485BPOS

As filed with the Securities and Exchange Commission on May 11, 2018

File Nos. 333-165034

811-22392

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER
THE SECURITIES ACT OF 1933	☒
PRE-EFFECTIVE AMENDMENT NO.	☐
POST-EFFECTIVE AMENDMENT NO. 20	☒
And

REGISTRATION STATEMENT

UNDER
THE INVESTMENT COMPANY ACT OF 1940	☒
AMENDMENT NO. 21	☒

COHEN & STEERS

PREFERRED SECURITIES

AND INCOME FUND, INC.

(Exact Name Of Registrant As Specified In Charter)

280 Park Avenue, New York, NY 10017

(Address Of Principal Executive Office)

Registrant’s Telephone Number, including Area Code: (212) 832-3232

Dana DeVivo

Cohen & Steers Capital Management, Inc.

280 Park Avenue

New York, New York 10017

(Name And Address Of Agent Of Service Of Process)

With copies to:

Michael G. Doherty, Esq.

Ropes & Gray LLP

1211 Avenue of the Americas

New York, New York 10036

Approximate Date of Proposed Public Offering : As soon as practicable after the effective date of this registration statement.

It is proposed that this filing will become effective (check appropriate box):

☒ immediately upon filing pursuant to paragraph (b)

☐ on (date) pursuant to paragraph (b)

☐ 60 days after filing pursuant to paragraph (a)(1)

☐ on (date) pursuant to paragraph (a)(1)

☐ 75 days after filing pursuant to paragraph (a)(2)

☐ on (date) pursuant to paragraph (a)(2) of rule 485

If appropriate, check the following box:

☐ this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act and the 1940 Act, the Registrant certifies that it meets all the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York, on the 11^th day of May, 2018.

                    COHEN & STEERS PREFERRED SECURITIES AND INCOME FUND,  INC.

By:	/s/ ADAM M. DERECHIN
	Adam M. Derechin
	President and CEO

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

SIGNATURE		TITLE	DATE
By:	/s/ ADAM M. DERECHIN	President and Chief Executive Officer	May 11, 2018
	(ADAM M. DERECHIN)	(Principal Executive Officer)
By:	/s/ JAMES GIALLANZA	Chief Financial Officer (Principal Financial Officer)	May 11, 2018
	(JAMES GIALLANZA)
	*	Chairman and Director	May 11, 2018
	(ROBERT H. STEERS)
	*	Director	May 11, 2018
	(JOSEPH M. HARVEY)
	*	Director	May 11, 2018
	(MICHAEL G. CLARK)
	*	Director	May 11, 2018
	(GEORGE GROSSMAN)
	*	Director	May 11, 2018
	(DEAN JUNKANS)
	*	Director	May 11, 2018
	(GERALD J. MAGINNIS)
	*	Director	May 11, 2018
	(JANE F. MAGPIONG)
	*	Director	May 11, 2018
	(DAPHNE L. RICHARDS)
	*	Director	May 11, 2018
	(FRANK K. ROSS)
	*	Director	May 11, 2018
	(C. EDWARD WARD, JR.)

*By:	/s/ DANA DEVIVO	May 11, 2018
	Dana DeVivo
	(ATTORNEY-IN-FACT)

EXHIBIT INDEX

Index No.	Description of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2017
Registrant Name	dei_EntityRegistrantName	COHEN & STEERS PREFERRED SECURITIES & INCOME FUND, INC.
Central Index Key	dei_EntityCentralIndexKey	0001484750
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 27, 2018
Document Effective Date	dei_DocumentEffectiveDate	Apr. 27, 2018
Prospectus Date	rr_ProspectusDate	May 01, 2018

XML

Cohen & Steers Preferred Securities & Income Fund, Inc.

COHEN & STEERS PREFERRED SECURITIES AND INCOME FUND, INC.

INVESTMENT OBJECTIVE

The investment objective of Cohen & Steers Preferred Securities and Income Fund, Inc. (the “Fund”) is to seek total return (high current income and capital appreciation).

FUND FEES AND EXPENSES

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 (when made available) 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 this Prospectus titled “Sales Charge Reductions and Waivers Available Through Certain Intermediaries” (the “Appendix”), “Reducing the Initial Sales Charge 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 T shares are currently not available for purchase.

Shareholder Fees (fees paid directly from your investment):

Shareholder Fees - Cohen & Steers Preferred Securities & Income Fund, Inc.	Class A	Class C		Class F	Class I	Class R	Class T	[1]	Class Z
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	3.75%	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):

Annual Fund Operating Expenses - Cohen & Steers Preferred Securities & Income Fund, Inc.		Class A	Class C	Class F	Class I		Class R	Class T	[1]	Class Z
Management Fee		0.70%	0.70%	0.70%	0.70%		0.70%	0.70%		0.70%
Distribution (12b-1) Fees		0.25%	0.75%	none	none		0.50%	0.25%		none
Other Expenses		0.11%	0.11%	0.11%	0.11%		0.11%	0.11%		0.11%
Shareholder Service Fee		0.10%	0.25%	none	0.06%	[2]	none	0.08%	[2]	none
Total Other Expenses		0.21%	0.36%	0.11%	0.17%		0.11%	0.19%		0.11%
Total Annual Fund Operating Expenses	[3]	1.16%	1.81%	0.81%	0.87%		1.31%	1.14%		0.81%
Fee Waiver/Expense Reimbursement	[3]	none	none	none	(0.02%)		none	none		none
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	[3]	1.16%	1.81%	0.81%	0.85%		1.31%	1.14%	[4]	0.81%

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, 2019 (through June 30, 2019, 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:

Assuming redemption at the end of the period

Expense Example - Cohen & Steers Preferred Securities & Income Fund, Inc. - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A Shares	489	730	989	1,731
Class C Shares	284	569	980	2,127
Class F Shares	83	259	450	1,002
Class I Shares	87	275	480	1,070
Class R Shares	133	415	718	1,579
Class T Shares	363	603	862	1,601
Class Z Shares	83	259	450	1,002

Assuming no redemption at the end of the period

Expense Example, No Redemption - Cohen & Steers Preferred Securities & Income Fund, Inc. - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A Shares	489	730	989	1,731
Class C Shares	184	569	980	2,127
Class F Shares	83	259	450	1,002
Class I Shares	87	275	480	1,070
Class R Shares	133	415	718	1,579
Class T Shares	363	603	862	1,601
Class Z Shares	83	259	450	1,002

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the Fund’s most recent fiscal year, the Fund’s portfolio turnover rate was 36% of the average value of its portfolio.

PRINCIPAL INVESTMENT STRATEGIES

The Fund pursues its objective primarily by investing in issues of preferred and debt securities believed to be undervalued relative to credit quality and other investment characteristics. In making this determination, the Advisor evaluates the fundamental characteristics of an issuer, including an issuer’s creditworthiness, and also takes into account prevailing market factors. In analyzing credit quality, the Advisor considers not only fundamental analysis, but also an issuer’s corporate and capital structure and the placement of the preferred or debt securities within that structure. In evaluating relative value, the Advisor also takes into account call, conversion and other structural security features, in addition to such factors as the likely directions of credit ratings and relative value versus other income security classes.

Under normal market conditions, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in a portfolio of preferred and debt securities issued by U.S. and non-U.S. companies, including traditional preferred securities; hybrid preferred securities that have investment and economic characteristics of both preferred stock and debt securities; floating rate preferred securities; corporate debt securities; convertible securities; contingent capital securities (“CoCos”); and securities of other open-end, closed-end or exchange-traded funds (“ETFs”) that invest primarily in preferred and/or debt securities as described herein. To the extent the Fund invests in securities of other open-end, closed-end or ETFs, the Fund will consider the investments of these funds, to the extent known by the Fund, in determining compliance with this policy. The Fund may also invest in certain restricted securities including securities that are only eligible for resale pursuant to Rule 144A under the Securities Act of 1933 (the “Securities Act”) (referred to as Rule 144A Securities) and securities of U.S. and non-U.S. issuers that are issued through private offerings without registration with the Securities and Exchange Commission (the “SEC”) pursuant to Regulation S under the Securities Act.

