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Shareholder Report
 12 Months Ended 21 Months Ended 81 Months Ended 90 Months Ended 106 Months Ended
Mar. 31, 2026
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Mar. 31, 2026
USD ($)
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Mar. 31, 2026
USD ($)
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Mar. 31, 2026
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Mar. 31, 2026
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Shareholder Report [Line Items]          
Document Type N-CSR        
Amendment Flag false        
Registrant Name Fidelity Aberdeen Street Trust        
Entity Central Index Key 0000880195        
Entity Investment Company Type N-1A        
Document Period End Date Mar. 31, 2026        
Fidelity Advisor Freedom Retirement Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® Retirement Fund        
Class Name Fidelity Advisor Freedom® Retirement Fund Class K6        
Trading Symbol FEGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® Retirement Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 25 
0.24%
  
       
Expenses Paid, Amount $ 25        
Expense Ratio, Percent 0.24%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,269 $10,626 $10,773 $12,267 $12,180 $11,666 $12,377 $13,064 $14,131 Fidelity Freedom Retirement Composite Index℠ $10,000 $10,246 $10,688 $11,107 $12,218 $12,182 $11,717 $12,437 $13,126 $14,060 Bloomberg U.S. Aggregate Bond Index $10,000 $9,938 $10,384 $11,311 $11,392 $10,919 $10,396 $10,573 $11,089 $11,571   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 8.17% 2.87% 4.00% Fidelity Freedom Retirement Composite Index℠ 7.11% 2.85% 3.94% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.67% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 893,982        
Investment Company Portfolio Turnover 22.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$210,398,217
  
Number of Holdings
44
  
Total Advisory Fee
$893,982
  
Portfolio Turnover
22%
  
       
Holdings [Text Block]         Bond Funds 61.3 Domestic Equity Funds 16.3 International Equity Funds 14.6 Short-Term Funds 7.4 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 61.3                          Domestic Equity Funds - 16.3               International Equity Funds - 14.6          Short-Term Funds - 7.4                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 33.0   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 20.4   Fidelity Series Government Money Market Fund 5.5   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.0   Fidelity Series Large Cap Stock Fund 3.0   Fidelity Series Overseas Fund 2.3   Fidelity Series International Value Fund 2.3   Fidelity Series International Growth Fund 2.3   Fidelity Advisor Series Equity Growth Fund 2.2     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Name [Text Block] The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom Retirement Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® Retirement Fund        
Class Name Fidelity Advisor Freedom® Retirement Fund Class Z        
Trading Symbol FIJUX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® Retirement Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 43 
0.41%
  
       
Expenses Paid, Amount $ 43        
Expense Ratio, Percent 0.41%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,247 $10,387 $11,811 $11,723 $11,228 $11,883 $12,522 $13,523 Fidelity Freedom Retirement Composite Index℠ $10,000 $10,264 $10,666 $11,733 $11,699 $11,253 $11,944 $12,605 $13,502 Bloomberg U.S. Aggregate Bond Index $10,000 $10,460 $11,395 $11,476 $10,999 $10,473 $10,651 $11,171 $11,657   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 8.00% 2.74% 4.11% Fidelity Freedom Retirement Composite Index℠ 7.11% 2.85% 4.09% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 2.07% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 893,982        
Investment Company Portfolio Turnover 22.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$210,398,217
  
Number of Holdings
44
  
Total Advisory Fee
$893,982
  
Portfolio Turnover
22%
  
       
Holdings [Text Block]         Bond Funds 61.3 Domestic Equity Funds 16.3 International Equity Funds 14.6 Short-Term Funds 7.4 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 61.3                          Domestic Equity Funds - 16.3               International Equity Funds - 14.6          Short-Term Funds - 7.4                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 33.0   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 20.4   Fidelity Series Government Money Market Fund 5.5   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.0   Fidelity Series Large Cap Stock Fund 3.0   Fidelity Series Overseas Fund 2.3   Fidelity Series International Value Fund 2.3   Fidelity Series International Growth Fund 2.3   Fidelity Advisor Series Equity Growth Fund 2.2     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Name [Text Block] The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom Retirement Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® Retirement Fund        
Class Name Fidelity Advisor Freedom® Retirement Fund Class M        
Trading Symbol FTAFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® Retirement Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 100 
0.96%
  
       
Expenses Paid, Amount $ 100        
Expense Ratio, Percent 0.96%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $10,186 $10,616 $10,911 $11,009 $12,448 $12,284 $11,704 $12,321 $12,914 $13,876 Fidelity Freedom Retirement Composite Index℠ $10,000 $10,415 $10,867 $11,335 $11,779 $12,958 $12,920 $12,427 $13,191 $13,921 $14,911 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   3.68% 1.47% 3.33% Class M (without 3.50% sales charge) 7.44% 2.20% 3.70% Fidelity Freedom Retirement Composite Index℠ 7.11% 2.85% 4.08% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 893,982        
Investment Company Portfolio Turnover 22.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$210,398,217
  
Number of Holdings
44
  
Total Advisory Fee
$893,982
  
Portfolio Turnover
22%
  
       
Holdings [Text Block]         Bond Funds 61.3 Domestic Equity Funds 16.3 International Equity Funds 14.6 Short-Term Funds 7.4 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 61.3                          Domestic Equity Funds - 16.3               International Equity Funds - 14.6          Short-Term Funds - 7.4                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 33.0   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 20.4   Fidelity Series Government Money Market Fund 5.5   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.0   Fidelity Series Large Cap Stock Fund 3.0   Fidelity Series Overseas Fund 2.3   Fidelity Series International Value Fund 2.3   Fidelity Series International Growth Fund 2.3   Fidelity Advisor Series Equity Growth Fund 2.2     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
The fund's contractual management fee was reduced during the reporting period.

