | Dec. 31, 2020 |
| Statement of Financial Position [Abstract] | ||
| ASSETS | $ 0 | $ 0 |
| LIABILITIES | ||
| Accrued expenses | 8,440 | 4,699 |
| Controlling stockholder payable | 11,361 | 0 |
| 19,801 | 4,699 | |
| STOCKHOLDERS’ DEFICIENCY | ||
| Preferred stock; $.0001 par value; 5,000,000 shares authorized; none issued and outstanding | 0 | 0 |
| Common stock; $.0001 par value; 100,000,000 shares authorized; 25,927,384 issued and outstanding, respectively | 2,592 | 2,592 |
| Additional paid-in capital | 87,485 | 87,485 |
| Accumulated deficit | (109,878) | (94,776) |
| Total stockholders’ deficiency | (19,801) | (4,699) |
| Total liabilities and stockholders’ deficiency | $ 0 | $ 0 |
| CONDENSED BALANCE SHEETS (Parentheticals) - $ / shares | Mar. 31, 2021 | Dec. 31, 2020 |
| Statement of Financial Position [Abstract] | ||
| Preferred stock par value (in Dollars per share) | $ 0.0001 | $ 0 |
| Preferred stock, shares authorized | 5,000,000 | 5,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock par value (in Dollars per share) | $ 0.0001 | $ 0.0001 |
| Common stock, shares authorized | 100,000,000 | 100,000,000 |
| Common stock, shares issued | 25,927,384 | 25,927,384 |
| Common stock, shares outstanding | 25,927,384 | 25,927,384 |
| CONDENSED STATEMENTS OF OPERATIONS - USD ($) | 3 Months Ended | |
| Mar. 31, 2021 | Mar. 31, 2020 | |
| OPERATING EXPENSES | ||
| General and administrative | $ 15,102 | $ 1,135 |
| NET LOSS | $ (15,102) | $ (1,135) |
| Basic and diluted loss per common share (in Dollars per share) | $ 0 | $ 0 |
| Basic and diluted weighted-average common shares outstanding (in Shares) | 25,927,384 | 21,534,014 |
| CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIENCY) - USD ($) | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total |
| Balances at Dec. 31, 2019 | $ 2,153 | $ 67,750 | $ (69,903) | |
| Balances (in Shares) at Dec. 31, 2019 | 21,534,014 | |||
| Net loss | (1,135) | $ (1,135) | ||
| Balances at Mar. 31, 2020 | $ 2,153 | 67,750 | (71,038) | (1,135) |
| Balances (in Shares) at Mar. 31, 2020 | 21,534,014 | |||
| Balances at Dec. 31, 2020 | $ 2,592 | 87,485 | (94,776) | $ (4,699) |
| Balances (in Shares) at Dec. 31, 2020 | 25,927,384 | 25,927,384 | ||
| Net loss | (15,102) | $ (15,102) | ||
| Balances at Mar. 31, 2021 | $ 2,592 | $ 87,485 | $ (109,878) | $ (19,801) |
| Balances (in Shares) at Mar. 31, 2021 | 25,927,384 | 25,927,384 |
| CONDENSED STATEMENTS OF CASH FLOWS - USD ($) | 3 Months Ended | |
| Mar. 31, 2021 | Mar. 31, 2020 | |
| OPERATING ACTIVITIES | ||
| Net loss | $ (15,102) | $ (1,135) |
| Changes in operating assets and liabilities: | ||
| Accrued liabilities | 3,741 | 365 |
| Controlling stockholder payable | 11,361 | 770 |
| Cash flows from operating activities | 0 | 0 |
| NET CHANGE IN CASH AND CASH EQUIVALENTS | 0 | 0 |
| CASH AND CASH EQUIVALENTS, Beginning of period | 0 | 0 |
| CASH AND CASH EQUIVALENTS, End of period | $ 0 | $ 0 |
| ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | 3 Months Ended |
| Mar. 31, 2021 | |
| Accounting Policies [Abstract] | |
| Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] | 1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation Organization Use of Estimates Going Concern Subsequent Events |
| CONTROLLING STOCKHOLDER PAYABLE | 3 Months Ended |
| Mar. 31, 2021 | |
| Related Party Transactions [Abstract] | |
| Related Party Transactions Disclosure [Text Block] | 2. CONTROLLING STOCKHOLDER PAYABLE As of March 31, 2021, the Company has a payable of $11,361 to its controlling stockholder related to advances to fund operations. The amount is non-interest bearing and payable on demand. |
| Accounting Policies, by Policy (Policies) | 3 Months Ended |
| Mar. 31, 2021 | |
| Accounting Policies [Abstract] | |
| Basis of Accounting, Policy [Policy Text Block] | Organization |
| Use of Estimates, Policy [Policy Text Block] | Use of Estimates |
| Going Concern, Policy [Policy Textblock} | Going Concern |
| Subsequent Events, Policy [Policy Text Block] | Subsequent Events |
| CONTROLLING STOCKHOLDER PAYABLE (Details) | Mar. 31, 2021USD ($) |
| Related Party Transactions [Abstract] | |
| Due to Officers or Stockholders, Current | $ 11,361 |
