Shareholder Report
|
12 Months Ended |
|
Oct. 31, 2025
USD ($)
Holding
|
| Shareholder Report [Line Items] |
|
| Document Type |
N-CSR/A
|
| Amendment Flag |
true
|
| Amendment Description |
EXPLANATORY NOTEThis Form N-CSR/A is being filed solely to include a corrected version of the Annual Tailored Shareholder Report for the NYLI MacKay High Yield Corporate Bond Fund previously filed under Item 1 of Form N-CSR. The correction relates to a presentation issue in the Top 10 Holdings summary section. The correction does not impact the Fund’s net asset value, financial statements, interest income, or performance.
|
| Registrant Name |
NEW YORK LIFE INVESTMENTS FUNDS
|
| Entity Central Index Key |
0000787441
|
| Entity Investment Company Type |
N-1A
|
| Document Period End Date |
Oct. 31, 2025
|
| C000221691 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
SIMPLE Class
|
| Trading Symbol |
MHHSX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| SIMPLE Class |
$120 |
1.16% |
|
| Expenses Paid, Amount |
$ 120
|
| Expense Ratio, Percent |
1.16%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Since Inception |
| SIMPLE Class Shares |
8/31/2020 |
5.90% |
4.58% |
4.28% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
(0.32)% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.18% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
4.67% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Aug. 31, 2020
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000060792 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Investor Class
|
| Trading Symbol |
MHHIX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Investor Class |
$119 |
1.16% |
|
| Expenses Paid, Amount |
$ 119
|
| Expense Ratio, Percent |
1.16%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Ten Years |
| Investor Class Shares - Including sales charges |
2/28/2008 |
1.68% |
3.86% |
4.61% |
| Investor Class Shares - Excluding sales charges |
|
5.92% |
4.71% |
5.10% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.90% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.80% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.01% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Feb. 28, 2008
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000127160 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Class R6
|
| Trading Symbol |
MHYSX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Class R6 |
$59 |
0.57% |
|
| Expenses Paid, Amount |
$ 59
|
| Expense Ratio, Percent |
0.57%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Ten Years |
| Class R6 Shares |
6/17/2013 |
6.61% |
5.29% |
5.60% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.90% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.80% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.01% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Jun. 17, 2013
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000166835 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Class R3
|
| Trading Symbol |
MHYTX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Class R3 |
$136 |
1.32% |
|
| Expenses Paid, Amount |
$ 136
|
| Expense Ratio, Percent |
1.32%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Since Inception |
| Class R3 Shares |
2/29/2016 |
5.81% |
4.53% |
5.59% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.81% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
6.67% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.55% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Feb. 29, 2016
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000057099 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Class R2
|
| Trading Symbol |
MHYRX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Class R2 |
$110 |
1.07% |
|
| Expenses Paid, Amount |
$ 110
|
| Expense Ratio, Percent |
1.07%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Ten Years |
| Class R2 Shares |
5/1/2008 |
6.06% |
4.79% |
5.12% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.90% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.80% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.01% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
May 01, 2008
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000018696 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Class I
|
| Trading Symbol |
MHYIX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Class I |
$74 |
0.72% |
|
| Expenses Paid, Amount |
$ 74
|
| Expense Ratio, Percent |
0.72%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Ten Years |
| Class I Shares |
1/2/2004 |
6.43% |
5.15% |
5.47% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.90% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.80% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.01% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Jan. 02, 2004
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000018695 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Class C
|
| Trading Symbol |
MYHCX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Class C |
$195 |
1.91% |
|
| Expenses Paid, Amount |
$ 195
|
| Expense Ratio, Percent |
1.91%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Ten Years |
| Class C Shares - Including sales charges |
9/1/1998 |
4.00% |
3.91% |
4.29% |
| Class C Shares - Excluding sales charges |
|
4.99% |
3.91% |
4.29% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.90% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.80% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.01% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Sep. 01, 1998
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|
| C000018693 [Member] |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
NYLI MacKay High Yield Corporate Bond Fund
|
| Class Name |
Class A
|
| Trading Symbol |
MHCAX
|
| Annual or Semi-Annual Statement [Text Block] |
This annual shareholder report contains important information about NYLI MacKay High Yield Corporate Bond Fund (the "Fund") for the period November 1, 2024 to October 31, 2025.
|
| Shareholder Report Annual or Semi-Annual |
annual shareholder report
|
| Additional Information [Text Block] |
You can find additional information about the Fund at dfinview.com/NYLIM. You can also request this information by contacting us at 800-624-6782.
|
| Additional Information Phone Number |
800-624-6782
|
| Additional Information Website |
dfinview.com/NYLIM
|
| Expenses [Text Block] |
What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment)
| Share Class Name |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
| Class A |
$100 |
0.97% |
|
| Expenses Paid, Amount |
$ 100
|
| Expense Ratio, Percent |
0.97%
|
| Factors Affecting Performance [Text Block] |
What factors influenced Fund performance during the reporting period? During the 12-month reporting period ended October 31, 2025, the Fund’s performance relative to the ICE BofA U.S. High Yield Constrained Index was affected by security selection and asset allocation. The strongest positive contributions to relative returns came from positions in utilities, capital goods and basic industries. The weakest relative performance came from positions in telecommunications, retail and media. The following table outlines the key factors (securities, sectors, industries, market events and/or other characteristics) that materially affected the Fund’s performance during the reporting period.