The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Name [Text Block] The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.

       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom Retirement Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® Retirement Fund        
Class Name Fidelity Advisor Freedom® Retirement Fund Class I        
Trading Symbol FIAFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® Retirement Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 48 
0.46%
  
       
Expenses Paid, Amount $ 48        
Expense Ratio, Percent 0.46%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $10,607 $11,106 $11,473 $11,622 $13,217 $13,111 $12,557 $13,279 $13,982 $15,099 Fidelity Freedom Retirement Composite Index℠ $10,000 $10,415 $10,867 $11,335 $11,779 $12,958 $12,920 $12,427 $13,191 $13,921 $14,911 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 7.99% 2.70% 4.21% Fidelity Freedom Retirement Composite Index℠ 7.11% 2.85% 4.08% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 893,982        
Investment Company Portfolio Turnover 22.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$210,398,217
  
Number of Holdings
44
  
Total Advisory Fee
$893,982
  
Portfolio Turnover
22%
  
       
Holdings [Text Block]         Bond Funds 61.3 Domestic Equity Funds 16.3 International Equity Funds 14.6 Short-Term Funds 7.4 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 61.3                          Domestic Equity Funds - 16.3               International Equity Funds - 14.6          Short-Term Funds - 7.4                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 33.0   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 20.4   Fidelity Series Government Money Market Fund 5.5   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.0   Fidelity Series Large Cap Stock Fund 3.0   Fidelity Series Overseas Fund 2.3   Fidelity Series International Value Fund 2.3   Fidelity Series International Growth Fund 2.3   Fidelity Advisor Series Equity Growth Fund 2.2     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
The fund's contractual management fee was reduced during the reporting period.

The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Name [Text Block] The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.

       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom Retirement Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® Retirement Fund        
Class Name Fidelity Advisor Freedom® Retirement Fund Class C        
Trading Symbol FCAFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® Retirement Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 151 
1.46%
  
       
Expenses Paid, Amount $ 151        
Expense Ratio, Percent 1.46%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $10,499 $10,886 $11,142 $11,175 $12,571 $12,351 $11,700 $12,259 $12,866 $13,866 Fidelity Freedom Retirement Composite Index℠ $10,000 $10,415 $10,867 $11,335 $11,779 $12,958 $12,920 $12,427 $13,191 $13,921 $14,911 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 5.85% 1.68% 3.32% Class C 6.85% 1.68% 3.32% Fidelity Freedom Retirement Composite Index℠ 7.11% 2.85% 4.08% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 893,982        
Investment Company Portfolio Turnover 22.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$210,398,217
  
Number of Holdings
44
  
Total Advisory Fee
$893,982
  
Portfolio Turnover
22%
  
       
Holdings [Text Block]         Bond Funds 61.3 Domestic Equity Funds 16.3 International Equity Funds 14.6 Short-Term Funds 7.4 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 61.3                          Domestic Equity Funds - 16.3               International Equity Funds - 14.6          Short-Term Funds - 7.4                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 33.0   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 20.4   Fidelity Series Government Money Market Fund 5.5   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.0   Fidelity Series Large Cap Stock Fund 3.0   Fidelity Series Overseas Fund 2.3   Fidelity Series International Value Fund 2.3   Fidelity Series International Growth Fund 2.3   Fidelity Advisor Series Equity Growth Fund 2.2     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
The fund's contractual management fee was reduced during the reporting period.

The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Name [Text Block] The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.

       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom Retirement Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® Retirement Fund        
Class Name Fidelity Advisor Freedom® Retirement Fund Class A        
Trading Symbol FAFAX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® Retirement Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 74 
0.71%
  
       
Expenses Paid, Amount $ 74        
Expense Ratio, Percent 0.71%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $9,966 $10,411 $10,737 $10,849 $12,305 $12,177 $11,619 $12,273 $12,881 $13,882 Fidelity Freedom Retirement Composite Index℠ $10,000 $10,415 $10,867 $11,335 $11,779 $12,958 $12,920 $12,427 $13,191 $13,921 $14,911 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   1.57% 1.24% 3.33% Class A (without 5.75% sales charge) 7.77% 2.44% 3.95% Fidelity Freedom Retirement Composite Index℠ 7.11% 2.85% 4.08% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217 $ 210,398,217
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 893,982        
Investment Company Portfolio Turnover 22.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$210,398,217
  
Number of Holdings
44
  
Total Advisory Fee
$893,982
  
Portfolio Turnover
22%
  
       
Holdings [Text Block]         Bond Funds 61.3 Domestic Equity Funds 16.3 International Equity Funds 14.6 Short-Term Funds 7.4 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 61.3                          Domestic Equity Funds - 16.3               International Equity Funds - 14.6          Short-Term Funds - 7.4                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 33.0   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 20.4   Fidelity Series Government Money Market Fund 5.5   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.0   Fidelity Series Large Cap Stock Fund 3.0   Fidelity Series Overseas Fund 2.3   Fidelity Series International Value Fund 2.3   Fidelity Series International Growth Fund 2.3   Fidelity Advisor Series Equity Growth Fund 2.2     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
The fund's contractual management fee was reduced during the reporting period.

