The Cushing MLP & Infrastructure Total Return Fund (SRV) 424B2 24 Oct 24 Prospectus for primary offering Financial data

N-2

N-2 - USD ($)		Oct. 23, 2024	Oct. 16, 2024
Cover [Abstract]
Entity Central Index Key		0001400897
Amendment Flag		false
Document Type		424B2
Entity Registrant Name		NXG Cushing Midstream Energy Fund
Fee Table [Abstract]
Shareholder Transaction Expenses [Table Text Block]		Shareholder Transaction Expenses Sales load ( as a percentage of offering price 3.75% (1) Offering expenses borne by the Fund (as a percentage of offering price) 0.30% (2) Dividend Reinvestment Plan fees (per transaction sales fee) $ 15.00 (3)
Sales Load [Percent]	[1]	3.75%
Dividend Reinvestment and Cash Purchase Fees	[2]	$ 15
Other Transaction Expenses [Abstract]
Other Transaction Expenses [Percent]	[3]	0.30%
Annual Expenses [Table Text Block]		Annual Expenses Percentage of Net Assets (4) Management fees (5)(6) 1.44% Interest expense (7) 2.57% Other expenses (8) 0.37% Total annual expenses 4.38% (1) The Dealer Manager will receive a fee for its financial structuring and soliciting services equal to 3.75% of the Subscription Price per Common Share for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege. The Dealer Manager will reallow to broker-dealers in the selling group to be formed and managed by the Dealer Manager selling fees equal to 2.00% of the Subscription Price per Common Share for each Common Share issued pursuant to the Offer as a result of their selling efforts. In addition, the Dealer Manager will reallow to other broker-dealers that have executed and delivered a soliciting dealer agreement and have solicited the exercise of Rights solicitation fees equal to 0.50% of the Subscription Price per Share for each Common Share issued pursuant to the exercise of Rights as a result of their soliciting efforts, subject to a maximum fee based on the number of Common Shares held by each broker-dealer through The Depository Trust Company (“DTC”) on the Record Date. (2) The fees and expenses of the Offer will be borne by the Fund and indirectly by all of its Common Shareholders, including those who do not exercise their Rights, and will result in a reduction of the Fund’s NAV. Offering expenses borne by the Fund (including the reimbursements described below) are estimated to be approximately $517,950 in the aggregate, or $0.13 per Common Share (assuming the Rights are fully exercised). The Fund has agreed to pay the Dealer Manager up to $150,000 as a partial reimbursement for its expenses incurred in connection with the Offer. Offering expenses will be borne by the Fund and indirectly by all of its Common Shareholders, including those who do not exercise their Rights. (3) There will be no brokerage charges with respect to Common Shares issued directly by the Fund. However, each participant will pay a pro rata share of brokerage commissions incurred in connection with open-market purchases. In addition, participants who request a sale of shares through the Plan Agent are subject to a $15.00 per transaction sales fee and pay a brokerage commission of $0.12 per share sold. The Fund’s transfer agent serves as Plan Agent. Fees paid by the Fund to the transfer agent are included in “Other expenses” below, which are ultimately borne by common shareholders. For additional information, see “Distribution Reinvestment Plan” in the accompanying Prospectus. (4) Based on net assets attributable to Common Shares during the period ended May 31, 2024. (5) The Fund pays the Investment Adviser an annual fee, payable monthly, in an amount equal to 1.25% of the Fund’s average weekly Managed Assets (net assets plus any assets attributable to Financial Leverage). The fee shown above is based upon outstanding Financial Leverage as of May 31, 2024 of 36.48% of the Fund’s Managed Assets (or 41.89% of the Fund’s net assets attributable to Common Shares). If Financial Leverage of more than 36.48% of the Fund’s Managed Assets (or 41.89% of the Fund’s net assets attributable to Common Shares) is used, the management fees shown would be higher. (6) The Investment Adviser has contractually agreed to waive a portion of the management fee in an amount equal to 0.25% of the Fund's Managed Assets through February 1, 2025. The Fund’s annual expenses after giving effect to such management fee waiver are: Annual Expenses Percentage of Net Assets (4) Management fees (2)(3) 1.44% Interest payments on borrowed funds (4) 2.57% Other expenses (5) 0.37% Fee Waiver (0.29)% Total annual expenses 4.09% (7) Based upon the Fund’s outstanding borrowings as of May 31, 2024 of approximately $51.3 million and the borrowing rate on the facility as of May 31, 2024, of 6.13%. (8) Other expenses are estimated based upon those incurred during the period ended May 31, 2024. Other expenses do not include expense related to realized or unrealized investment gains or losses. See “Management of the Fund—Fund Expenses” in the accompanying prospectus.