The Fund also will invest at least 25% of its net assets in the financials sector, which is comprised of the bank, diversified financials, real estate (including real estate investment trusts (“REITs”)) and insurance industries. From time to time, the Fund may have 25% or more of its net assets invested in any one of these industries. In addition, the Fund also may focus its investments in other sectors or industries, such as (but not limited to) energy, industrials, utilities, pipelines, health care and telecommunications. The Advisor retains broad discretion to allocate the Fund’s investments across various sectors and industries.

The Fund may invest without limit in securities of non-U.S. companies, which may be non-U.S. dollar denominated, including up to 15% of the Fund’s net assets in securities issued by companies domiciled in emerging market countries. Typically, emerging markets are in countries that are in the process of industrialization, with lower gross national products per capita than more developed countries.

The Fund may invest in debt securities of any maturity or credit rating, including investment grade securities, below investment grade securities and unrated securities. Although not required to do so, the Fund will generally seek to maintain a minimum weighted average senior debt rating of companies in which it invests of BBB-, which the Fund considers to be investment grade. Although a company’s senior debt rating may be BBB-, an underlying security issued by such company in which the Fund invests may have a lower rating than BBB-. If the Fund cannot access a company’s average senior debt rating, the Fund may look to the rating of the underlying security issued by such company. Although a company’s senior debt rating may be BBB-, an underlying security issued by such company in which the Fund invests may have a lower rating than BBB-. Below investment grade securities are also known as “high yield” or “junk” securities and are regarded as having more speculative characteristics with respect to the payment of interest and repayment of principal. The maturities of debt securities in which the Fund will invest generally will be longer-term (ten years or more); however, as a result of changing market conditions and interest rates, the Fund may also invest in shorter-term debt securities.

The Fund is authorized to purchase, sell or enter into any derivative contract or option on a derivative contract, transaction or instrument, without limitation, including various interest rate transactions such as swaps, caps, floors or collars, and foreign currency transactions such as foreign currency forward contracts, futures contracts, options, swaps and other similar strategic transactions in connection with its investments in securities of non-U.S. companies. The Fund’s primary use of derivative contracts will be to enter into interest rate and currency hedging transactions in order to reduce the interest rate and foreign currency risk inherent in the Fund’s investments.

PRINCIPAL RISKS OF INVESTING IN THE FUND

Investment Risk

An investment in the Fund is subject to investment risk, including the possible loss of the entire principal amount that you invest.

Market Risk

Your investment in Fund shares represents an indirect investment in the securities owned by the Fund. The value of these securities, like other investments, may move up or down, sometimes rapidly and unpredictably. Your Fund shares at any point in time may be worth less than what you invested, even after taking into account the reinvestment of Fund dividends and distributions.

Preferred Securities Risk

There are various risks associated with investing in preferred securities. These risks include deferral and omission of distributions; credit risk; subordination to bonds and other debt securities in a company’s capital structure; interest rate risk; prepayment and extension risk; call, reinvestment and income risk; liquidity risk; limited voting rights; and special redemption rights.

Debt Securities Risk

Debt securities generally present various risks, including many of the risks described above under “Preferred Securities Risk.” These include interest rate risk, credit risk, call risk, prepayment and extension risk, convertible securities risk, and liquidity risk.

Below Investment Grade Securities Risk

Below investment grade securities, or equivalent unrated securities, generally involve greater volatility of price and risk of loss of income and principal, and may be more susceptible to real or perceived adverse economic and competitive industry conditions than higher grade securities. It is reasonable to expect that any adverse economic condition could disrupt the market for below investment grade securities, have an adverse impact on the value of those securities and adversely affect the ability of the issuers of those securities to repay principal and interest on those securities.

Concentration Risk

Because the Fund invests at least 25% of its net assets in the financials sector, it will be more susceptible to adverse economic or regulatory occurrences affecting this sector, such as changes in interest rates, loan concentration and competition.  In addition, the Fund will also be subject to the risks of investing in the individual industries and securities that comprise the financials sector, including the bank, diversified financials, real estate (including REITs) and insurance industries.  To the extent that the Fund focuses its investments in other sectors or industries, such as (but not limited to) energy, industrials, utilities, pipelines, health care and telecommunications, the Fund will be subject to the risks associated with these particular sectors and industries.  These sectors and industries may be adversely affected by, among others, changes in government regulation, world events and economic conditions.

Liquidity Risk

Liquidity risk is the risk that particular investments of the Fund may become difficult to sell or purchase. The market for certain investments may become less liquid or illiquid due to adverse changes in the conditions of a particular issuer or due to adverse market or economic conditions. In addition, dealer inventories of certain securities, which provide an indication of the ability of dealers to engage in “market making,” are at, or near, historic lows in relation to market size, which has the potential to increase price volatility in the fixed income markets in which the Fund invests. Recent federal banking regulations may also cause certain dealers to reduce their inventories of certain securities, which may further decrease the Fund’s ability to buy or sell such securities. As a result of this decreased liquidity, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on performance. Further, transactions in less liquid or illiquid securities may entail transaction costs that are higher than those for transactions in liquid securities.

Foreign (Non-U.S.) and Emerging Market Securities Risk

Risks of investing in foreign securities, which can be expected to be greater for investments in emerging markets, include currency risks, future political and economic developments and possible imposition of foreign withholding or other taxes on income or proceeds payable on the securities. In addition, there may be less publicly available information about a foreign issuer than about a domestic issuer, and foreign issuers may not be subject to the same accounting, auditing and financial recordkeeping standards and requirements as domestic issuers.

Securities of companies in emerging markets may be more volatile than those of companies in more developed markets. Emerging market countries generally have less developed markets and economies and in some countries, less mature governments and governmental institutions. Political developments in foreign countries or the United States may at times subject such countries to sanctions from the U.S. government, foreign governments and/or international institutions that could negatively affect a Fund’s investments in issuers located in, doing business in or with assets in such countries. Investing in securities of companies in emerging markets may entail special risks relating to potential economic, political or social instability and the risks of expropriation, nationalization, confiscation, trade sanctions or embargoes or the imposition of restrictions on foreign investment, the lack of hedging instruments, and repatriation of capital invested. The securities and real estate markets of some emerging market countries have in the past experienced substantial market disruptions and may do so in the future. The economies of many emerging market countries may be heavily dependent on international trade and have thus been, and may continue to be, adversely affected by trade barriers, foreign exchange controls and other protectionist measures imposed or negotiated by the countries with which they wish to trade.

Foreign Currency Risk

Although the Fund will report its net asset value (“NAV”) and pay dividends in U.S. dollars, foreign securities often are purchased with and make any dividend and interest payments in foreign currencies. Therefore, the Fund’s investments in foreign securities will be subject to foreign currency risk, which means that the Fund’s NAV could decline solely as a result of changes in the exchange rates between foreign currencies and the U.S. dollar. Certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal, dividends and interest to investors located outside the country, due to blockage of foreign currency exchanges or otherwise. The Fund may, but is not required to, engage in various investments that are designed to hedge the Fund’s foreign currency risks, and such investments are subject to the risks described under “Derivatives and Hedging Transactions Risk” below.

Contingent Capital Securities Risk

CoCos are debt or preferred securities with loss absorption characteristics built into the terms of the security for the benefit of the issuer, for example, an automatic write-down of principal or a mandatory conversion into common stock of the issuer under certain circumstances, such as the issuer’s capital ratio falling below a certain level. CoCos may be subject to an automatic write-down (i.e., the automatic write-down of the principal amount or value of the securities, potentially to zero, and the cancellation of the securities) under certain circumstances, which could result in the Fund losing a portion or all of its investment in such securities. In addition, the Fund may not have any rights with respect to repayment of the principal amount of the securities that has not become due or the payment of interest or dividends on such securities for any period from (and including) the interest or dividend payment date falling immediately prior to the occurrence of such automatic write-down. An automatic write-down could also result in a reduced income rate if the dividend or interest payment is based on the security’s par value. If a CoCo provides for mandatory conversion of the security into common stock of the issuer under certain circumstances, such as an adverse event, the Fund could experience a reduced income rate, potentially to zero, as a result of the issuer’s common stock not paying a dividend. In addition, a conversion event would likely be the result of or related to the deterioration of the issuer’s financial condition (e.g., such as a decrease in the issuer’s capital ratio) and status as a going concern, so the market price of the issuer’s common stock received by the Fund may have declined, perhaps substantially, and may continue to decline, which may adversely affect the Fund’s NAV. Further, the issuer’s common stock would be subordinate to the issuer’s other security classes and therefore worsen the Fund’s standing in a bankruptcy proceeding. In addition, most CoCos are considered to be high yield or “junk” securities and are therefore subject to the risks of investing in below investment grade securities. See “Below Investment Grade Securities Risk” above.

