v3.25.2
Shareholder Report
 12 Months Ended
May 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name T. ROWE PRICE NEW INCOME FUND, INC.
Entity Central Index Key 0000080249
Entity Investment Company Type N-1A
Document Period End Date May 31, 2025
C000005529  
Shareholder Report [Line Items]  
Fund Name New Income Fund
Class Name Investor Class
Trading Symbol PRCIX
Annual or Semi-Annual Statement [Text Block]

This annual shareholder report contains important information about New Income Fund (the "fund") for the period of June 1, 2024 to May 31, 2025. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary. 
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Income Fund - Investor Class
$45
0.44%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.44%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • The U.S. investment-grade fixed income market generated positive results for the 12-month reporting period. U.S. Treasury yields fell across most maturities, benefiting bond investors, and credit sectors continued to perform well amid a resilient economy, although policy uncertainty led to increased volatility in the second half of the period.

  • The fund’s underweight to Treasuries combined with out-of-benchmark and overweight allocations to high yield bonds, bank loans, and securitized credit contributed to relative performance versus the Bloomberg U.S. Aggregate Bond Index. Our positioning on the yield curve was also beneficial as the curve steepened.

  • Tactical adjustments to the fund’s duration position detracted from performance versus the benchmark. Security selection in the agency mortgage-backed securities sector also hurt performance.

  • The fund seeks to maximize total return through income and capital appreciation by investing in a broadly diversified portfolio of mostly investment-grade debt instruments. At period-end, credit risk levels in the portfolio, as measured by the duration times spread metric, were below longer-term averages. We remained cognizant of heightened policy uncertainty but took advantage of opportunities during the period to add securities to the portfolio that, in our view, offered attractive risk-adjusted yields.

  • The fund had material exposure to derivatives, including interest rate derivatives, which are primarily used to manage exposure to certain parts of the yield curve. The fund held some credit derivatives as well.
Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph.
Investor Class
Regulatory/Strategy Benchmark
2015
10,000
10,000
2015
9,908
9,945
2015
9,961
9,988
2016
10,057
10,164
2016
10,250
10,299
2016
10,496
10,539
2016
10,159
10,205
2017
10,279
10,308
2017
10,425
10,462
2017
10,572
10,591
2017
10,533
10,533
2018
10,381
10,360
2018
10,402
10,423
2018
10,462
10,480
2018
10,349
10,391
2019
10,644
10,689
2019
11,066
11,090
2019
11,499
11,546
2019
11,472
11,513
2020
11,823
11,937
2020
11,603
12,134
2020
11,962
12,293
2020
12,087
12,351
2021
11,947
12,102
2021
11,960
12,085
2021
12,178
12,283
2021
12,111
12,209
2022
11,690
11,782
2022
10,944
11,091
2022
10,690
10,868
2022
10,416
10,641
2023
10,440
10,637
2023
10,577
10,854
2023
10,433
10,738
2023
10,436
10,767
2024
10,648
10,991
2024
10,668
10,995
2024
11,174
11,522
2024
11,155
11,507
2025
11,279
11,629
2025
11,221
11,596
Average Annual Return [Table Text Block]
 
1 Year
5 Years
10 Years
New Income Fund (Investor Class)
5.18%
-0.67%
1.16%
Bloomberg U.S. Aggregate Bond Index (Regulatory/Strategy Benchmark)
5.46
-0.90
1.49
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 15,774,894,000
Holdings Count | Holding 1,613
Advisory Fees Paid, Amount $ 8,428,000
InvestmentCompanyPortfolioTurnover 99.30%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$15,774,894
  • Number of Portfolio Holdings1,613
Holdings [Text Block]
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
37.1%
Corporate Bonds
24.6
U.S. Government & Agency Mortgage-Backed Securities
20.2
Asset-Backed Securities
7.8
Bank Loans
3.8
Non-U.S. Government Mortgage-Backed Securities
3.4
Foreign Government Obligations & Municipalities
1.3
Securities Lending Collateral
0.4
Short-Term and Other
1.4
Largest Holdings [Text Block]
U.S. Treasury Notes
24.0%
U.S. Treasury Bonds
13.0
Federal National Mortgage Assn.
10.6
Federal Home Loan Mortgage
4.8
Government National Mortgage Assn.
4.5
Santander Drive Auto Receivables Trust
1.1
Bank of America
0.8
JPMorgan Chase
0.6
NRG Energy
0.6
Centene
0.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000005530  
Shareholder Report [Line Items]  
Fund Name New Income Fund
Class Name Advisor Class
Trading Symbol PANIX
Annual or Semi-Annual Statement [Text Block]