The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Name [Text Block] The fund's name changed from Fidelity Advisor Freedom® Income Fund to Fidelity Advisor Freedom® Retirement Fund during the reporting period.
       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.

       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2065 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2065 Fund        
Class Name Fidelity Advisor Freedom® 2065 Fund Class K6        
Trading Symbol FDFRX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2065 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 50 
0.45%
  
       
Expenses Paid, Amount $ 50        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2019 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $8,642 $13,480 $13,921 $12,975 $15,773 $16,712 $20,295 Fidelity Freedom 2065 Composite Index℠ $10,000 $8,783 $13,174 $13,882 $12,862 $15,453 $16,465 $19,597 S&P 500® Index $10,000 $8,918 $13,944 $16,126 $14,879 $19,326 $20,920 $24,645   2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 21.44% 8.53% 11.06% Fidelity Freedom 2065 Composite Index℠ 19.02% 8.27% 10.48% S&P 500® Index 17.80% 12.06% 14.30% A   From June 28, 2019   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date     Jun. 28, 2019    
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 www.401k.com for more recent performance information.        
Net Assets $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 1,593,911        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$306,013,151
  
Number of Holdings
44
  
Total Advisory Fee
$1,593,911
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2065 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2065 Fund        
Class Name Fidelity Advisor Freedom® 2065 Fund Class Z        
Trading Symbol FDFQX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2065 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 71 
0.64%
  
       
Expenses Paid, Amount $ 71        
Expense Ratio, Percent 0.64%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2019 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $8,632 $13,449 $13,856 $12,901 $15,661 $16,557 $20,057 Fidelity Freedom 2065 Composite Index℠ $10,000 $8,783 $13,174 $13,882 $12,862 $15,453 $16,465 $19,597 S&P 500® Index $10,000 $8,918 $13,944 $16,126 $14,879 $19,326 $20,920 $24,645   2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 21.14% 8.32% 10.86% Fidelity Freedom 2065 Composite Index℠ 19.02% 8.27% 10.48% S&P 500® Index 17.80% 12.06% 14.30% A   From June 28, 2019   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date     Jun. 28, 2019    
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 1,593,911        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$306,013,151
  
Number of Holdings
44
  
Total Advisory Fee
$1,593,911
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2065 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2065 Fund        
Class Name Fidelity Advisor Freedom® 2065 Fund Class M        
Trading Symbol FDFVX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2065 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 131 
1.19%
  
       
Expenses Paid, Amount $ 131        
Expense Ratio, Percent 1.19%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2019 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $8,295 $12,835 $13,152 $12,178 $14,679 $15,433 $18,601 Fidelity Freedom 2065 Composite Index℠ $10,000 $8,783 $13,174 $13,882 $12,862 $15,453 $16,465 $19,597 S&P 500® Index $10,000 $8,918 $13,944 $16,126 $14,879 $19,326 $20,920 $24,645   2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class M (incl. 3.50% sales charge)   16.31% 6.94% 9.63% Class M (without 3.50% sales charge) 20.53% 7.70% 10.21% Fidelity Freedom 2065 Composite Index℠ 19.02% 8.27% 10.48% S&P 500® Index 17.80% 12.06% 14.30% A   From June 28, 2019   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date     Jun. 28, 2019    
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 1,593,911        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$306,013,151
  
Number of Holdings
44
  
Total Advisory Fee
$1,593,911
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2065 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2065 Fund        
Class Name Fidelity Advisor Freedom® 2065 Fund Class I        
Trading Symbol FDFSX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2065 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 76 
0.69%
  
       
Expenses Paid, Amount $ 76        
Expense Ratio, Percent 0.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2019 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $8,622 $13,423 $13,818 $12,852 $15,588 $16,456 $19,935 Fidelity Freedom 2065 Composite Index℠ $10,000 $8,783 $13,174 $13,882 $12,862 $15,453 $16,465 $19,597 S&P 500® Index $10,000 $8,918 $13,944 $16,126 $14,879 $19,326 $20,920 $24,645   2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class I 21.14% 8.23% 10.76% Fidelity Freedom 2065 Composite Index℠ 19.02% 8.27% 10.48% S&P 500® Index 17.80% 12.06% 14.30% A   From June 28, 2019   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date     Jun. 28, 2019    
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 1,593,911        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$306,013,151
  
Number of Holdings
44
  
Total Advisory Fee
$1,593,911
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2065 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2065 Fund        
Class Name Fidelity Advisor Freedom® 2065 Fund Class C        
Trading Symbol FDFYX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2065 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 186 
1.69%
  