Management Fees [Percent]	[4],[5],[6]	1.44%
Interest Expenses on Borrowings [Percent]	[4],[7]	2.57%
Other Annual Expenses [Abstract]
Other Annual Expenses [Percent]	[4],[8]	0.37%
Total Annual Expenses [Percent]	[4]	4.38%
Expense Example [Table Text Block]		Example As required by relevant SEC regulations, the following Example illustrates the expenses that you would pay on a $1,000 investment in Common Shares, assuming (1) “Total annual expenses” of 4.38% of net assets attributable to Common Shares, (2) the sales load of $37.50 and estimated offering expenses of $2.92, and (3) a 5% annual return*: 1 Year 3 Years 5 Years 10 Years Total Expenses Incurred $ 81 $ 167 $ 253 $ 474 * The Example should not be considered a representation of future expenses or returns. Actual expenses may be higher or lower than those assumed. Moreover, the Fund’s actual rate of return may be higher or lower than the hypothetical 5% return shown in the Example.
Expense Example, Year 01	[9]	$ 81
Expense Example, Years 1 to 3	[9]	167
Expense Example, Years 1 to 5	[9]	253
Expense Example, Years 1 to 10	[9]	$ 474
Purpose of Fee Table , Note [Text Block]		The following table contains information about the costs and expenses that Common Shareholders will bear directly or indirectly. The table is based on the capital structure of the Fund as of May 31, 2024 (except as noted below) after giving effect to the Offer, assuming that the Offer is fully subscribed resulting in the receipt of net proceeds from the Offer of approximately $40,703,921. If the Fund issues fewer Common Shares in the Offer and the net proceeds to the Fund are less, all other things being equal, the total annual expenses shown would increase. The purpose of the table and the example below is to help you understand the fees and expenses that you, as a holder of Common Shares, would bear directly or indirectly.
Basis of Transaction Fees, Note [Text Block]		as a percentage of offering price
Other Transaction Fees, Note [Text Block]		There will be no brokerage charges with respect to Common Shares issued directly by the Fund. However, each participant will pay a pro rata share of brokerage commissions incurred in connection with open-market purchases. In addition, participants who request a sale of shares through the Plan Agent are subject to a $15.00 per transaction sales fee and pay a brokerage commission of $0.12 per share sold. The Fund’s transfer agent serves as Plan Agent. Fees paid by the Fund to the transfer agent are included in “Other expenses” below, which are ultimately borne by common shareholders. For additional information, see “Distribution Reinvestment Plan” in the accompanying Prospectus.
Other Expenses, Note [Text Block]		Other expenses are estimated based upon those incurred during the period ended May 31, 2024. Other expenses do not include expense related to realized or unrealized investment gains or losses. See “Management of the Fund—Fund Expenses” in the accompanying prospectus.
General Description of Registrant [Abstract]
Share Price			$ 44.39
NAV Per Share			$ 45.69
Latest Premium (Discount) to NAV [Percent]			2.93%
[1]The Dealer Manager will receive a fee for its financial structuring and soliciting services equal to 3.75% of the Subscription Price per Common Share for each Common Share issued pursuant to the exercise of Rights, including the over-subscription privilege. The Dealer Manager will reallow to broker-dealers in the selling group to be formed and managed by the Dealer Manager selling fees equal to 2.00% of the Subscription Price per Common Share for each Common Share issued pursuant to the Offer as a result of their selling efforts. In addition, the Dealer Manager will reallow to other broker-dealers that have executed and delivered a soliciting dealer agreement and have solicited the exercise of Rights solicitation fees equal to 0.50% of the Subscription Price per Share for each Common Share issued pursuant to the exercise of Rights as a result of their soliciting efforts, subject to a maximum fee based on the number of Common Shares held by each broker-dealer through The Depository Trust Company (“DTC”) on the Record Date.[2] There will be no brokerage charges with respect to Common Shares issued directly by the Fund. However, each participant will pay a pro rata share of brokerage commissions incurred in connection with open-market purchases. In addition, participants who request a sale of shares through the Plan Agent are subject to a $15.00 per transaction sales fee and pay a brokerage commission of $0.12 per share sold. The Fund’s transfer agent serves as Plan Agent. Fees paid by the Fund to the transfer agent are included in “Other expenses” below, which are ultimately borne by common shareholders. For additional information, see “Distribution Reinvestment Plan” in the accompanying Prospectus. Other expenses are estimated based upon those incurred during the period ended May 31, 2024. Other expenses do not include expense related to realized or unrealized investment gains or losses. See “Management of the Fund—Fund Expenses” in the accompanying prospectus.