Derivatives and Hedging Transactions Risk

The Fund’s use of derivatives, including for the purpose of hedging interest rate or foreign currency risks, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. Among the risks presented are counterparty risk, financial leverage risk, liquidity risk, over-the-counter (“OTC”) trading risk and tracking risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying asset, index or rate, which may be magnified by certain features of the derivatives.

The U.S. government has enacted legislation that provides for new regulation of the derivatives market. The European Union (and some other countries) are implementing similar requirements, which will affect the Fund when it enters into a derivatives transaction with a counterparty organized in that country or otherwise subject to that country’s derivatives regulations. Because these regulations are new and evolving (and some of the rules are not yet final), their impact remains unclear. These regulations have the potential to increase the costs of using derivatives, may limit the availability of some forms of derivatives or the Fund’s ability to use derivatives, and may adversely affect the performance of some derivative instruments used by the Fund as well as the Fund’s ability to pursue its investment objective through the use of such instruments.

Rule 144A Securities Risk

Rule 144A Securities are considered restricted securities because they are not registered for sale to the general public and may only be resold to certain qualified institutional buyers. Institutional markets for Rule 144A Securities that exist or may develop may provide both readily ascertainable values for such securities and the ability to promptly sell such securities. However, if there are an insufficient number of qualified institutional buyers interested in purchasing Rule 144A Securities held by the Fund, the Fund will be subject to liquidity risk and thus may not be able to sell the Rule 144A Securities at a time desired by the Fund or at prices approximating the value at which the Fund is carrying the securities on its books.

Regulation S Securities Risk

Regulation S securities are offered through private offerings without registration with the SEC pursuant to Regulation S of the Securities Act. Regulation S securities may be relatively less liquid as a result of legal or contractual restrictions on resale. Because Regulation S securities are generally less liquid than registered securities, the Fund may take longer to liquidate these positions than publicly traded securities or may not be able to sell them at the price desired. Furthermore, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded or otherwise offered in the United States. Accordingly, Regulation S securities may involve a high degree of business and financial risk and may result in losses to the Fund.

Geopolitical Risk

Occurrence of global events similar to those in recent years, such as war, terrorist attacks, natural disasters, country instability, infectious disease epidemics, market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers and other governmental trade or market control programs, the potential exit of a country from its respective union and related geopolitical events, may result in market volatility and may have long-lasting impacts on both the U.S. and global financial markets. Additionally, those events, as well as other changes in foreign and domestic political and economic conditions, could adversely affect individual issuers or related groups of issuers, securities markets, interest rates, secondary trading, credit ratings, inflation, investor sentiment and other factors affecting the value of the Fund’s investments. The decision of the United Kingdom (“UK”) to exit from the European Union following the June 2016 vote on the matter (referred to as “Brexit”) may cause uncertainty and thus adversely impact financial results of the Fund and the global financial markets. Growing tensions between the United States and other foreign powers, or among foreign powers, and possible diplomatic, trade or other sanctions could adversely impact the markets and the Fund. The strengthening or weakening of the U.S. dollar relative to other currencies may, among other things, adversely affect the Fund’s investments denominated in non-U.S. dollar currencies. It is difficult to predict when similar events affecting the U.S. or global financial markets may occur, the effects that such events may have, and the duration of those effects.

LIBOR Risk

Many financial instruments use or may use a floating rate based on the London Interbank Offered Rate, or “LIBOR,” which is the offered rate for short-term Eurodollar deposits between major international banks. On July 27, 2017, the head of the UK Financial Conduct Authority announced a desire to phase out the use of LIBOR by the end of 2021. Due to the recency of this announcement, there remains uncertainty regarding the future utilization of LIBOR and the nature of any replacement rate. As such, the potential effect of a transition away from LIBOR on the Fund or the financial instruments in which the Fund invests cannot yet be determined.

Regulatory Risk

The U.S. government has proposed and adopted multiple regulations that could have a long-lasting impact on the Fund and on the mutual fund industry in general. The Department of Labor's (“DOL”) final rule on conflicts of interest on fiduciary investment advice, as well as the Securities and Exchange Commission's (“SEC”) final rules and amendments to modernize reporting and disclosure and to develop and implement a Liquidity Risk Management Program for open-end investment companies could, among other things, restrict and/or increase the cost of the Fund’s ability to engage in transactions, impact flows into the Fund and/or increase overall expenses of the Fund. In addition, Congress, various exchanges and regulatory and self-regulatory authorities, both domestic and foreign, have undertaken reviews of options and futures trading in light of market volatility. Among the actions that have been taken or proposed to be taken are new limits and reporting requirements for speculative positions, new or more stringent daily price fluctuation limits for futures and options transactions, and increased margin requirements for various types of futures transactions. While the full extent of all of these regulations is still unclear, these regulations and actions may adversely affect the instruments in which the Fund invests and its ability to execute its investment strategy. Similarly, regulatory developments in other countries may have an unpredictable and adverse impact on the Fund.

Cyber Security Risk

With the increased use of technologies such as the Internet and the dependence on computer systems to perform necessary business functions, the Fund and its service providers (including the Advisor) may be susceptible to operational and information security risks resulting from cyber-attacks and/or other technological malfunctions. In general, cyber-attacks are deliberate, but unintentional events may have similar effects. Cyber-attacks include, among others, stealing or corrupting data maintained online or digitally, preventing legitimate users from accessing information or services on a website, releasing confidential information without authorization, gaining unauthorized access to digital systems for purposes of misappropriating assets and causing operational disruption. Cyber-attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing denial-of-service. Successful cyber-attacks against, or security breakdowns of, the Fund, the Advisor, or a custodian, transfer agent, or other affiliated or third-party service provider may adversely affect the Fund or its shareholders.

Each of the Fund and the Advisor may have limited ability to prevent or mitigate cyber-attacks or security or technology breakdowns affecting the Fund’s third-party service providers. While the Fund has established business continuity plans and systems designed to prevent or reduce the impact of cyber-attacks, such plans and systems are subject to inherent limitations.

Large Shareholder Risk

The Fund may have one or more large shareholders or a group of shareholders investing in classes of Fund shares indirectly through an account, platform or program sponsored by a financial institution. Investment and asset allocation decisions by such financial institutions regarding the account, platform or program through which multiple shareholders invest may result in subscription and redemption decisions that have a significant impact on the assets, expenses and trading activities of the Fund. Such a decision may cause the Fund to sell assets (or invest cash) at disadvantageous times or prices, increase or accelerate taxable gains or transaction costs and may negatively affect the Fund’s NAV, performance, or ability to satisfy redemptions in a timely manner.

Other Investment Companies Risk

To the extent the Fund invests a portion of its assets in investment companies, including open-end funds, closed-end funds, ETFs and other types of pooled investment funds, those assets will be subject to the risks of the purchased investment funds’ portfolio securities, and a shareholder in the Fund will bear not only his or her proportionate share of the Fund’s expenses, but also indirectly the expenses of the purchased investment funds. Shareholders would therefore be subject to duplicative expenses to the extent the Fund invests in other investment funds. Risks associated with investments in closed-end funds also generally include market risk, leverage risk, risk of market price discount from NAV, risk of anti-takeover provisions and non-diversification. In addition, restrictions under the Investment Company Act of 1940 (“1940 Act”) may limit the Fund’s ability to invest in other investment companies to the extent desired.