       
Expenses Paid, Amount $ 186        
Expense Ratio, Percent 1.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2019 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $8,562 $13,182 $13,445 $12,386 $14,855 $15,539 $18,640 Fidelity Freedom 2065 Composite Index℠ $10,000 $8,783 $13,174 $13,882 $12,862 $15,453 $16,465 $19,597 S&P 500® Index $10,000 $8,918 $13,944 $16,126 $14,879 $19,326 $20,920 $24,645   2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class C  (incl. contingent deferred sales charge) 18.95% 7.17% 9.66% Class C 19.95% 7.17% 9.66% Fidelity Freedom 2065 Composite Index℠ 19.02% 8.27% 10.48% S&P 500® Index 17.80% 12.06% 14.30% A   From June 28, 2019   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date     Jun. 28, 2019    
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 1,593,911        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$306,013,151
  
Number of Holdings
44
  
Total Advisory Fee
$1,593,911
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2065 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2065 Fund        
Class Name Fidelity Advisor Freedom® 2065 Fund Class A        
Trading Symbol FDFZX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2065 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 104 
0.94%
  
       
Expenses Paid, Amount $ 104        
Expense Ratio, Percent 0.94%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2019 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $8,113 $12,589 $12,935 $12,006 $14,513 $15,282 $18,478 Fidelity Freedom 2065 Composite Index℠ $10,000 $8,783 $13,174 $13,882 $12,862 $15,453 $16,465 $19,597 S&P 500® Index $10,000 $8,918 $13,944 $16,126 $14,879 $19,326 $20,920 $24,645   2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class A (incl. 5.75% sales charge)   13.96% 6.71% 9.52% Class A (without 5.75% sales charge) 20.91% 7.98% 10.49% Fidelity Freedom 2065 Composite Index℠ 19.02% 8.27% 10.48% S&P 500® Index 17.80% 12.06% 14.30% A   From June 28, 2019   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date     Jun. 28, 2019    
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151 $ 306,013,151
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 1,593,911        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$306,013,151
  
Number of Holdings
44
  
Total Advisory Fee
$1,593,911
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2060 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2060 Fund        
Class Name Fidelity Advisor Freedom® 2060 Fund Class K6        
Trading Symbol FNGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2060 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 50 
0.45%
  
       
Expenses Paid, Amount $ 50        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,914 $11,310 $10,152 $15,849 $16,361 $15,255 $18,545 $19,649 $23,860 Fidelity Freedom 2060 Composite Index℠ $10,000 $10,921 $11,461 $10,454 $15,681 $16,524 $15,310 $18,394 $19,598 $23,326 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 21.43% 8.53% 10.36% Fidelity Freedom 2060 Composite Index℠ 19.02% 8.27% 10.08% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 4,753,966        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$845,286,045
  
Number of Holdings
44
  
Total Advisory Fee
$4,753,966
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2060 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2060 Fund        
Class Name Fidelity Advisor Freedom® 2060 Fund Class Z        
Trading Symbol FIJTX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2060 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 71 
0.64%
  
       
Expenses Paid, Amount $ 71        
Expense Ratio, Percent 0.64%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,866 $8,848 $13,793 $14,215 $13,232 $16,059 $16,986 $20,587 Fidelity Freedom 2060 Composite Index℠ $10,000 $9,883 $9,014 $13,522 $14,248 $13,202 $15,861 $16,899 $20,114 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 21.20% 8.34% 10.11% Fidelity Freedom 2060 Composite Index℠ 19.02% 8.27% 9.77% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 4,753,966        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$845,286,045
  
Number of Holdings
44
  
Total Advisory Fee
$4,753,966
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2060 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2060 Fund        
Class Name Fidelity Advisor Freedom® 2060 Fund Class M        
Trading Symbol FDKTX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2060 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 131 
1.19%
  
       
Expenses Paid, Amount $ 131        
Expense Ratio, Percent 1.19%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $11,125 $12,577 $12,932 $11,527 $17,866 $18,312 $16,939 $20,441 $21,466 $25,880 Fidelity Freedom 2060 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,838 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   16.34% 6.93% 9.98% Class M (without 3.50% sales charge) 20.56% 7.69% 10.37% Fidelity Freedom 2060 Composite Index℠ 19.02% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 4,753,966        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$845,286,045
  
Number of Holdings
44
  
Total Advisory Fee
$4,753,966
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2060 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2060 Fund        
Class Name Fidelity Advisor Freedom® 2060 Fund Class I        
Trading Symbol FDKQX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2060 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 76 
0.69%
  
       
Expenses Paid, Amount $ 76        
Expense Ratio, Percent 0.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,582 $13,161 $13,606 $12,194 $18,976 $19,548 $18,170 $22,029 $23,269 $28,192 Fidelity Freedom 2060 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,838 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 21.15% 8.24% 10.92% Fidelity Freedom 2060 Composite Index℠ 19.02% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 4,753,966        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$845,286,045
  
Number of Holdings
44
  
Total Advisory Fee
$4,753,966
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2060 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2060 Fund        
Class Name Fidelity Advisor Freedom® 2060 Fund Class C        
Trading Symbol FDKSX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2060 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 186 
1.69%
  
