Cohen & Steers MLP & Energy Opportunities Fund, Inc.

Cohen & Steers MLP & Energy Opportunity Fund, Inc.

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

Cohen & Steers MLP & Energy Opportunity Fund, Inc.

Prospectus Date

rr_ProspectusDate

Apr. 01, 2018

Supplement [Text Block]

csmeofi_SupplementTextBlock

COHEN & STEERS MLP & ENERGY OPPORTUNITY FUND, INC.

CLASS A (MLOAX), CLASS C (MLOCX), CLASS F (MLOFX), CLASS I (MLOIX),

CLASS R (MLORX), CLASS T (MLOTX) AND CLASS Z (MLOZX) SHARES

Supplement dated June 18, 2018 to

Summary Prospectus and Prospectus dated April 1, 2018

Investment Advisory and Fee Limitation Agreements

The Board of Directors of the Fund has approved an amendment to the Fund's Investment Advisory Agreement, reducing the monthly investment advisory fee that the Fund pays to Cohen & Steers Capital Management, Inc., the Fund's investment advisor (the "Advisor"). Effective close of business July 31, 2018, the Fund's investment advisory fee will be reduced from an annual rate of 1.00% of the average daily net assets of the Fund to an annual rate of 0.80% of the average daily net assets of the Fund.

The Board of Directors of the Fund also approved an amendment to the Fund's fee waiver/expense reimbursement agreement, effective close of business July 31, 2018 through June 30, 2020, whereby the Advisor will contractually agree to waive its fee and/or reimburse expenses so that the Fund's total annual fund operating expenses (excluding acquired fund fees and expenses, taxes and extraordinary expenses) do not exceed 1.25% for Class A shares, 1.90% for Class C shares, 0.90% for Class F shares, 0.90% for Class I shares, 1.40% for Class R shares, 1.25% for Class T shares and 0.90% for Class Z shares. Once effective, this contractual agreement can only be amended or terminated prior to its expiration date by agreement of the Fund's Board of Directors and the Advisor, and will terminate automatically in the event of termination of the investment advisory agreement between the Fund and the Advisor.

Accordingly, the following disclosure replaces in its entirety comparable disclosure in the "Fund Fees and Expenses" section of the Summary Prospectus and Prospectus:

This table describes the fees and expenses that you could pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $100,000 in Cohen & Steers funds. You may qualify for sales charge discounts on Class T shares if you invest at least $250,000 in the Fund. More information about these and other discounts is available from your financial intermediary and in "How to Purchase, Exchange and Sell Fund Shares—Purchasing the Class of Fund Shares that is Best for You" in the Fund's prospectus (the "Prospectus"), in the Appendix to the Prospectus titled, "Sales Charge Reductions and Waivers Available Through Certain Intermediaries" (the "Appendix"), "Reducing the Initial Sales Load on Class A Shares" and "Reducing the Initial Sales Charge on Class T Shares" in the Fund's Statement of Additional Information (the "SAI").


	Class A			Class C			Class F⁽¹⁾			Class I			Class R			Class T⁽¹⁾			Class Z
Shareholder Fees (fees paid directly from your investment):
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)		4.50	%		None			None			None			None			2.50	%		None
Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)		None			1.00	%⁽²⁾		None			None			None			None			None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
Management Fee⁽³⁾		0.80	%		0.80	%		0.80	%		0.80	%		0.80	%		0.80	%		0.80	%
Distribution (12b-1) Fees		0.25	%		0.75	%		None			None			0.50	%		0.25	%		None
Other Expenses⁽⁴⁾		0.43	%		0.43	%		0.43	%		0.43	%		0.43	%		0.43	%		0.43	%
Shareholder Service Fee		0.10	%		0.25	%		None			0.05	%⁽⁵⁾		None			0.08	%⁽⁵⁾		None
Total Other Expenses⁽⁴⁾		0.53	%		0.68	%		0.43	%		0.48	%		0.43	%		0.51	%		0.43	%
Total Annual Fund Operating Expenses⁽⁶⁾		1.58	%		2.23	%		1.23	%		1.28	%		1.73	%		1.56	%		1.23	%
Fee Waiver/Expense Reimbursement⁽⁶⁾		(0.33	)%		(0.33	)%		(0.33	)%		(0.38	)%		(0.33	)%		(0.33	)%		(0.33	)%
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)⁽⁶⁾		1.25	%		1.90	%		0.90	%		0.90	%⁽⁷⁾		1.40	%		1.23	%⁽⁷⁾		0.90	%

(1)

Class F shares and Class T shares are currently not available for purchase.