Active Management Risk

As an actively managed portfolio, the value of the Fund’s investments could decline because the financial condition of an issuer may change (due to such factors as management performance, reduced demand or overall market changes), financial markets may fluctuate or overall prices may decline, or the Advisor’s investment techniques could fail to achieve the Fund’s investment objective or negatively affect the Fund’s investment performance.

Your investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

FUND PERFORMANCE

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class A shares. Because Class T shares have not commenced investment operations prior to the date of this Prospectus, no performance information is provided for this share class. The table shows how the Fund’s average annual returns compare with the performance of a selected broad-based market index, the S&P 500 Index, over various time periods. In addition to the broad-based market index, the table shows performance of the ICE BofAML Fixed-Rate Preferred Securities Index and a linked blended benchmark consisting of the ICE BofAML Fixed-Rate Preferred Securities Index and the ICE BofAML U.S. Capital Securities Index through December 31, 2016 and, thereafter, the ICE BofAML US IG Institutional Capital Securities Index, the ICE BofAML Core Fixed Rate Preferred Securities Index, and the Bloomberg Barclays Developed Market USD Contingent Capital Index. The ICE BofAML Fixed-Rate Preferred Securities Index tracks the performance of fixed-rate U.S. dollar-denominated preferred securities issued in the U.S. domestic market. The ICE BofAML U.S. Capital Securities Index is a subset of the ICE BofAML U.S. Corporate Index including all fixed-to-floating rate, perpetual callable and capital securities. The ICE BofAML US IG Institutional Capital Securities Index is a subset of the ICE BofAML US Corporate Index including all fixed-to-floating rate, perpetual callable and capital securities. The ICE BofAML Core Fixed-Rate Preferred Securities Index tracks the performance of fixed-rate U.S. dollar-denominated preferred securities issued in the U.S. domestic market, excluding $1,000 par securities. The Bloomberg Barclays Developed Market USD Contingent Capital Index includes hybrid capital securities in developed markets with explicit equity conversion or write down loss absorption mechanisms that are based on an issuer’s regulatory capital ratio or other explicit solvency-based triggers.The Advisor believes that these indexes, as compared to the broad-based market index, are comprised of securities that are more representative of the Fund’s investment strategy.  Past performance (both before and after taxes) is not, however, an indication as to how the Fund may perform in the future. Updated performance information, including the Fund’s NAV per share, is available at www.cohenandsteers.com or by calling (800) 330-7348.

The bar chart does not reflect the deduction of sales charges imposed on Class A shares; if these amounts were reflected, returns would be less than those shown.

Class A Shares
Annual Total Returns

Highest quarterly return during this period:    10.47% (quarter ended September 30, 2010)
Lowest quarterly return during this period:    -5.27% (quarter ended September 30, 2011)

Average Annual Total Returns
(for the periods ended December 31, 2017)

Average Annual Total Returns - Cohen & Steers Preferred Securities & Income Fund, Inc.		1 Year		5 Years		Since Inception		Inception Date
Class A Shares		6.88%		6.17%		8.41%		May 03, 2010
Class A Shares | Return After Taxes on Distributions		5.41%		4.58%		6.76%		May 03, 2010
Class A Shares | Return After Taxes on Distributions and Sale of Fund Shares		4.75%		4.43%		6.26%		May 03, 2010
Class C Shares		9.30%		6.28%		8.24%		May 03, 2010
Class F Shares			[1]		[1]	6.79%	[1]	Apr. 03, 2017
Class I Shares		11.37%		7.33%		9.33%		May 03, 2010
Class R Shares		10.86%			[2]	6.80%	[2]	Oct. 01, 2014
Class Z Shares		11.41%			[2]	7.34%	[2]	Oct. 01, 2014
ICE BofAML Fixed Rate Preferred Securities Index (reflects no deduction for fees, expenses or taxes)	[3]	10.58%		6.25%		7.37%
Blended Benchmark (reflects no deduction for fees, expenses or taxes)	[3]	10.56%		6.16%		7.45%
S&P 500® Index (reflects no deduction for fees, expenses or taxes)	[4]	21.83%		15.79%		13.37%

After-tax returns are shown for Class A shares only. After-tax returns for Class C, F, I, R and Z shares will vary.  Class T shares are currently not available for purchase. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-advantaged arrangements such as 401(k) plans or individual retirement accounts.

[1] 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.

[1] Class T shares are currently not available for purchase.

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

[3] 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, 2019, so that the Fund’s total annual operating expenses (excluding acquired fund fees and expenses, taxes and extraordinary expenses) do not exceed 1.20% for Class A shares, 1.85% for Class C shares, 0.85% for Class F shares, 0.85% for Class I shares, 1.35% for Class R shares, 1.20% for Class T shares and 0.85% for Class Z shares. This contractual agreement can be amended at any time 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 Advisor and the Fund.

[4] The total annual fund operating expenses for Class T shares are estimated.

[1] The annual total returns for Class C, F, I, R and Z shares of the Fund are substantially similar to the annual total returns of Class A shares because the assets of all classes are invested in the same portfolio of securities. The annual total returns differ only to the extent that the classes do not have the same expenses. Class T shares are currently not available for purchase.

[1] The inception date for Class F shares is April 3, 2017.

[2] The inception date for Class R and Class Z shares is October 1, 2014.

[3] Blended benchmark consists of 50% ICE BofAML Capital Securities Index and 50% ICE BofAML Fixed Rate Preferred Securities Index through 12/31/2016. Thereafter, it consists of 60% ICE BofAML US IG Institutional Capital Securities Index, 30% ICE BofAML Core Fixed Rate Preferred Securities Index, and 10% Bloomberg Barclays Developed Market USD Contingent Capital Index.