       
Expenses Paid, Amount $ 186        
Expense Ratio, Percent 1.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,465 $12,902 $13,202 $11,714 $18,056 $18,406 $16,940 $20,346 $21,432 $25,910 Fidelity Freedom 2060 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,838 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 18.92% 7.16% 9.99% Class C 19.92% 7.16% 9.99% Fidelity Freedom 2060 Composite Index℠ 19.02% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 4,753,966        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$845,286,045
  
Number of Holdings
44
  
Total Advisory Fee
$4,753,966
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2060 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2060 Fund        
Class Name Fidelity Advisor Freedom® 2060 Fund Class A        
Trading Symbol FDKPX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2060 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 104 
0.94%
  
       
Expenses Paid, Amount $ 104        
Expense Ratio, Percent 0.94%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,890 $12,354 $12,737 $11,381 $17,672 $18,156 $16,842 $20,367 $21,454 $25,936 Fidelity Freedom 2060 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,838 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   13.94% 6.70% 10.00% Class A (without 5.75% sales charge) 20.89% 7.98% 10.65% Fidelity Freedom 2060 Composite Index℠ 19.02% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045 $ 845,286,045
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 4,753,966        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$845,286,045
  
Number of Holdings
44
  
Total Advisory Fee
$4,753,966
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 56.0 International Equity Funds 41.4 Bond Funds 2.3 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 56.0               International Equity Funds - 41.4          Bond Funds - 2.3                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Advisor Series Equity Growth Fund 8.4   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 6.0     79.7          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual proxy and shareholder meeting expense cap expired during the reporting period.
The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2055 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2055 Fund        
Class Name Fidelity Advisor Freedom® 2055 Fund Class K6        
Trading Symbol FBGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2055 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 50 
0.45%
  
       
Expenses Paid, Amount $ 50        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,916 $11,308 $10,152 $15,852 $16,375 $15,260 $18,555 $19,647 $23,862 Fidelity Freedom 2055 Composite Index℠ $10,000 $10,921 $11,461 $10,454 $15,681 $16,524 $15,310 $18,394 $19,598 $23,328 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 21.45% 8.52% 10.36% Fidelity Freedom 2055 Composite Index℠ 19.03% 8.27% 10.08% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043
Holdings Count | shares 43 43 43 43 43
Advisory Fees Paid, Amount $ 8,317,159        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,441,152,043
  
Number of Holdings
43
  
Total Advisory Fee
$8,317,159
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.9 International Equity Funds 41.3 Bond Funds 2.5 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.9               International Equity Funds - 41.3          Bond Funds - 2.5                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.5   Fidelity Advisor Series Equity Growth Fund 8.5   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 5.9     79.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2055 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2055 Fund        
Class Name Fidelity Advisor Freedom® 2055 Fund Class Z        
Trading Symbol FIJSX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2055 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 71 
0.64%
  
       
Expenses Paid, Amount $ 71        
Expense Ratio, Percent 0.64%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,865 $8,851 $13,791 $14,219 $13,241 $16,069 $16,990 $20,582 Fidelity Freedom 2055 Composite Index℠ $10,000 $9,883 $9,014 $13,522 $14,248 $13,202 $15,861 $16,899 $20,115 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 21.14% 8.34% 10.10% Fidelity Freedom 2055 Composite Index℠ 19.03% 8.27% 9.77% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043
Holdings Count | shares 43 43 43 43 43
Advisory Fees Paid, Amount $ 8,317,159        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,441,152,043
  
Number of Holdings
43
  
Total Advisory Fee
$8,317,159
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.9 International Equity Funds 41.3 Bond Funds 2.5 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.9               International Equity Funds - 41.3          Bond Funds - 2.5                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.5   Fidelity Advisor Series Equity Growth Fund 8.5   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 5.9     79.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2055 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2055 Fund        
Class Name Fidelity Advisor Freedom® 2055 Fund Class M        
Trading Symbol FHFTX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2055 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 131 
1.19%
  
       
Expenses Paid, Amount $ 131        
Expense Ratio, Percent 1.19%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $11,123 $12,585 $12,946 $11,543 $17,878 $18,329 $16,950 $20,448 $21,482 $25,904 Fidelity Freedom 2055 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,840 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   16.37% 6.93% 9.99% Class M (without 3.50% sales charge) 20.59% 7.70% 10.38% Fidelity Freedom 2055 Composite Index℠ 19.03% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043
Holdings Count | shares 43 43 43 43 43
Advisory Fees Paid, Amount $ 8,317,159        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,441,152,043
  
Number of Holdings
43
  
Total Advisory Fee
$8,317,159
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.9 International Equity Funds 41.3 Bond Funds 2.5 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.9               International Equity Funds - 41.3          Bond Funds - 2.5                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.5   Fidelity Advisor Series Equity Growth Fund 8.5   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 5.9     79.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2055 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2055 Fund        
Class Name Fidelity Advisor Freedom® 2055 Fund Class I        
Trading Symbol FHFIX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2055 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 76 
0.69%
  
       
Expenses Paid, Amount $ 76        
Expense Ratio, Percent 0.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,581 $13,171 $13,611 $12,189 $18,981 $19,551 $18,184 $22,043 $23,285 $28,206 Fidelity Freedom 2055 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,840 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 21.13% 8.24% 10.93% Fidelity Freedom 2055 Composite Index℠ 19.03% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043
Holdings Count | shares 43 43 43 43 43
Advisory Fees Paid, Amount $ 8,317,159        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,441,152,043
  