This annual shareholder report contains important information about New Income Fund (the "fund") for the period of June 1, 2024 to May 31, 2025. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary. 
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Income Fund - Advisor Class
$94
0.92%
Expenses Paid, Amount $ 94
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • The U.S. investment-grade fixed income market generated positive results for the 12-month reporting period. U.S. Treasury yields fell across most maturities, benefiting bond investors, and credit sectors continued to perform well amid a resilient economy, although policy uncertainty led to increased volatility in the second half of the period.

  • The fund’s underweight to Treasuries combined with out-of-benchmark and overweight allocations to high yield bonds, bank loans, and securitized credit contributed to relative performance versus the Bloomberg U.S. Aggregate Bond Index. Our positioning on the yield curve was also beneficial as the curve steepened.

  • Tactical adjustments to the fund’s duration position detracted from performance versus the benchmark. Security selection in the agency mortgage-backed securities sector also hurt performance.

  • The fund seeks to maximize total return through income and capital appreciation by investing in a broadly diversified portfolio of mostly investment-grade debt instruments. At period-end, credit risk levels in the portfolio, as measured by the duration times spread metric, were below longer-term averages. We remained cognizant of heightened policy uncertainty but took advantage of opportunities during the period to add securities to the portfolio that, in our view, offered attractive risk-adjusted yields.

  • The fund had material exposure to derivatives, including interest rate derivatives, which are primarily used to manage exposure to certain parts of the yield curve. The fund held some credit derivatives as well.
Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph.
Advisor Class
Regulatory/Strategy Benchmark
2015
10,000
10,000
2015
9,902
9,945
2015
9,950
9,988
2016
10,041
10,164
2016
10,228
10,299
2016
10,467
10,539
2016
10,125
10,205
2017
10,238
10,308
2017
10,388
10,462
2017
10,518
10,591
2017
10,471
10,533
2018
10,325
10,360
2018
10,327
10,423
2018
10,378
10,480
2018
10,256
10,391
2019
10,542
10,689
2019
10,951
11,090
2019
11,369
11,546
2019
11,334
11,513
2020
11,672
11,937
2020
11,446
12,134
2020
11,791
12,293
2020
11,904
12,351
2021
11,756
12,102
2021
11,760
12,085
2021
11,963
12,283
2021
11,881
12,209
2022
11,430
11,782
2022
10,665
11,091
2022
10,409
10,868
2022
10,134
10,641
2023
10,181
10,637
2023
10,299
10,854
2023
10,145
10,738
2023
10,136
10,767
2024
10,330
10,991
2024
10,336
10,995
2024
10,815
11,522
2024
10,784
11,507
2025
10,890
11,629
2025
10,820
11,596
Average Annual Return [Table Text Block]
 
1 Year
5 Years
10 Years
New Income Fund (Advisor Class)
4.68%
-1.12%
0.79%
Bloomberg U.S. Aggregate Bond Index (Regulatory/Strategy Benchmark)
5.46
-0.90
1.49
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 15,774,894,000
Holdings Count | Holding 1,613
Advisory Fees Paid, Amount $ 8,428,000
InvestmentCompanyPortfolioTurnover 99.30%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$15,774,894
  • Number of Portfolio Holdings1,613
Holdings [Text Block]
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
37.1%
Corporate Bonds
24.6
U.S. Government & Agency Mortgage-Backed Securities
20.2
Asset-Backed Securities
7.8
Bank Loans
3.8
Non-U.S. Government Mortgage-Backed Securities
3.4
Foreign Government Obligations & Municipalities
1.3
Securities Lending Collateral
0.4
Short-Term and Other
1.4
Largest Holdings [Text Block]
U.S. Treasury Notes
24.0%
U.S. Treasury Bonds
13.0
Federal National Mortgage Assn.
10.6
Federal Home Loan Mortgage
4.8
Government National Mortgage Assn.
4.5
Santander Drive Auto Receivables Trust
1.1
Bank of America
0.8
JPMorgan Chase
0.6
NRG Energy
0.6
Centene
0.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000005531  
Shareholder Report [Line Items]  
Fund Name New Income Fund
Class Name R Class
Trading Symbol RRNIX
Annual or Semi-Annual Statement [Text Block]