(2)

For Class C shares, the maximum deferred sales charge does not apply after one year.

(3)

Restated to reflect current fees.

(4)

Other expenses reflect contractual changes.

(5)

The maximum shareholder service fee for Class I shares and Class T shares is 0.10%.

(6)

Cohen & Steers Capital Management, Inc., the Fund's investment advisor (the "Advisor"), has contractually agreed to waive its fee and/or reimburse expenses through June 30, 2020 so that the Fund's total annual operating expenses (excluding acquired fund fees and expenses, taxes and extraordinary expenses) do not exceed 1.25% for Class A shares, 1.90% for Class C shares, 0.90% for Class F shares, 0.90% for Class I shares, 1.40% for Class R shares, 1.25% for Class T shares and 0.90% for Class Z shares. This contractual agreement can only be amended or terminated by agreement of the Fund's Board of Directors and the Advisor and will terminate automatically in the event of termination of the investment advisory agreement between the Fund and the Advisor.

(7)

The total annual fund operating expenses for Class F shares and Class T shares are estimated.

EXAMPLE

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Fund's operating expenses remain the same, and that the Advisor did not waive its fee and/or reimburse expenses after June 30, 2020 (through June 30, 2020, expenses are based on the net amount pursuant to the fee waiver/expense reimbursement agreement). Although your actual costs may be higher or lower, based on these assumptions your costs would be:


	1 Year		3 Years		5 Years		10 Years
Class A Shares	$	572	$	863	$	1,211	$	2,189
Class C Shares
Assuming redemption at the end of the period	$	293	$	632	$	1,133	$	2,512
Assuming no redemption at the end of the period	$	193	$	632	$	1,133	$	2,512
Class F Shares	$	92	$	323	$	610	$	1,429
Class I Shares	$	92	$	329	$	627	$	1,476
Class R Shares	$	143	$	479	$	875	$	1,984
Class T Shares	$	372	$	666	$	1,016	$	2,004
Class Z Shares	$	92	$	323	$	619	$	1,429

Expense Narrative [Text Block]

rr_RiskReturnAbstract

Supplement [Text Block]

csmeofi_SupplementTextBlock

COHEN & STEERS MLP & ENERGY OPPORTUNITY FUND, INC.

CLASS A (MLOAX), CLASS C (MLOCX), CLASS F (MLOFX), CLASS I (MLOIX),

CLASS R (MLORX), CLASS T (MLOTX) AND CLASS Z (MLOZX) SHARES

Supplement dated June 18, 2018 to

Summary Prospectus and Prospectus dated April 1, 2018

Investment Advisory and Fee Limitation Agreements

The Board of Directors of the Fund has approved an amendment to the Fund's Investment Advisory Agreement, reducing the monthly investment advisory fee that the Fund pays to Cohen & Steers Capital Management, Inc., the Fund's investment advisor (the "Advisor"). Effective close of business July 31, 2018, the Fund's investment advisory fee will be reduced from an annual rate of 1.00% of the average daily net assets of the Fund to an annual rate of 0.80% of the average daily net assets of the Fund.

The Board of Directors of the Fund also approved an amendment to the Fund's fee waiver/expense reimbursement agreement, effective close of business July 31, 2018 through June 30, 2020, whereby the Advisor will contractually agree to waive its fee and/or reimburse expenses so that the Fund's total annual fund operating expenses (excluding acquired fund fees and expenses, taxes and extraordinary expenses) do not exceed 1.25% for Class A shares, 1.90% for Class C shares, 0.90% for Class F shares, 0.90% for Class I shares, 1.40% for Class R shares, 1.25% for Class T shares and 0.90% for Class Z shares. Once effective, this contractual agreement can only be amended or terminated prior to its expiration date by agreement of the Fund's Board of Directors and the Advisor, and will terminate automatically in the event of termination of the investment advisory agreement between the Fund and the Advisor.