Number of Holdings
43
  
Total Advisory Fee
$8,317,159
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.9 International Equity Funds 41.3 Bond Funds 2.5 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.9               International Equity Funds - 41.3          Bond Funds - 2.5                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.5   Fidelity Advisor Series Equity Growth Fund 8.5   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 5.9     79.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2055 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2055 Fund        
Class Name Fidelity Advisor Freedom® 2055 Fund Class C        
Trading Symbol FHFCX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2055 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 186 
1.69%
  
       
Expenses Paid, Amount $ 186        
Expense Ratio, Percent 1.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,462 $12,908 $13,208 $11,717 $18,052 $18,417 $16,943 $20,347 $21,431 $25,895 Fidelity Freedom 2055 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,840 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 18.87% 7.16% 9.98% Class C 19.87% 7.16% 9.98% Fidelity Freedom 2055 Composite Index℠ 19.03% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043
Holdings Count | shares 43 43 43 43 43
Advisory Fees Paid, Amount $ 8,317,159        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,441,152,043
  
Number of Holdings
43
  
Total Advisory Fee
$8,317,159
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.9 International Equity Funds 41.3 Bond Funds 2.5 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.9               International Equity Funds - 41.3          Bond Funds - 2.5                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.5   Fidelity Advisor Series Equity Growth Fund 8.5   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 5.9     79.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2055 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2055 Fund        
Class Name Fidelity Advisor Freedom® 2055 Fund Class A        
Trading Symbol FHFAX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2055 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 104 
0.94%
  
       
Expenses Paid, Amount $ 104        
Expense Ratio, Percent 0.94%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,885 $12,344 $12,725 $11,380 $17,674 $18,160 $16,832 $20,372 $21,457 $25,926 Fidelity Freedom 2055 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,840 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   13.88% 6.69% 10.00% Class A (without 5.75% sales charge) 20.83% 7.96% 10.65% Fidelity Freedom 2055 Composite Index℠ 19.03% 8.27% 10.78% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043 $ 1,441,152,043
Holdings Count | shares 43 43 43 43 43
Advisory Fees Paid, Amount $ 8,317,159        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,441,152,043
  
Number of Holdings
43
  
Total Advisory Fee
$8,317,159
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.9 International Equity Funds 41.3 Bond Funds 2.5 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.9               International Equity Funds - 41.3          Bond Funds - 2.5                           Short-Term Investments and Net Other Assets (Liabilities) - 0.3          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.4   Fidelity Series Emerging Markets Opportunities Fund 10.5   Fidelity Advisor Series Equity Growth Fund 8.5   Fidelity Series International Value Fund 7.7   Fidelity Series Overseas Fund 7.7   Fidelity Series International Growth Fund 7.7   Fidelity Series Opportunistic Insights Fund 7.2   Fidelity Series Stock Selector Large Cap Value Fund 6.5   Fidelity Series Value Discovery Fund 6.5   Fidelity Advisor Series Growth Opportunities Fund 5.9     79.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2050 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2050 Fund        
Class Name Fidelity Advisor Freedom® 2050 Fund Class K6        
Trading Symbol FVGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2050 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 50 
0.45%
  
       
Expenses Paid, Amount $ 50        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,915 $11,302 $10,156 $15,844 $16,367 $15,248 $18,549 $19,653 $23,862 Fidelity Freedom 2050 Composite Index℠ $10,000 $10,921 $11,461 $10,454 $15,681 $16,524 $15,310 $18,394 $19,598 $23,336 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 21.42% 8.53% 10.36% Fidelity Freedom 2050 Composite Index℠ 19.07% 8.27% 10.08% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 11,969,686        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,014,225,943
  
Number of Holdings
44
  
Total Advisory Fee
$11,969,686
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.0 International Equity Funds 40.7 Bond Funds 3.9 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.0               International Equity Funds - 40.7          Bond Funds - 3.9                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.3   Fidelity Series Emerging Markets Opportunities Fund 10.4   Fidelity Advisor Series Equity Growth Fund 8.3   Fidelity Series International Value Fund 7.6   Fidelity Series Overseas Fund 7.5   Fidelity Series International Growth Fund 7.5   Fidelity Series Opportunistic Insights Fund 7.1   Fidelity Series Stock Selector Large Cap Value Fund 6.4   Fidelity Series Value Discovery Fund 6.4   Fidelity Advisor Series Growth Opportunities Fund 5.8     78.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2050 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2050 Fund        
Class Name Fidelity Advisor Freedom® 2050 Fund Class Z        
Trading Symbol FIJRX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2050 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 71 
0.64%
  
       
Expenses Paid, Amount $ 71        
Expense Ratio, Percent 0.64%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,866 $8,846 $13,797 $14,224 $13,239 $16,064 $16,978 $20,588 Fidelity Freedom 2050 Composite Index℠ $10,000 $9,883 $9,014 $13,522 $14,248 $13,202 $15,861 $16,899 $20,122 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 21.26% 8.34% 10.11% Fidelity Freedom 2050 Composite Index℠ 19.07% 8.27% 9.77% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 11,969,686        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,014,225,943
  