This annual shareholder report contains important information about New Income Fund (the "fund") for the period of June 1, 2024 to May 31, 2025. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary. 
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Income Fund - R Class
$110
1.08%
Expenses Paid, Amount $ 110
Expense Ratio, Percent 1.08%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • The U.S. investment-grade fixed income market generated positive results for the 12-month reporting period. U.S. Treasury yields fell across most maturities, benefiting bond investors, and credit sectors continued to perform well amid a resilient economy, although policy uncertainty led to increased volatility in the second half of the period.

  • The fund’s underweight to Treasuries combined with out-of-benchmark and overweight allocations to high yield bonds, bank loans, and securitized credit contributed to relative performance versus the Bloomberg U.S. Aggregate Bond Index. Our positioning on the yield curve was also beneficial as the curve steepened.

  • Tactical adjustments to the fund’s duration position detracted from performance versus the benchmark. Security selection in the agency mortgage-backed securities sector also hurt performance.

  • The fund seeks to maximize total return through income and capital appreciation by investing in a broadly diversified portfolio of mostly investment-grade debt instruments. At period-end, credit risk levels in the portfolio, as measured by the duration times spread metric, were below longer-term averages. We remained cognizant of heightened policy uncertainty but took advantage of opportunities during the period to add securities to the portfolio that, in our view, offered attractive risk-adjusted yields.

  • The fund had material exposure to derivatives, including interest rate derivatives, which are primarily used to manage exposure to certain parts of the yield curve. The fund held some credit derivatives as well.
Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph.
R Class
Regulatory/Strategy Benchmark
2015
10,000
10,000
2015
9,894
9,945
2015
9,934
9,988
2016
10,006
10,164
2016
10,184
10,299
2016
10,425
10,539
2016
10,066
10,205
2017
10,169
10,308
2017
10,308
10,462
2017
10,427
10,591
2017
10,372
10,533
2018
10,218
10,360
2018
10,211
10,423
2018
10,253
10,480
2018
10,126
10,391
2019
10,411
10,689
2019
10,794
11,090
2019
11,198
11,546
2019
11,166
11,513
2020
11,489
11,937
2020
11,247
12,134
2020
11,575
12,293
2020
11,676
12,351
2021
11,533
12,102
2021
11,514
12,085
2021
11,716
12,283
2021
11,632
12,209
2022
11,209
11,782
2022
10,467
11,091
2022
10,207
10,868
2022
9,929
10,641
2023
9,948
10,637
2023
10,063
10,854
2023
9,909
10,738
2023
9,897
10,767
2024
10,082
10,991
2024
10,084
10,995
2024
10,533
11,522
2024
10,512
11,507
2025
10,611
11,629
2025
10,540
11,596
Average Annual Return [Table Text Block]
 
1 Year
5 Years
10 Years
New Income Fund (R Class)
4.52%
-1.29%
0.53%
Bloomberg U.S. Aggregate Bond Index (Regulatory/Strategy Benchmark)
5.46
-0.90
1.49
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 15,774,894,000
Holdings Count | Holding 1,613
Advisory Fees Paid, Amount $ 8,428,000
InvestmentCompanyPortfolioTurnover 99.30%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$15,774,894
  • Number of Portfolio Holdings1,613
Holdings [Text Block]
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
37.1%
Corporate Bonds
24.6
U.S. Government & Agency Mortgage-Backed Securities
20.2
Asset-Backed Securities
7.8
Bank Loans
3.8
Non-U.S. Government Mortgage-Backed Securities
3.4
Foreign Government Obligations & Municipalities
1.3
Securities Lending Collateral
0.4
Short-Term and Other
1.4
Largest Holdings [Text Block]
U.S. Treasury Notes
24.0%
U.S. Treasury Bonds
13.0
Federal National Mortgage Assn.
10.6
Federal Home Loan Mortgage
4.8
Government National Mortgage Assn.
4.5
Santander Drive Auto Receivables Trust
1.1
Bank of America
0.8
JPMorgan Chase
0.6
NRG Energy
0.6
Centene
0.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000159679  
Shareholder Report [Line Items]  
Fund Name New Income Fund
Class Name I Class
Trading Symbol PRXEX
Annual or Semi-Annual Statement [Text Block]