Accordingly, the following disclosure replaces in its entirety comparable disclosure in the "Fund Fees and Expenses" section of the Summary Prospectus and Prospectus:

This table describes the fees and expenses that you could pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $100,000 in Cohen & Steers funds. You may qualify for sales charge discounts on Class T shares if you invest at least $250,000 in the Fund. More information about these and other discounts is available from your financial intermediary and in "How to Purchase, Exchange and Sell Fund Shares—Purchasing the Class of Fund Shares that is Best for You" in the Fund's prospectus (the "Prospectus"), in the Appendix to the Prospectus titled, "Sales Charge Reductions and Waivers Available Through Certain Intermediaries" (the "Appendix"), "Reducing the Initial Sales Load on Class A Shares" and "Reducing the Initial Sales Charge on Class T Shares" in the Fund's Statement of Additional Information (the "SAI").


	Class A			Class C			Class F⁽¹⁾			Class I			Class R			Class T⁽¹⁾			Class Z
Shareholder Fees (fees paid directly from your investment):
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)		4.50	%		None			None			None			None			2.50	%		None
Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)		None			1.00	%⁽²⁾		None			None			None			None			None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
Management Fee⁽³⁾		0.80	%		0.80	%		0.80	%		0.80	%		0.80	%		0.80	%		0.80	%
Distribution (12b-1) Fees		0.25	%		0.75	%		None			None			0.50	%		0.25	%		None
Other Expenses⁽⁴⁾		0.43	%		0.43	%		0.43	%		0.43	%		0.43	%		0.43	%		0.43	%
Shareholder Service Fee		0.10	%		0.25	%		None			0.05	%⁽⁵⁾		None			0.08	%⁽⁵⁾		None
Total Other Expenses⁽⁴⁾		0.53	%		0.68	%		0.43	%		0.48	%		0.43	%		0.51	%		0.43	%
Total Annual Fund Operating Expenses⁽⁶⁾		1.58	%		2.23	%		1.23	%		1.28	%		1.73	%		1.56	%		1.23	%
Fee Waiver/Expense Reimbursement⁽⁶⁾		(0.33	)%		(0.33	)%		(0.33	)%		(0.38	)%		(0.33	)%		(0.33	)%		(0.33	)%
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)⁽⁶⁾		1.25	%		1.90	%		0.90	%		0.90	%⁽⁷⁾		1.40	%		1.23	%⁽⁷⁾		0.90	%

(1)

Class F shares and Class T shares are currently not available for purchase.

(2)

For Class C shares, the maximum deferred sales charge does not apply after one year.

(3)

Restated to reflect current fees.

(4)

Other expenses reflect contractual changes.

(5)

The maximum shareholder service fee for Class I shares and Class T shares is 0.10%.

(6)

Cohen & Steers Capital Management, Inc., the Fund's investment advisor (the "Advisor"), has contractually agreed to waive its fee and/or reimburse expenses through June 30, 2020 so that the Fund's total annual operating expenses (excluding acquired fund fees and expenses, taxes and extraordinary expenses) do not exceed 1.25% for Class A shares, 1.90% for Class C shares, 0.90% for Class F shares, 0.90% for Class I shares, 1.40% for Class R shares, 1.25% for Class T shares and 0.90% for Class Z shares. This contractual agreement can only be amended or terminated by agreement of the Fund's Board of Directors and the Advisor and will terminate automatically in the event of termination of the investment advisory agreement between the Fund and the Advisor.

(7)

The total annual fund operating expenses for Class F shares and Class T shares are estimated.