Number of Holdings
44
  
Total Advisory Fee
$11,969,686
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.0 International Equity Funds 40.7 Bond Funds 3.9 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.0               International Equity Funds - 40.7          Bond Funds - 3.9                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.3   Fidelity Series Emerging Markets Opportunities Fund 10.4   Fidelity Advisor Series Equity Growth Fund 8.3   Fidelity Series International Value Fund 7.6   Fidelity Series Overseas Fund 7.5   Fidelity Series International Growth Fund 7.5   Fidelity Series Opportunistic Insights Fund 7.1   Fidelity Series Stock Selector Large Cap Value Fund 6.4   Fidelity Series Value Discovery Fund 6.4   Fidelity Advisor Series Growth Opportunities Fund 5.8     78.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2050 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2050 Fund        
Class Name Fidelity Advisor Freedom® 2050 Fund Class M        
Trading Symbol FFFQX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2050 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 131 
1.19%
  
       
Expenses Paid, Amount $ 131        
Expense Ratio, Percent 1.19%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $11,119 $12,582 $12,939 $11,530 $17,861 $18,311 $16,937 $20,438 $21,469 $25,894 Fidelity Freedom 2050 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,849 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   16.39% 6.95% 9.98% Class M (without 3.50% sales charge) 20.61% 7.71% 10.37% Fidelity Freedom 2050 Composite Index℠ 19.07% 8.27% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 11,969,686        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,014,225,943
  
Number of Holdings
44
  
Total Advisory Fee
$11,969,686
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.0 International Equity Funds 40.7 Bond Funds 3.9 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.0               International Equity Funds - 40.7          Bond Funds - 3.9                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.3   Fidelity Series Emerging Markets Opportunities Fund 10.4   Fidelity Advisor Series Equity Growth Fund 8.3   Fidelity Series International Value Fund 7.6   Fidelity Series Overseas Fund 7.5   Fidelity Series International Growth Fund 7.5   Fidelity Series Opportunistic Insights Fund 7.1   Fidelity Series Stock Selector Large Cap Value Fund 6.4   Fidelity Series Value Discovery Fund 6.4   Fidelity Advisor Series Growth Opportunities Fund 5.8     78.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2050 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2050 Fund        
Class Name Fidelity Advisor Freedom® 2050 Fund Class I        
Trading Symbol FFFPX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2050 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 76 
0.69%
  
       
Expenses Paid, Amount $ 76        
Expense Ratio, Percent 0.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,581 $13,172 $13,606 $12,196 $18,983 $19,554 $18,172 $22,036 $23,284 $28,215 Fidelity Freedom 2050 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,849 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 21.18% 8.25% 10.93% Fidelity Freedom 2050 Composite Index℠ 19.07% 8.27% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 11,969,686        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,014,225,943
  
Number of Holdings
44
  
Total Advisory Fee
$11,969,686
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.0 International Equity Funds 40.7 Bond Funds 3.9 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.0               International Equity Funds - 40.7          Bond Funds - 3.9                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.3   Fidelity Series Emerging Markets Opportunities Fund 10.4   Fidelity Advisor Series Equity Growth Fund 8.3   Fidelity Series International Value Fund 7.6   Fidelity Series Overseas Fund 7.5   Fidelity Series International Growth Fund 7.5   Fidelity Series Opportunistic Insights Fund 7.1   Fidelity Series Stock Selector Large Cap Value Fund 6.4   Fidelity Series Value Discovery Fund 6.4   Fidelity Advisor Series Growth Opportunities Fund 5.8     78.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2050 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2050 Fund        
Class Name Fidelity Advisor Freedom® 2050 Fund Class C        
Trading Symbol FFFYX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2050 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 186 
1.69%
  
       
Expenses Paid, Amount $ 186        
Expense Ratio, Percent 1.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,473 $12,918 $13,220 $11,723 $18,064 $18,426 $16,961 $20,364 $21,448 $25,933 Fidelity Freedom 2050 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,849 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 18.95% 7.17% 10.00% Class C 19.95% 7.17% 10.00% Fidelity Freedom 2050 Composite Index℠ 19.07% 8.27% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 11,969,686        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,014,225,943
  
Number of Holdings
44
  
Total Advisory Fee
$11,969,686
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.0 International Equity Funds 40.7 Bond Funds 3.9 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.0               International Equity Funds - 40.7          Bond Funds - 3.9                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.3   Fidelity Series Emerging Markets Opportunities Fund 10.4   Fidelity Advisor Series Equity Growth Fund 8.3   Fidelity Series International Value Fund 7.6   Fidelity Series Overseas Fund 7.5   Fidelity Series International Growth Fund 7.5   Fidelity Series Opportunistic Insights Fund 7.1   Fidelity Series Stock Selector Large Cap Value Fund 6.4   Fidelity Series Value Discovery Fund 6.4   Fidelity Advisor Series Growth Opportunities Fund 5.8     78.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2050 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2050 Fund        
Class Name Fidelity Advisor Freedom® 2050 Fund Class A        
Trading Symbol FFFLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2050 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 104 
0.94%
  