[4] The S&P 500 Index is an unmanaged index of common stocks that is frequently used as a general measure of U.S. stock market performance.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	COHEN & STEERS PREFERRED SECURITIES & INCOME FUND, INC.
Prospectus Date	rr_ProspectusDate	May 01, 2018
Cohen & Steers Preferred Securities & Income Fund, Inc.
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	COHEN & STEERS PREFERRED SECURITIES AND INCOME FUND, INC.
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The investment objective of Cohen & Steers Preferred Securities and Income Fund, Inc. (the “Fund”) is to seek total return (high current income and capital appreciation).
Expense [Heading]	rr_ExpenseHeading	FUND FEES AND EXPENSES
Expense Narrative [Text Block]	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 (when made available) 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 this Prospectus titled “Sales Charge Reductions and Waivers Available Through Certain Intermediaries” (the “Appendix”), “Reducing the Initial Sales Charge 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 T shares are currently not available for purchase.
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, 2019
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the Fund’s most recent fiscal year, the Fund’s portfolio turnover rate was 36% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	36.00%
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 (when made available) if you invest at least $250,000 in the Fund.
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, 2019 (through June 30, 2019, 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
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund pursues its objective primarily by investing in issues of preferred and debt securities believed to be undervalued relative to credit quality and other investment characteristics. In making this determination, the Advisor evaluates the fundamental characteristics of an issuer, including an issuer’s creditworthiness, and also takes into account prevailing market factors. In analyzing credit quality, the Advisor considers not only fundamental analysis, but also an issuer’s corporate and capital structure and the placement of the preferred or debt securities within that structure. In evaluating relative value, the Advisor also takes into account call, conversion and other structural security features, in addition to such factors as the likely directions of credit ratings and relative value versus other income security classes. Under normal market conditions, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in a portfolio of preferred and debt securities issued by U.S. and non-U.S. companies, including traditional preferred securities; hybrid preferred securities that have investment and economic characteristics of both preferred stock and debt securities; floating rate preferred securities; corporate debt securities; convertible securities; contingent capital securities (“CoCos”); and securities of other open-end, closed-end or exchange-traded funds (“ETFs”) that invest primarily in preferred and/or debt securities as described herein. To the extent the Fund invests in securities of other open-end, closed-end or ETFs, the Fund will consider the investments of these funds, to the extent known by the Fund, in determining compliance with this policy. The Fund may also invest in certain restricted securities including securities that are only eligible for resale pursuant to Rule 144A under the Securities Act of 1933 (the “Securities Act”) (referred to as Rule 144A Securities) and securities of U.S. and non-U.S. issuers that are issued through private offerings without registration with the Securities and Exchange Commission (the “SEC”) pursuant to Regulation S under the Securities Act. The Fund also will invest at least 25% of its net assets in the financials sector, which is comprised of the bank, diversified financials, real estate (including real estate investment trusts (“REITs”)) and insurance industries. From time to time, the Fund may have 25% or more of its net assets invested in any one of these industries. In addition, the Fund also may focus its investments in other sectors or industries, such as (but not limited to) energy, industrials, utilities, pipelines, health care and telecommunications. The Advisor retains broad discretion to allocate the Fund’s investments across various sectors and industries. The Fund may invest without limit in securities of non-U.S. companies, which may be non-U.S. dollar denominated, including up to 15% of the Fund’s net assets in securities issued by companies domiciled in emerging market countries. Typically, emerging markets are in countries that are in the process of industrialization, with lower gross national products per capita than more developed countries. The Fund may invest in debt securities of any maturity or credit rating, including investment grade securities, below investment grade securities and unrated securities. Although not required to do so, the Fund will generally seek to maintain a minimum weighted average senior debt rating of companies in which it invests of BBB-, which the Fund considers to be investment grade. Although a company’s senior debt rating may be BBB-, an underlying security issued by such company in which the Fund invests may have a lower rating than BBB-. If the Fund cannot access a company’s average senior debt rating, the Fund may look to the rating of the underlying security issued by such company. Although a company’s senior debt rating may be BBB-, an underlying security issued by such company in which the Fund invests may have a lower rating than BBB-. Below investment grade securities are also known as “high yield” or “junk” securities and are regarded as having more speculative characteristics with respect to the payment of interest and repayment of principal. The maturities of debt securities in which the Fund will invest generally will be longer-term (ten years or more); however, as a result of changing market conditions and interest rates, the Fund may also invest in shorter-term debt securities. The Fund is authorized to purchase, sell or enter into any derivative contract or option on a derivative contract, transaction or instrument, without limitation, including various interest rate transactions such as swaps, caps, floors or collars, and foreign currency transactions such as foreign currency forward contracts, futures contracts, options, swaps and other similar strategic transactions in connection with its investments in securities of non-U.S. companies. The Fund’s primary use of derivative contracts will be to enter into interest rate and currency hedging transactions in order to reduce the interest rate and foreign currency risk inherent in the Fund’s investments.
Strategy Portfolio Concentration [Text]	rr_StrategyPortfolioConcentration	The Fund also will invest at least 25% of its net assets in the financials sector, which is comprised of the bank, diversified financials, real estate (including real estate investment trusts (“REITs”)) and insurance industries.
Risk [Heading]	rr_RiskHeading	PRINCIPAL RISKS OF INVESTING IN THE FUND
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	Investment Risk An investment in the Fund is subject to investment risk, including the possible loss of the entire principal amount that you invest. Market Risk Your investment in Fund shares represents an indirect investment in the securities owned by the Fund. The value of these securities, like other investments, may move up or down, sometimes rapidly and unpredictably. Your Fund shares at any point in time may be worth less than what you invested, even after taking into account the reinvestment of Fund dividends and distributions. Preferred Securities Risk There are various risks associated with investing in preferred securities. These risks include deferral and omission of distributions; credit risk; subordination to bonds and other debt securities in a company’s capital structure; interest rate risk; prepayment and extension risk; call, reinvestment and income risk; liquidity risk; limited voting rights; and special redemption rights. Debt Securities Risk Debt securities generally present various risks, including many of the risks described above under “Preferred Securities Risk.” These include interest rate risk, credit risk, call risk, prepayment and extension risk, convertible securities risk, and liquidity risk. Below Investment Grade Securities Risk Below investment grade securities, or equivalent unrated securities, generally involve greater volatility of price and risk of loss of income and principal, and may be more susceptible to real or perceived adverse economic and competitive industry conditions than higher grade securities. It is reasonable to expect that any adverse economic condition could disrupt the market for below investment grade securities, have an adverse impact on the value of those securities and adversely affect the ability of the issuers of those securities to repay principal and interest on those securities. Concentration Risk Because the Fund invests at least 25% of its net assets in the financials sector, it will be more susceptible to adverse economic or regulatory occurrences affecting this sector, such as changes in interest rates, loan concentration and competition.  In addition, the Fund will also be subject to the risks of investing in the individual industries and securities that comprise the financials sector, including the bank, diversified financials, real estate (including REITs) and insurance industries.  To the extent that the Fund focuses its investments in other sectors or industries, such as (but not limited to) energy, industrials, utilities, pipelines, health care and telecommunications, the Fund will be subject to the risks associated with these particular sectors and industries.  These sectors and industries may be adversely affected by, among others, changes in government regulation, world events and economic conditions. Liquidity Risk Liquidity risk is the risk that particular investments of the Fund may become difficult to sell or purchase. The market for certain investments may become less liquid or illiquid due to adverse changes in the conditions of a particular issuer or due to adverse market or economic conditions. In addition, dealer inventories of certain securities, which provide an indication of the ability of dealers to engage in “market making,” are at, or near, historic lows in relation to market size, which has the potential to increase price volatility in the fixed income markets in which the Fund invests. Recent federal banking regulations may also cause certain dealers to reduce their inventories of certain securities, which may further decrease the Fund’s ability to buy or sell such securities. As a result of this decreased liquidity, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on performance. Further, transactions in less liquid or illiquid securities may entail transaction costs that are higher than those for transactions in liquid securities. Foreign (Non-U.S.) and Emerging Market Securities Risk Risks of investing in foreign securities, which can be expected to be greater for investments in emerging markets, include currency risks, future political and economic developments and possible imposition of foreign withholding or other taxes on income or proceeds payable on the securities. In addition, there may be less publicly available information about a foreign issuer than about a domestic issuer, and foreign issuers may not be subject to the same accounting, auditing and financial recordkeeping standards and requirements as domestic issuers. Securities of companies in emerging markets may be more volatile than those of companies in more developed markets. Emerging market countries generally have less developed markets and economies and in some countries, less mature governments and governmental institutions. Political developments in foreign countries or the United States may at times subject such countries to sanctions from the U.S. government, foreign governments and/or international institutions that could negatively affect a Fund’s investments in issuers located in, doing business in or with assets in such countries. Investing in securities of companies in emerging markets may entail special risks relating to potential economic, political or social instability and the risks of expropriation, nationalization, confiscation, trade sanctions or embargoes or the imposition of restrictions on foreign investment, the lack of hedging instruments, and repatriation of capital invested. The securities and real estate markets of some emerging market countries have in the past experienced substantial market disruptions and may do so in the future. The economies of many emerging market countries may be heavily dependent on international trade and have thus been, and may continue to be, adversely affected by trade barriers, foreign exchange controls and other protectionist measures imposed or negotiated by the countries with which they wish to trade. Foreign Currency Risk Although the Fund will report its net asset value (“NAV”) and pay dividends in U.S. dollars, foreign securities often are purchased with and make any dividend and interest payments in foreign currencies. Therefore, the Fund’s investments in foreign securities will be subject to foreign currency risk, which means that the Fund’s NAV could decline solely as a result of changes in the exchange rates between foreign currencies and the U.S. dollar. Certain foreign countries may impose restrictions on the ability of issuers of foreign securities to make payment of principal, dividends and interest to investors located outside the country, due to blockage of foreign currency exchanges or otherwise. The Fund may, but is not required to, engage in various investments that are designed to hedge the Fund’s foreign currency risks, and such investments are subject to the risks described under “Derivatives and Hedging Transactions Risk” below. Contingent Capital Securities Risk CoCos are debt or preferred securities with loss absorption characteristics built