YieldMax® Memory and Storage Portfolio Option Income ETF Memory and Storage Industry Risks [Member] Derivatives Risk [Member] Options Contracts [Member] Swap Agreements [Member] Counterparty Risk [Member] Call Strategy Risk [Member] Distribution Risk [Member] NAV Erosion Risk Due to Distributions [Member] Equity Market Risk [Member] Concentration Risk [Member] Economic and Market Risk [Member] ETF Risks [Member] Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] Cash Redemption Risk [Member] Costs of Buying or Selling Shares [Member] Shares May Trade at Prices Other Than NAV [Member] Trading [Member] Foreign Securities Risk [Member] Emerging Markets Risk [Member] Depositary Receipt Risk [Member] Foreign Currency Risk [Member] High Portfolio Turnover Risk [Member] Inflation Risk [Member] Market Capitalization Risk [Member] Large-Capitalization Investing [Member] Mid-Capitalization Investing [Member] Small-Capitalization Investing [Member] Other Investment Companies Risk [Member] Money Market Instrument Risk [Member] New Fund Risk [Member] Operational Risk [Member] Tax Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] YieldMax® Memory and Storage Portfolio Option Income ETF [Member] YieldMax® Memory and Storage Portfolio Option Income ETF YieldMax® Memory and Storage Portfolio Option Income ETF U.S. Government and U.S. Agency Obligations Risk. Tax Risk. Operational Risk. New Fund Risk. Money Market Instrument Risk. Other Investment Companies Risk. Small-Capitalization Investing. Mid-Capitalization Investing. Large-Capitalization Investing. Market Capitalization Risk. Inflation Risk. High Portfolio Turnover Risk. Foreign Currency Risk. Depositary Receipt Risk. Emerging Markets Risk. Foreign Securities Risk. Trading. Shares May Trade at Prices Other Than NAV. Costs of Buying or Selling Shares. Cash Redemption Risk. Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. ETF Risks. Economic and Market Risk. Concentration Risk. Equity Market Risk. NAV Erosion Risk Due to Distributions. Distribution Risk. Call Strategy Risk. Counterparty Risk. Swap Agreements. Options Contracts. Derivatives Risk. Memory and Storage Industry Risks.