EXAMPLE

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Fund's operating expenses remain the same, and that the Advisor did not waive its fee and/or reimburse expenses after June 30, 2020 (through June 30, 2020, expenses are based on the net amount pursuant to the fee waiver/expense reimbursement agreement). Although your actual costs may be higher or lower, based on these assumptions your costs would be:


	1 Year		3 Years		5 Years		10 Years
Class A Shares	$	572	$	863	$	1,211	$	2,189
Class C Shares
Assuming redemption at the end of the period	$	293	$	632	$	1,133	$	2,512
Assuming no redemption at the end of the period	$	193	$	632	$	1,133	$	2,512
Class F Shares	$	92	$	323	$	610	$	1,429
Class I Shares	$	92	$	329	$	627	$	1,476
Class R Shares	$	143	$	479	$	875	$	1,984
Class T Shares	$	372	$	666	$	1,016	$	2,004
Class Z Shares	$	92	$	323	$	619	$	1,429

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you could pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $100,000 in Cohen & Steers funds. You may qualify for sales charge discounts on Class T shares if you invest at least $250,000 in the Fund. More information about these and other discounts is available from your financial intermediary and in "How to Purchase, Exchange and Sell Fund Shares—Purchasing the Class of Fund Shares that is Best for You" in the Fund's prospectus (the "Prospectus"), in the Appendix to the Prospectus titled, "Sales Charge Reductions and Waivers Available Through Certain Intermediaries" (the "Appendix"), "Reducing the Initial Sales Load on Class A Shares" and "Reducing the Initial Sales Charge on Class T Shares" in the Fund's Statement of Additional Information (the "SAI").

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment):

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

June 30, 2020

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

For Class C shares, the maximum deferred sales charge does not apply after one year.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on Class A shares if you and your family invest, or agree to invest in the future, at least $100,000 in Cohen & Steers funds. You may qualify for sales charge discounts on Class T shares if you invest at least $250,000 in the Fund.

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect current fees.

Other expenses reflect contractual changes.

Expense Example [Heading]

rr_ExpenseExampleHeading

EXAMPLE

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same, and that the Advisor did not waive its fee and/or reimburse expenses after June 30, 2020 (through June 30, 2020, expenses are based on the net amount pursuant to the fee waiver/expense reimbursement agreement). Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Assuming redemption at the end of the period

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption at the end of the period

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class A

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

^[1]

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_Component1OtherExpensesOverAssets

0.43%

^[2]

rr_Component2OtherExpensesOverAssets

0.10%

rr_OtherExpensesOverAssets

0.53%

^[2]

rr_ExpensesOverAssets

1.58%

^[3]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3]

rr_NetExpensesOverAssets

1.25%

^[3]

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

rr_ExpenseExampleYear01

572

rr_ExpenseExampleYear03

863

rr_ExpenseExampleYear05

1,211

rr_ExpenseExampleYear10

2,189

rr_ExpenseExampleNoRedemptionYear01

572

rr_ExpenseExampleNoRedemptionYear03

863

rr_ExpenseExampleNoRedemptionYear05

1,211

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class C

rr_ExpenseExampleNoRedemptionYear10

$ 2,189

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[4]

rr_ManagementFeesOverAssets

0.80%

^[1]

rr_DistributionAndService12b1FeesOverAssets

0.75%

rr_Component1OtherExpensesOverAssets

0.43%

^[2]

rr_Component2OtherExpensesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.68%

^[2]

rr_ExpensesOverAssets

2.23%

^[3]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3]

rr_NetExpensesOverAssets

1.90%

^[3]

rr_ExpenseExampleYear01

$ 293

rr_ExpenseExampleYear03

632

rr_ExpenseExampleYear05

1,133

rr_ExpenseExampleYear10

2,512

rr_ExpenseExampleNoRedemptionYear01

193

rr_ExpenseExampleNoRedemptionYear03

632

rr_ExpenseExampleNoRedemptionYear05

1,133

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class F

rr_ExpenseExampleNoRedemptionYear10

$ 2,512

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

^[5]