into the terms of the security for the benefit of the issuer, for example, an automatic write-down of principal or a mandatory conversion into common stock of the issuer under certain circumstances, such as the issuer’s capital ratio falling below a certain level. CoCos may be subject to an automatic write-down (i.e., the automatic write-down of the principal amount or value of the securities, potentially to zero, and the cancellation of the securities) under certain circumstances, which could result in the Fund losing a portion or all of its investment in such securities. In addition, the Fund may not have any rights with respect to repayment of the principal amount of the securities that has not become due or the payment of interest or dividends on such securities for any period from (and including) the interest or dividend payment date falling immediately prior to the occurrence of such automatic write-down. An automatic write-down could also result in a reduced income rate if the dividend or interest payment is based on the security’s par value. If a CoCo provides for mandatory conversion of the security into common stock of the issuer under certain circumstances, such as an adverse event, the Fund could experience a reduced income rate, potentially to zero, as a result of the issuer’s common stock not paying a dividend. In addition, a conversion event would likely be the result of or related to the deterioration of the issuer’s financial condition (e.g., such as a decrease in the issuer’s capital ratio) and status as a going concern, so the market price of the issuer’s common stock received by the Fund may have declined, perhaps substantially, and may continue to decline, which may adversely affect the Fund’s NAV. Further, the issuer’s common stock would be subordinate to the issuer’s other security classes and therefore worsen the Fund’s standing in a bankruptcy proceeding. In addition, most CoCos are considered to be high yield or “junk” securities and are therefore subject to the risks of investing in below investment grade securities. See “Below Investment Grade Securities Risk” above. Derivatives and Hedging Transactions Risk The Fund’s use of derivatives, including for the purpose of hedging interest rate or foreign currency risks, presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. Among the risks presented are counterparty risk, financial leverage risk, liquidity risk, over-the-counter (“OTC”) trading risk and tracking risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the underlying asset, index or rate, which may be magnified by certain features of the derivatives. The U.S. government has enacted legislation that provides for new regulation of the derivatives market. The European Union (and some other countries) are implementing similar requirements, which will affect the Fund when it enters into a derivatives transaction with a counterparty organized in that country or otherwise subject to that country’s derivatives regulations. Because these regulations are new and evolving (and some of the rules are not yet final), their impact remains unclear. These regulations have the potential to increase the costs of using derivatives, may limit the availability of some forms of derivatives or the Fund’s ability to use derivatives, and may adversely affect the performance of some derivative instruments used by the Fund as well as the Fund’s ability to pursue its investment objective through the use of such instruments. Rule 144A Securities Risk Rule 144A Securities are considered restricted securities because they are not registered for sale to the general public and may only be resold to certain qualified institutional buyers. Institutional markets for Rule 144A Securities that exist or may develop may provide both readily ascertainable values for such securities and the ability to promptly sell such securities. However, if there are an insufficient number of qualified institutional buyers interested in purchasing Rule 144A Securities held by the Fund, the Fund will be subject to liquidity risk and thus may not be able to sell the Rule 144A Securities at a time desired by the Fund or at prices approximating the value at which the Fund is carrying the securities on its books. Regulation S Securities Risk Regulation S securities are offered through private offerings without registration with the SEC pursuant to Regulation S of the Securities Act. Regulation S securities may be relatively less liquid as a result of legal or contractual restrictions on resale. Because Regulation S securities are generally less liquid than registered securities, the Fund may take longer to liquidate these positions than publicly traded securities or may not be able to sell them at the price desired. Furthermore, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded or otherwise offered in the United States. Accordingly, Regulation S securities may involve a high degree of business and financial risk and may result in losses to the Fund. Geopolitical Risk Occurrence of global events similar to those in recent years, such as war, terrorist attacks, natural disasters, country instability, infectious disease epidemics, market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers and other governmental trade or market control programs, the potential exit of a country from its respective union and related geopolitical events, may result in market volatility and may have long-lasting impacts on both the U.S. and global financial markets. Additionally, those events, as well as other changes in foreign and domestic political and economic conditions, could adversely affect individual issuers or related groups of issuers, securities markets, interest rates, secondary trading, credit ratings, inflation, investor sentiment and other factors affecting the value of the Fund’s investments. The decision of the United Kingdom (“UK”) to exit from the European Union following the June 2016 vote on the matter (referred to as “Brexit”) may cause uncertainty and thus adversely impact financial results of the Fund and the global financial markets. Growing tensions between the United States and other foreign powers, or among foreign powers, and possible diplomatic, trade or other sanctions could adversely impact the markets and the Fund. The strengthening or weakening of the U.S. dollar relative to other currencies may, among other things, adversely affect the Fund’s investments denominated in non-U.S. dollar currencies. It is difficult to predict when similar events affecting the U.S. or global financial markets may occur, the effects that such events may have, and the duration of those effects. LIBOR Risk Many financial instruments use or may use a floating rate based on the London Interbank Offered Rate, or “LIBOR,” which is the offered rate for short-term Eurodollar deposits between major international banks. On July 27, 2017, the head of the UK Financial Conduct Authority announced a desire to phase out the use of LIBOR by the end of 2021. Due to the recency of this announcement, there remains uncertainty regarding the future utilization of LIBOR and the nature of any replacement rate. As such, the potential effect of a transition away from LIBOR on the Fund or the financial instruments in which the Fund invests cannot yet be determined. Regulatory Risk The U.S. government has proposed and adopted multiple regulations that could have a long-lasting impact on the Fund and on the mutual fund industry in general. The Department of Labor's (“DOL”) final rule on conflicts of interest on fiduciary investment advice, as well as the Securities and Exchange Commission's (“SEC”) final rules and amendments to modernize reporting and disclosure and to develop and implement a Liquidity Risk Management Program for open-end investment companies could, among other things, restrict and/or increase the cost of the Fund’s ability to engage in transactions, impact flows into the Fund and/or increase overall expenses of the Fund. In addition, Congress, various exchanges and regulatory and self-regulatory authorities, both domestic and foreign, have undertaken reviews of options and futures trading in light of market volatility. Among the actions that have been taken or proposed to be taken are new limits and reporting requirements for speculative positions, new or more stringent daily price fluctuation limits for futures and options transactions, and increased margin requirements for various types of futures transactions. While the full extent of all of these regulations is still unclear, these regulations and actions may adversely affect the instruments in which the Fund invests and its ability to execute its investment strategy. Similarly, regulatory developments in other countries may have an unpredictable and adverse impact on the Fund. Cyber Security Risk With the increased use of technologies such as the Internet and the dependence on computer systems to perform necessary business functions, the Fund and its service providers (including the Advisor) may be susceptible to operational and information security risks resulting from cyber-attacks and/or other technological malfunctions. In general, cyber-attacks are deliberate, but unintentional events may have similar effects. Cyber-attacks include, among others, stealing or corrupting data maintained online or digitally, preventing legitimate users from accessing information or services on a website, releasing confidential information without authorization, gaining unauthorized access to digital systems for purposes of misappropriating assets and causing operational disruption. Cyber-attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing denial-of-service. Successful cyber-attacks against, or security breakdowns of, the Fund, the Advisor, or a custodian, transfer agent, or other affiliated or third-party service provider may adversely affect the Fund or its shareholders. Each of the Fund and the Advisor may have limited ability to prevent or mitigate cyber-attacks or security or technology breakdowns affecting the Fund’s third-party service providers. While the Fund has established business continuity plans and systems designed to prevent or reduce the impact of cyber-attacks, such plans and systems are subject to inherent limitations. Large Shareholder Risk The Fund may have one or more large shareholders or a group of shareholders investing in classes of Fund shares indirectly through an account, platform or program sponsored by a financial institution. Investment and asset allocation decisions by such financial institutions regarding the account, platform or program through which multiple shareholders invest may result in subscription and redemption decisions that have a significant impact on the assets, expenses and trading activities of the Fund. Such a decision may cause the Fund to sell assets (or invest cash) at disadvantageous times or prices, increase or accelerate taxable gains or transaction costs and may negatively affect the Fund’s NAV, performance, or ability to satisfy redemptions in a timely manner. Other Investment Companies Risk To the extent the Fund invests a portion of its assets in investment companies, including open-end funds, closed-end funds, ETFs and other types of pooled investment funds, those assets will be subject to the risks of the purchased investment funds’ portfolio securities, and a shareholder in the Fund will bear not only his or her proportionate share of the Fund’s expenses, but also indirectly the expenses of the purchased investment funds. Shareholders would therefore be subject to duplicative expenses to the extent the Fund invests in other investment funds. Risks associated with investments in closed-end funds also generally include market risk, leverage risk, risk of market price discount from NAV, risk of anti-takeover provisions and non-diversification. In addition, restrictions under the Investment Company Act of 1940 (“1940 Act”) may limit the Fund’s ability to invest in other investment companies to the extent desired. Active Management Risk As an actively managed portfolio, the value of the Fund’s investments could decline because the financial condition of an issuer may change (due to such factors as management performance, reduced demand or overall market changes), financial markets may fluctuate or overall prices may decline, or the Advisor’s investment techniques could fail to achieve the Fund’s investment objective or negatively affect the Fund’s investment performance. Your investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	An investment in the Fund is subject to investment risk, including the possible loss of the entire principal amount that you invest.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	Your investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	FUND PERFORMANCE