This annual shareholder report contains important information about New Income Fund (the "fund") for the period of June 1, 2024 to May 31, 2025. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary. 
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Income Fund - I Class
$36
0.35%
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.35%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • The U.S. investment-grade fixed income market generated positive results for the 12-month reporting period. U.S. Treasury yields fell across most maturities, benefiting bond investors, and credit sectors continued to perform well amid a resilient economy, although policy uncertainty led to increased volatility in the second half of the period.

  • The fund’s underweight to Treasuries combined with out-of-benchmark and overweight allocations to high yield bonds, bank loans, and securitized credit contributed to relative performance versus the Bloomberg U.S. Aggregate Bond Index. Our positioning on the yield curve was also beneficial as the curve steepened.

  • Tactical adjustments to the fund’s duration position detracted from performance versus the benchmark. Security selection in the agency mortgage-backed securities sector also hurt performance.

  • The fund seeks to maximize total return through income and capital appreciation by investing in a broadly diversified portfolio of mostly investment-grade debt instruments. At period-end, credit risk levels in the portfolio, as measured by the duration times spread metric, were below longer-term averages. We remained cognizant of heightened policy uncertainty but took advantage of opportunities during the period to add securities to the portfolio that, in our view, offered attractive risk-adjusted yields.

  • The fund had material exposure to derivatives, including interest rate derivatives, which are primarily used to manage exposure to certain parts of the yield curve. The fund held some credit derivatives as well.
Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph.
I Class
Regulatory/Strategy Benchmark
8/28/15
500,000
500,000
8/31/15
499,509
499,700
11/30/15
501,856
501,835
2/29/16
506,907
510,694
5/31/16
516,832
517,490
8/31/16
529,997
529,513
11/30/16
512,654
512,733
2/28/17
518,899
517,921
5/31/17
526,996
525,659
8/31/17
534,071
532,121
11/30/17
532,290
529,213
2/28/18
525,383
520,537
5/31/18
526,033
523,690
8/31/18
529,229
526,537
11/30/18
523,647
522,110
2/28/19
539,353
537,037
5/31/19
560,330
557,208
8/31/19
582,416
580,098
11/30/19
581,820
578,452
2/29/20
599,812
599,778
5/31/20
588,239
609,672
8/31/20
606,588
617,651
11/30/20
613,045
620,586
2/28/21
606,661
608,076
5/31/21
606,845
607,204
8/31/21
618,009
617,130
11/30/21
615,320
613,428
2/28/22
594,065
591,997
5/31/22
555,740
557,280
8/31/22
542,924
546,062
11/30/22
529,089
534,666
2/28/23
531,075
534,444
5/31/23
538,185
545,338
8/31/23
530,263
539,546
11/30/23
531,209
540,974
2/29/24
541,433
552,226
5/31/24
542,567
552,458
8/31/24
568,484
578,915
11/30/24
568,343
578,166
2/28/25
574,756
584,300
5/31/25
571,900
582,616
Average Annual Return [Table Text Block]
 
1 Year
5 Years
Since Inception 8/28/15
New Income Fund (I Class)
5.41%
-0.56%
1.39%
Bloomberg U.S. Aggregate Bond Index (Regulatory/Strategy Benchmark)
5.46
-0.90
1.58
Performance Inception Date Aug. 28, 2015
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 15,774,894,000
Holdings Count | Holding 1,613
Advisory Fees Paid, Amount $ 8,428,000
InvestmentCompanyPortfolioTurnover 99.30%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$15,774,894
  • Number of Portfolio Holdings1,613
Holdings [Text Block]
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
37.1%
Corporate Bonds
24.6
U.S. Government & Agency Mortgage-Backed Securities
20.2
Asset-Backed Securities
7.8
Bank Loans
3.8
Non-U.S. Government Mortgage-Backed Securities
3.4
Foreign Government Obligations & Municipalities
1.3
Securities Lending Collateral
0.4
Short-Term and Other
1.4
Largest Holdings [Text Block]
U.S. Treasury Notes
24.0%
U.S. Treasury Bonds
13.0
Federal National Mortgage Assn.
10.6
Federal Home Loan Mortgage
4.8
Government National Mortgage Assn.
4.5
Santander Drive Auto Receivables Trust
1.1
Bank of America
0.8
JPMorgan Chase
0.6
NRG Energy
0.6
Centene
0.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000219349  
Shareholder Report [Line Items]  
Fund Name New Income Fund
Class Name Z Class
Trading Symbol TRVZX
Annual or Semi-Annual Statement [Text Block]