| Key Factor |
Summary |
Impact |
| Utilities |
Security selection (a position in Lightning Power Holdings and lack of exposure to Sunnova) |
Contributed |
| Capital goods |
Security selection (lack of exposure to Ardagh Packaging) and overweight exposure |
Contributed |
| Basic industry |
Security selection and overweight exposure (a position in First Quantum Minerals) |
Contributed |
| Telecommunications |
Security selection and underweight exposure (a position in Liberty Media Puerto Rico and underweight exposure to EchoStar) |
Detracted |
| Retail |
Security selection (a position in Saks) |
Detracted |
| Media |
Security selection (a position in OT Midco Inc.) and an underweight allocation (underweight Discovery Communications) |
Detracted |
|
| Performance Past Does Not Indicate Future [Text] |
Keep in mind that the Fund ’s past performance is not a good predictor of how the Fund will perform in the future.
|
| Line Graph [Table Text Block] |
Fund Performance The following graph compares the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund (or for the life of the Fund, if shorter). It assumes a $15,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index and other indexes, if applicable, for the same period and reflects the deduction of all sales charges, where applicable.
|
| Average Annual Return [Table Text Block] |
| Average Annual Total Returns for the Year Ended October 31, 2025 |
Inception Date |
One Year |
Five Years |
Ten Years |
| Class A Shares - Including sales charges |
1/3/1995 |
1.20% |
3.89% |
4.72% |
| Class A Shares - Excluding sales charges |
|
5.96% |
4.85% |
5.20% |
| Bloomberg U.S. Aggregate Bond Index1 |
|
6.16% |
(0.24)% |
1.90% |
| ICE BofA U.S. High Yield Constrained Index2 |
|
8.03% |
5.48% |
5.80% |
| Morningstar High Yield Bond Category Average3 |
|
7.61% |
5.14% |
5.01% |
| 1. |
The Fund has selected the Bloomberg U.S. Aggregate Bond Index to represent a broad measure of market performance. The Bloomberg U.S. Aggregate Bond Index is a broad-based benchmark that measures the performance of the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid adjustable rate mortgage pass-throughs), asset-backed securities and commercial mortgage-backed securities. |
| 2. |
The ICE BofA U.S. High Yield Constrained Index, which is generally representative of the market sectors or types of investments in which the Fund invests, is a market value-weighted index of all domestic and Yankee high-yield bonds, including deferred interest bonds and payment-in-kind securities. Issuers included in the ICE BofA U.S. High Yield Constrained Index have maturities of one year or more and have a credit rating lower than BBB-/Baa3, but are not in default. No single issuer may constitute greater than 2% of the ICE BofA U.S. High Yield Constrained Index. |
| 3. |
The Morningstar High Yield Bond Category Average is representative of funds that concentrate on lower-quality bonds, which are riskier than those of higher-quality companies. These funds primarily invest in U.S. high-income debt securities where at least 65% or more of bond assets are not rated or are rated by a major agency such as Standard & Poor’s or Moody’s at the level of BB and below. Results are based on average total returns of similar funds with all dividends and capital gain distributions reinvested. |
|
| Performance Inception Date |
Jan. 03, 1995
|
| No Deduction of Taxes [Text Block] |
The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
|
| Updated Performance Information Location [Text Block] |
Visit newyorklifeinvestments.com/funds for the most recent performance information.
|
| Net Assets |
$ 11,167,394,534
|
| Holdings Count | Holding |
625
|
| Advisory Fees Paid, Amount |
$ 60,991,221
|
| Investment Company Portfolio Turnover |
34.00%
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
| Fund's net assets |
$11,167,394,534% |
| Total number of portfolio holdings |
625% |
| Total advisory fees paid |
$60,991,221% |
| Portfolio turnover rate |
34% |
|
| Holdings [Text Block] |
Graphical Representation of Holdings The tables below show the investment makeup of the Fund; percentages indicated are based on the Fund's net assets. Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments | Portfolio Composition
| Corporate Bonds |
86.7% |
| Loan Assignments |
6.9% |
| Common Stocks |
0.9% |
| Convertible Bonds |
0.4% |
| Exchange-Traded Funds |
0.4% |
| Preferred Stock |
0.3% |
| Foreign Government Bond |
0.0%‡ |
| Convertible Preferred Stock |
0.0%‡ |
| Other Assets, Less Liabilities |
4.4% |
| ‡ Less than one-tenth of a percent. |
|
| Largest Holdings [Text Block] |
Top Ten Holdings and/or Issuers*
| TransDigm, Inc., 4.625%-7.125%, due 8/15/28-1/31/34 |
2.8% |
| CCO Holdings LLC, 4.25%-5.375%, due 5/1/27-1/15/34 |
1.9% |
| Hilton Domestic Operating Co., Inc., 4.00%-5.875%, due 5/1/28-9/15/33 |
1.2% |
| Yum! Brands, Inc., 3.625%-5.375%, due 1/15/30-4/1/32 |
1.2% |
| Talen Energy Supply LLC, 6.25%-8.625%, due 5/17/30-2/1/36 |
1.2% |
| Churchill Downs, Inc., 4.75%-6.75%, due 4/1/27-5/1/31 |
1.2% |
| Jane Street Group, 6.125%-7.125%, due 4/30/31-5/1/33 |
1.1% |
| LifePoint Health, Inc., 5.375%-11.00%, due 1/15/29-6/1/32 |
1.1% |
| Cloud Software Group, Inc., 6.50%-9.00%, due 3/31/29-8/15/33 |
1.0% |
| 1011778 B.C. Unlimited Liability Co., 3.875%-6.125%, due 1/15/28-10/15/30 |
0.9% |
| * Excluding short-term investments |
|