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class A shares. Because Class T shares have not commenced investment operations prior to the date of this Prospectus, no performance information is provided for this share class. The table shows how the Fund’s average annual returns compare with the performance of a selected broad-based market index, the S&P 500 Index, over various time periods. In addition to the broad-based market index, the table shows performance of the ICE BofAML Fixed-Rate Preferred Securities Index and a linked blended benchmark consisting of the ICE BofAML Fixed-Rate Preferred Securities Index and the ICE BofAML U.S. Capital Securities Index through December 31, 2016 and, thereafter, the ICE BofAML US IG Institutional Capital Securities Index, the ICE BofAML Core Fixed Rate Preferred Securities Index, and the Bloomberg Barclays Developed Market USD Contingent Capital Index. The ICE BofAML Fixed-Rate Preferred Securities Index tracks the performance of fixed-rate U.S. dollar-denominated preferred securities issued in the U.S. domestic market. The ICE BofAML U.S. Capital Securities Index is a subset of the ICE BofAML U.S. Corporate Index including all fixed-to-floating rate, perpetual callable and capital securities. The ICE BofAML US IG Institutional Capital Securities Index is a subset of the ICE BofAML US Corporate Index including all fixed-to-floating rate, perpetual callable and capital securities. The ICE BofAML Core Fixed-Rate Preferred Securities Index tracks the performance of fixed-rate U.S. dollar-denominated preferred securities issued in the U.S. domestic market, excluding $1,000 par securities. The Bloomberg Barclays Developed Market USD Contingent Capital Index includes hybrid capital securities in developed markets with explicit equity conversion or write down loss absorption mechanisms that are based on an issuer’s regulatory capital ratio or other explicit solvency-based triggers.The Advisor believes that these indexes, as compared to the broad-based market index, are comprised of securities that are more representative of the Fund’s investment strategy.  Past performance (both before and after taxes) is not, however, an indication as to how the Fund may perform in the future. Updated performance information, including the Fund’s NAV per share, is available at www.cohenandsteers.com or by calling (800) 330-7348. The bar chart does not reflect the deduction of sales charges imposed on Class A shares; if these amounts were reflected, returns would be less than those shown.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class A shares. The table shows how the Fund’s average annual returns compare with the performance of a selected broad-based market index, the S&P 500 Index, over various time periods.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	Because Class T shares have not commenced investment operations prior to the date of this Prospectus, no performance information is provided for this share class.
Performance Additional Market Index [Text]	rr_PerformanceAdditionalMarketIndex	In addition to the broad-based market index, the table shows performance of the ICE BofAML Fixed-Rate Preferred Securities Index and a linked blended benchmark consisting of the ICE BofAML Fixed-Rate Preferred Securities Index and the ICE BofAML U.S. Capital Securities Index through December 31, 2016 and, thereafter, the ICE BofAML US IG Institutional Capital Securities Index, the ICE BofAML Core Fixed Rate Preferred Securities Index, and the Bloomberg Barclays Developed Market USD Contingent Capital Index. The ICE BofAML Fixed-Rate Preferred Securities Index tracks the performance of fixed-rate U.S. dollar-denominated preferred securities issued in the U.S. domestic market. The ICE BofAML U.S. Capital Securities Index is a subset of the ICE BofAML U.S. Corporate Index including all fixed-to-floating rate, perpetual callable and capital securities. The ICE BofAML US IG Institutional Capital Securities Index is a subset of the ICE BofAML US Corporate Index including all fixed-to-floating rate, perpetual callable and capital securities. The ICE BofAML Core Fixed-Rate Preferred Securities Index tracks the performance of fixed-rate U.S. dollar-denominated preferred securities issued in the U.S. domestic market, excluding $1,000 par securities. The Bloomberg Barclays Developed Market USD Contingent Capital Index includes hybrid capital securities in developed markets with explicit equity conversion or write down loss absorption mechanisms that are based on an issuer’s regulatory capital ratio or other explicit solvency-based triggers.The Advisor believes that these indexes, as compared to the broad-based market index, are comprised of securities that are more representative of the Fund’s investment strategy.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	(800) 330-7348
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.cohenandsteers.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Past performance (both before and after taxes) is not, however, an indication as to how the Fund may perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Class A Shares Annual Total Returns
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the deduction of sales charges imposed on Class A shares; if these amounts were reflected, returns would be less than those shown.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Highest quarterly return during this period:    10.47% (quarter ended September 30, 2010) Lowest quarterly return during this period:    -5.27% (quarter ended September 30, 2011)
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (for the periods ended December 31, 2017)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-advantaged arrangements such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for Class A shares only. After-tax returns for Class C, F, I, R and Z shares will vary.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	After-tax returns are shown for Class A shares only. After-tax returns for Class C, F, I, R and Z shares will vary.  Class T shares are currently not available for purchase. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-advantaged arrangements such as 401(k) plans or individual retirement accounts.
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	3.75%
Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none
Management Fee	rr_ManagementFeesOverAssets	0.70%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	0.10%
Total Other Expenses	rr_OtherExpensesOverAssets	0.21%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.16%	[1]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	1.16%	[1]
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 100,000
1 Year	rr_ExpenseExampleYear01	489
3 Years	rr_ExpenseExampleYear03	730
5 Years	rr_ExpenseExampleYear05	989
10 Years	rr_ExpenseExampleYear10	1,731
1 Year	rr_ExpenseExampleNoRedemptionYear01	489
3 Years	rr_ExpenseExampleNoRedemptionYear03	730
5 Years	rr_ExpenseExampleNoRedemptionYear05	989
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,731
2011	rr_AnnualReturn2011	3.32%	[2]
2012	rr_AnnualReturn2012	22.04%	[2]
2013	rr_AnnualReturn2013	2.55%	[2]
2014	rr_AnnualReturn2014	11.61%	[2]
2015	rr_AnnualReturn2015	5.78%	[2]
2016	rr_AnnualReturn2016	4.23%	[2]
2017	rr_AnnualReturn2017	11.04%	[2]
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Highest quarterly return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2010
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	10.47%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest quarterly return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(5.27%)
1 Year	rr_AverageAnnualReturnYear01	6.88%
5 Years	rr_AverageAnnualReturnYear05	6.17%
Since Inception	rr_AverageAnnualReturnSinceInception	8.41%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 03, 2010
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	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%	[3]
Management Fee	rr_ManagementFeesOverAssets	0.70%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	0.25%
Total Other Expenses	rr_OtherExpensesOverAssets	0.36%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.81%	[1]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	1.81%	[1]
1 Year	rr_ExpenseExampleYear01	$ 284
3 Years	rr_ExpenseExampleYear03	569
5 Years	rr_ExpenseExampleYear05	980
10 Years	rr_ExpenseExampleYear10	2,127
1 Year	rr_ExpenseExampleNoRedemptionYear01	184
3 Years	rr_ExpenseExampleNoRedemptionYear03	569
5 Years	rr_ExpenseExampleNoRedemptionYear05	980
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,127
1 Year	rr_AverageAnnualReturnYear01	9.30%
5 Years	rr_AverageAnnualReturnYear05	6.28%
Since Inception	rr_AverageAnnualReturnSinceInception	8.24%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 03, 2010
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class F
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	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
Management Fee	rr_ManagementFeesOverAssets	0.70%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	none
Total Other Expenses	rr_OtherExpensesOverAssets	0.11%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.81%	[1]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	0.81%	[1]
1 Year	rr_ExpenseExampleYear01	$ 83
3 Years	rr_ExpenseExampleYear03	259
5 Years	rr_ExpenseExampleYear05	450
10 Years	rr_ExpenseExampleYear10	1,002
1 Year	rr_ExpenseExampleNoRedemptionYear01	83
3 Years	rr_ExpenseExampleNoRedemptionYear03	259
5 Years	rr_ExpenseExampleNoRedemptionYear05	450
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,002
1 Year	rr_AverageAnnualReturnYear01		[4]
5 Years	rr_AverageAnnualReturnYear05		[4]
Since Inception	rr_AverageAnnualReturnSinceInception	6.79%	[4]
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 03, 2017
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class I
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	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
Management Fee	rr_ManagementFeesOverAssets	0.70%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	0.06%	[5]
Total Other Expenses	rr_OtherExpensesOverAssets	0.17%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.87%	[1]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.02%)	[1]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	0.85%	[1]
1 Year	rr_ExpenseExampleYear01	$ 87
3 Years	rr_ExpenseExampleYear03	275
5 Years	rr_ExpenseExampleYear05	480
10 Years	rr_ExpenseExampleYear10	1,070
1 Year	rr_ExpenseExampleNoRedemptionYear01	87
3 Years	rr_ExpenseExampleNoRedemptionYear03	275
5 Years	rr_ExpenseExampleNoRedemptionYear05	480
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,070
1 Year	rr_AverageAnnualReturnYear01	11.37%
5 Years	rr_AverageAnnualReturnYear05	7.33%
Since Inception	rr_AverageAnnualReturnSinceInception	9.33%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 03, 2010
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	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
Management Fee	rr_ManagementFeesOverAssets	0.70%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	none
Total Other Expenses	rr_OtherExpensesOverAssets	0.11%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.31%	[1]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	1.31%	[1]
1 Year	rr_ExpenseExampleYear01	$ 133
3 Years	rr_ExpenseExampleYear03	415
5 Years	rr_ExpenseExampleYear05	718
10 Years	rr_ExpenseExampleYear10	1,579
1 Year	rr_ExpenseExampleNoRedemptionYear01	133
3 Years	rr_ExpenseExampleNoRedemptionYear03	415
5 Years	rr_ExpenseExampleNoRedemptionYear05	718
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,579
1 Year	rr_AverageAnnualReturnYear01	10.86%
5 Years	rr_AverageAnnualReturnYear05		[6]
Since Inception	rr_AverageAnnualReturnSinceInception	6.80%	[6]
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 01, 2014
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class T
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	2.50%	[7]
Maximum Deferred Sales Charge (Load) (as % of the net asset value at the time of purchase or redemption, whichever is lower)	rr_MaximumDeferredSalesChargeOverOther	none	[7]
Management Fee	rr_ManagementFeesOverAssets	0.70%	[7]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[7]
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%	[7]
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	0.08%	[5],[7]
Total Other Expenses	rr_OtherExpensesOverAssets	0.19%	[7]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.14%	[1],[7]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none	[1],[7]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	1.14%	[1],[7],[8]
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 250,000
1 Year	rr_ExpenseExampleYear01	363
3 Years	rr_ExpenseExampleYear03	603
5 Years	rr_ExpenseExampleYear05	862
10 Years	rr_ExpenseExampleYear10	1,601
1 Year	rr_ExpenseExampleNoRedemptionYear01	363
3 Years	rr_ExpenseExampleNoRedemptionYear03	603
5 Years	rr_ExpenseExampleNoRedemptionYear05	862
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,601
Cohen & Steers Preferred Securities & Income Fund, Inc. | Class Z
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed On Purchases (as % of offering price)	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
Management Fee	rr_ManagementFeesOverAssets	0.70%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_Component1OtherExpensesOverAssets	0.11%
Shareholder Service Fee	rr_Component2OtherExpensesOverAssets	none
Total Other Expenses	rr_OtherExpensesOverAssets	0.11%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.81%	[1]
Fee Waiver/Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses (after fee waiver/expense reimbursement)	rr_NetExpensesOverAssets	0.81%	[1]
1 Year	rr_ExpenseExampleYear01	$ 83
3 Years	rr_ExpenseExampleYear03	259
5 Years	rr_ExpenseExampleYear05	450
10 Years	rr_ExpenseExampleYear10	1,002
1 Year	rr_ExpenseExampleNoRedemptionYear01	83
3 Years	rr_ExpenseExampleNoRedemptionYear03	259
5 Years	rr_ExpenseExampleNoRedemptionYear05	450
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,002
1 Year	rr_AverageAnnualReturnYear01	11.41%
5 Years	rr_AverageAnnualReturnYear05		[6]
Since Inception	rr_AverageAnnualReturnSinceInception	7.34%	[6]
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 01, 2014
Cohen & Steers Preferred Securities & Income Fund, Inc. | Return After Taxes on Distributions | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	5.41%
5 Years	rr_AverageAnnualReturnYear05	4.58%
Since Inception	rr_AverageAnnualReturnSinceInception	6.76%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 03, 2010
Cohen & Steers Preferred Securities & Income Fund, Inc. | Return After Taxes on Distributions and Sale of Fund Shares | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	4.75%
5 Years	rr_AverageAnnualReturnYear05	4.43%
Since Inception	rr_AverageAnnualReturnSinceInception	6.26%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 03, 2010
Cohen & Steers Preferred Securities & Income Fund, Inc. | ICE BofAML Fixed Rate Preferred Securities Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	10.58%	[9]
5 Years	rr_AverageAnnualReturnYear05	6.25%	[9]
Since Inception	rr_AverageAnnualReturnSinceInception	7.37%	[9]
Cohen & Steers Preferred Securities & Income Fund, Inc. | Blended Benchmark (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	10.56%	[9]
5 Years	rr_AverageAnnualReturnYear05	6.16%	[9]
Since Inception	rr_AverageAnnualReturnSinceInception	7.45%	[9]
Cohen & Steers Preferred Securities & Income Fund, Inc. | S&P 500® Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	21.83%	[10]
5 Years	rr_AverageAnnualReturnYear05	15.79%	[10]
Since Inception	rr_AverageAnnualReturnSinceInception	13.37%	[10]

