YieldMax(R) Universe Fund of Option Income ETFs Underlying YieldMax® ETF Risks [Member] Underlying Reference Asset Risk [Member] Derivatives Risk [Member] Counterparty Risk [Member] Price Participation Risk [Member] Distribution Risk [Member] NAV Erosion Risk Due to Distributions [Member] Call Writing Strategies Risks [Member] Put Writing Strategies Risks [Member] Single Issuer Risk [Member] Concentration Risk [Member] High Portfolio Turnover Risk [Member] Liquidity Risk [Member] Money Market Instrument Risk [Member] Tax Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] Technology Sector Risk [Member] Options Strategy Risks [Member] Economic and Market Risk [Member] ETF Risks [Member] Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] Costs of Buying or Selling Shares [Member] Management Risk [Member] Shares May Trade at Prices Other Than NAV [Member] Trading [Member] Inflation Risk [Member] Newer Fund Risk [Member] Operational Risk [Member] YieldMax(R) Magnificent 7 Fund of Option Income ETFs Underlying Security Risk [Member] Synthetic Covered Call Strategy Risks [Member] YieldMax(R) Universe Fund of Option Income ETFs [Member] YieldMax(R) Magnificent 7 Fund of Option Income ETFs [Member] S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes) YieldMax(R) Universe Fund of Option Income ETFs. YieldMax(R) Universe Fund of Option Income ETFs [Member] YieldMax(R) Magnificent 7 Fund of Option Income ETFs. YieldMax(R) Magnificent 7 Fund of Option Income ETFs [Member] Operational Risk. Newer Fund Risk. Inflation Risk. Trading. Shares May Trade at Prices Other Than NAV. Management Risk. Costs of Buying or Selling Shares. Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. ETF Risks. Economic and Market Risk. Synthetic Covered Call Strategy Risks. Technology Sector Risk. Concentration Risk. Derivatives Risk. Underlying Security Risk. Underlying YieldMax® ETF Risks. Options Strategy Risks. U.S. Government and U.S. Agency Obligations Risk. Liquidity Risk. High Portfolio Turnover Risk. Price Participation Risk. Counterparty Risk. Underlying Reference Asset Risk. Distribution Risk. NAV Erosion Risk Due to Distributions. Call Writing Strategies Risks. Put Writing Strategies Risks. Single Issuer Risk. Money Market Instrument Risk. Tax Risk. S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes).