Cion Grosvenor Infrastructure Master Fund, L L C Shares [Member] CION Grosvenor Infrastructure Master Fund, L L C Shares [Member] CION Grosvenor Infrastructure Master Fund, LLC Shares [Member] Closed-End Fund Structure; Liquidity Limited to Periodic Repurchases of Shares [Member] Closed End Fund Structure Liquidity Limited To Periodic Repurchases Of Shares Risk [Member] Closed-End Fund Structure Liquidity Limited to Periodic Repurchases of Shares Risk [Member]. General Investment Risk [Member]. General Investment Risk [Member] General Investment Risks [Member] Management Risk [Member] Management Risk [Member]. Management Risk [Member] Non-Diversified Status [Member] Non Diversified Status Risk [Member] Non-Diversified Status Risk [Member]. Restrictions on Transfers [Member] Restrictions On Transfers Risk [Member] Restrictions on Transfers Risk [Member]. Valuation Risk [Member] Valuation Risk [Member] Valuation Risk [Member]. Class of Stock [Domain] Debt Instrument Name [Domain]