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

^[5]

rr_ManagementFeesOverAssets

0.80%

^[1],[5]

rr_DistributionAndService12b1FeesOverAssets

none

^[5]

rr_Component1OtherExpensesOverAssets

0.43%

^[2],[5]

rr_Component2OtherExpensesOverAssets

none

^[5]

rr_OtherExpensesOverAssets

0.43%

^[2],[5]

rr_ExpensesOverAssets

1.23%

^[3],[5]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3],[5]

rr_NetExpensesOverAssets

0.90%

^[3],[5]

rr_ExpenseExampleYear01

$ 92

rr_ExpenseExampleYear03

323

rr_ExpenseExampleYear05

610

rr_ExpenseExampleYear10

1,429

rr_ExpenseExampleNoRedemptionYear01

92

rr_ExpenseExampleNoRedemptionYear03

323

rr_ExpenseExampleNoRedemptionYear05

610

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class I

rr_ExpenseExampleNoRedemptionYear10

$ 1,429

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

^[1]

rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.43%

^[2]

rr_Component2OtherExpensesOverAssets

0.05%

^[6]

rr_OtherExpensesOverAssets

0.48%

^[2]

rr_ExpensesOverAssets

1.28%

^[3]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.38%)

^[3]

rr_NetExpensesOverAssets

0.90%

^[3],[7]

rr_ExpenseExampleYear01

$ 92

rr_ExpenseExampleYear03

329

rr_ExpenseExampleYear05

627

rr_ExpenseExampleYear10

1,476

rr_ExpenseExampleNoRedemptionYear01

92

rr_ExpenseExampleNoRedemptionYear03

329

rr_ExpenseExampleNoRedemptionYear05

627

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class R

rr_ExpenseExampleNoRedemptionYear10

$ 1,476

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

^[1]

rr_DistributionAndService12b1FeesOverAssets

0.50%

rr_Component1OtherExpensesOverAssets

0.43%

^[2]

rr_Component2OtherExpensesOverAssets

none

rr_OtherExpensesOverAssets

0.43%

^[2]

rr_ExpensesOverAssets

1.73%

^[3]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3]

rr_NetExpensesOverAssets

1.40%

^[3]

rr_ExpenseExampleYear01

$ 143

rr_ExpenseExampleYear03

479

rr_ExpenseExampleYear05

875

rr_ExpenseExampleYear10

1,984

rr_ExpenseExampleNoRedemptionYear01

143

rr_ExpenseExampleNoRedemptionYear03

479

rr_ExpenseExampleNoRedemptionYear05

875

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class T

rr_ExpenseExampleNoRedemptionYear10

$ 1,984

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

^[5]

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

^[5]

rr_ManagementFeesOverAssets

0.80%

^[1],[5]

rr_DistributionAndService12b1FeesOverAssets

0.25%

^[5]

rr_Component1OtherExpensesOverAssets

0.43%

^[2],[5]

rr_Component2OtherExpensesOverAssets

0.08%

^[5],[6]

rr_OtherExpensesOverAssets

0.51%

^[2],[5]

rr_ExpensesOverAssets

1.56%

^[3],[5]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3],[5]

rr_NetExpensesOverAssets

1.23%

^[3],[5],[7]

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

rr_ExpenseExampleYear01

372

rr_ExpenseExampleYear03

666

rr_ExpenseExampleYear05

1,016

rr_ExpenseExampleYear10

2,004

rr_ExpenseExampleNoRedemptionYear01

372

rr_ExpenseExampleNoRedemptionYear03

666

rr_ExpenseExampleNoRedemptionYear05

1,016

Cohen & Steers MLP & Energy Opportunity Fund, Inc. | Class Z

rr_ExpenseExampleNoRedemptionYear10

$ 2,004

Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)

rr_RiskReturnAbstract

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

^[1]

rr_DistributionAndService12b1FeesOverAssets

none

rr_Component1OtherExpensesOverAssets

0.43%

^[2]

rr_Component2OtherExpensesOverAssets

none

rr_OtherExpensesOverAssets

0.43%

^[2]

rr_ExpensesOverAssets

1.23%

^[3]

Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3]

rr_NetExpensesOverAssets

0.90%

^[3]

rr_ExpenseExampleYear01

$ 92

rr_ExpenseExampleYear03

323

rr_ExpenseExampleYear05

619

rr_ExpenseExampleYear10

1,429

rr_ExpenseExampleNoRedemptionYear01

92

rr_ExpenseExampleNoRedemptionYear03

323

rr_ExpenseExampleNoRedemptionYear05

619