[1] 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, 2019, so that the Fund’s total annual operating expenses (excluding acquired fund fees and expenses, taxes and extraordinary expenses) do not exceed 1.20% for Class A shares, 1.85% for Class C shares, 0.85% for Class F shares, 0.85% for Class I shares, 1.35% for Class R shares, 1.20% for Class T shares and 0.85% for Class Z shares. This contractual agreement can be amended at any time 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 Advisor and the Fund.

[2] The annual total returns for Class C, F, I, R and Z shares of the Fund are substantially similar to the annual total returns of Class A shares because the assets of all classes are invested in the same portfolio of securities. The annual total returns differ only to the extent that the classes do not have the same expenses. Class T shares are currently not available for purchase.

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

[4] The inception date for Class F shares is April 3, 2017.

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

[6] The inception date for Class R and Class Z shares is October 1, 2014.

[7] Class T shares are currently not available for purchase.

[8] The total annual fund operating expenses for Class T shares are estimated.

[9] Blended benchmark consists of 50% ICE BofAML Capital Securities Index and 50% ICE BofAML Fixed Rate Preferred Securities Index through 12/31/2016. Thereafter, it consists of 60% ICE BofAML US IG Institutional Capital Securities Index, 30% ICE BofAML Core Fixed Rate Preferred Securities Index, and 10% Bloomberg Barclays Developed Market USD Contingent Capital Index.

[10] The S&P 500 Index is an unmanaged index of common stocks that is frequently used as a general measure of U.S. stock market performance.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	COHEN & STEERS PREFERRED SECURITIES & INCOME FUND, INC.
Prospectus Date	rr_ProspectusDate	May 01, 2018
Document Creation Date	dei_DocumentCreationDate	Apr. 27, 2018