This annual shareholder report contains important information about New Income Fund (the "fund") for the period of June 1, 2024 to May 31, 2025. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary. 
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Income Fund - Z Class
$0
0.00%
Expenses Paid, Amount $ 0
Expense Ratio, Percent 0.00%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • The U.S. investment-grade fixed income market generated positive results for the 12-month reporting period. U.S. Treasury yields fell across most maturities, benefiting bond investors, and credit sectors continued to perform well amid a resilient economy, although policy uncertainty led to increased volatility in the second half of the period.

  • The fund’s underweight to Treasuries combined with out-of-benchmark and overweight allocations to high yield bonds, bank loans, and securitized credit contributed to relative performance versus the Bloomberg U.S. Aggregate Bond Index. Our positioning on the yield curve was also beneficial as the curve steepened.

  • Tactical adjustments to the fund’s duration position detracted from performance versus the benchmark. Security selection in the agency mortgage-backed securities sector also hurt performance.

  • The fund seeks to maximize total return through income and capital appreciation by investing in a broadly diversified portfolio of mostly investment-grade debt instruments. At period-end, credit risk levels in the portfolio, as measured by the duration times spread metric, were below longer-term averages. We remained cognizant of heightened policy uncertainty but took advantage of opportunities during the period to add securities to the portfolio that, in our view, offered attractive risk-adjusted yields.

  • The fund had material exposure to derivatives, including interest rate derivatives, which are primarily used to manage exposure to certain parts of the yield curve. The fund held some credit derivatives as well.
Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph.
Z Class
Regulatory/Strategy Benchmark
3/16/20
10,000
10,000
5/31/20
10,160
10,215
8/31/20
10,487
10,349
11/30/20
10,609
10,398
2/28/21
10,509
10,188
5/31/21
10,522
10,173
8/31/21
10,727
10,340
11/30/21
10,690
10,278
2/28/22
10,329
9,919
5/31/22
9,671
9,337
8/31/22
9,457
9,149
11/30/22
9,224
8,958
2/28/23
9,267
8,954
5/31/23
9,399
9,137
8/31/23
9,269
9,040
11/30/23
9,294
9,064
2/29/24
9,493
9,252
5/31/24
9,522
9,256
8/31/24
9,972
9,700
11/30/24
9,979
9,687
2/28/25
10,100
9,790
5/31/25
10,059
9,762
Average Annual Return [Table Text Block]
 
1 Year
5 Years
Since Inception 3/16/20
New Income Fund (Z Class)
5.64%
-0.20%
0.11%
Bloomberg U.S. Aggregate Bond Index (Regulatory/Strategy Benchmark)
5.46
-0.90
-0.46
Performance Inception Date Mar. 16, 2020
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 15,774,894,000
Holdings Count | Holding 1,613
Advisory Fees Paid, Amount $ 8,428,000
InvestmentCompanyPortfolioTurnover 99.30%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$15,774,894
  • Number of Portfolio Holdings1,613
Holdings [Text Block]
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
37.1%
Corporate Bonds
24.6
U.S. Government & Agency Mortgage-Backed Securities
20.2
Asset-Backed Securities
7.8
Bank Loans
3.8
Non-U.S. Government Mortgage-Backed Securities
3.4
Foreign Government Obligations & Municipalities
1.3
Securities Lending Collateral
0.4
Short-Term and Other
1.4
Largest Holdings [Text Block]
U.S. Treasury Notes
24.0%
U.S. Treasury Bonds
13.0
Federal National Mortgage Assn.
10.6
Federal Home Loan Mortgage
4.8
Government National Mortgage Assn.
4.5
Santander Drive Auto Receivables Trust
1.1
Bank of America
0.8
JPMorgan Chase
0.6
NRG Energy
0.6
Centene
0.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless