v3.26.1
Average Annual Total Returns
 12 Months Ended 23 Months Ended 24 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.88% [1] 20.23% [2] 21.91% [1]
YieldMax(R) Universe Fund of Option Income ETFs [Member]      
Prospectus [Line Items]      
Average Annual Return, Percent 6.43%   15.96%
Performance Inception Date     Jan. 16, 2024
YieldMax(R) Universe Fund of Option Income ETFs [Member] | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent (5.95%)   4.00%
YieldMax(R) Universe Fund of Option Income ETFs [Member] | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 3.80%   7.72%
YieldMax(R) Magnificent 7 Fund of Option Income ETFs [Member]      
Prospectus [Line Items]      
Average Annual Return, Percent 18.78% 27.96%  
Performance Inception Date   Jan. 29, 2024  
YieldMax(R) Magnificent 7 Fund of Option Income ETFs [Member] | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 6.86% 16.22%  
YieldMax(R) Magnificent 7 Fund of Option Income ETFs [Member] | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 10.32% 16.09%  
[1] The S&P 500® Total Return Index is a free-float market capitalization-weighted index of 500 of the largest U.S. companies. The index is calculated on a total return basis with dividends reinvested.
[2] The S&P 500® Total Return Index is a free-float market capitalization-weighted index of 500 of the largest U.S. companies. The index is calculated on a total return basis with dividends reinvested.