       
Expenses Paid, Amount $ 104        
Expense Ratio, Percent 0.94%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,888 $12,349 $12,730 $11,384 $17,675 $18,163 $16,843 $20,370 $21,455 $25,941 Fidelity Freedom 2050 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,849 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   13.96% 6.70% 10.00% Class A (without 5.75% sales charge) 20.91% 7.98% 10.65% Fidelity Freedom 2050 Composite Index℠ 19.07% 8.27% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943 $ 2,014,225,943
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 11,969,686        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,014,225,943
  
Number of Holdings
44
  
Total Advisory Fee
$11,969,686
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Domestic Equity Funds 55.0 International Equity Funds 40.7 Bond Funds 3.9 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 55.0               International Equity Funds - 40.7          Bond Funds - 3.9                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.3   Fidelity Series Emerging Markets Opportunities Fund 10.4   Fidelity Advisor Series Equity Growth Fund 8.3   Fidelity Series International Value Fund 7.6   Fidelity Series Overseas Fund 7.5   Fidelity Series International Growth Fund 7.5   Fidelity Series Opportunistic Insights Fund 7.1   Fidelity Series Stock Selector Large Cap Value Fund 6.4   Fidelity Series Value Discovery Fund 6.4   Fidelity Advisor Series Growth Opportunities Fund 5.8     78.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2045 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2045 Fund        
Class Name Fidelity Advisor Freedom® 2045 Fund Class K6        
Trading Symbol FCGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2045 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 50 
0.45%
  
       
Expenses Paid, Amount $ 50        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,915 $11,306 $10,150 $15,847 $16,373 $15,249 $18,555 $19,650 $23,887 Fidelity Freedom 2045 Composite Index℠ $10,000 $10,921 $11,461 $10,454 $15,681 $16,524 $15,310 $18,394 $19,598 $23,345 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 21.56% 8.55% 10.37% Fidelity Freedom 2045 Composite Index℠ 19.12% 8.28% 10.09% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 13,330,281        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,256,608,802
  
Number of Holdings
44
  
Total Advisory Fee
$13,330,281
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 54.2 International Equity Funds 40.2 Bond Funds 5.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 54.2               International Equity Funds - 40.2          Bond Funds - 5.2                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.1   Fidelity Series Emerging Markets Opportunities Fund 10.3   Fidelity Advisor Series Equity Growth Fund 8.1   Fidelity Series International Value Fund 7.4   Fidelity Series Overseas Fund 7.4   Fidelity Series International Growth Fund 7.4   Fidelity Series Opportunistic Insights Fund 7.0   Fidelity Series Stock Selector Large Cap Value Fund 6.3   Fidelity Series Value Discovery Fund 6.3   Fidelity Advisor Series Growth Opportunities Fund 5.8     77.1          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2045 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2045 Fund        
Class Name Fidelity Advisor Freedom® 2045 Fund Class Z        
Trading Symbol FIJQX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2045 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 71 
0.64%
  
       
Expenses Paid, Amount $ 71        
Expense Ratio, Percent 0.64%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,867 $8,848 $13,790 $14,220 $13,230 $16,072 $16,982 $20,598 Fidelity Freedom 2045 Composite Index℠ $10,000 $9,883 $9,014 $13,522 $14,248 $13,202 $15,861 $16,899 $20,130 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 21.29% 8.36% 10.12% Fidelity Freedom 2045 Composite Index℠ 19.12% 8.28% 9.78% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 13,330,281        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,256,608,802
  
Number of Holdings
44
  
Total Advisory Fee
$13,330,281
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 54.2 International Equity Funds 40.2 Bond Funds 5.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 54.2               International Equity Funds - 40.2          Bond Funds - 5.2                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.1   Fidelity Series Emerging Markets Opportunities Fund 10.3   Fidelity Advisor Series Equity Growth Fund 8.1   Fidelity Series International Value Fund 7.4   Fidelity Series Overseas Fund 7.4   Fidelity Series International Growth Fund 7.4   Fidelity Series Opportunistic Insights Fund 7.0   Fidelity Series Stock Selector Large Cap Value Fund 6.3   Fidelity Series Value Discovery Fund 6.3   Fidelity Advisor Series Growth Opportunities Fund 5.8     77.1          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2045 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2045 Fund        
Class Name Fidelity Advisor Freedom® 2045 Fund Class M        
Trading Symbol FFFTX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2045 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 131 
1.19%
  
       
Expenses Paid, Amount $ 131        
Expense Ratio, Percent 1.19%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $11,126 $12,586 $12,938 $11,540 $17,869 $18,322 $16,937 $20,439 $21,482 $25,920 Fidelity Freedom 2045 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,861 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   16.44% 6.96% 9.99% Class M (without 3.50% sales charge) 20.66% 7.72% 10.39% Fidelity Freedom 2045 Composite Index℠ 19.12% 8.28% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 13,330,281        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,256,608,802
  
Number of Holdings
44
  
Total Advisory Fee
$13,330,281
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 54.2 International Equity Funds 40.2 Bond Funds 5.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 54.2               International Equity Funds - 40.2          Bond Funds - 5.2                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.1   Fidelity Series Emerging Markets Opportunities Fund 10.3   Fidelity Advisor Series Equity Growth Fund 8.1   Fidelity Series International Value Fund 7.4   Fidelity Series Overseas Fund 7.4   Fidelity Series International Growth Fund 7.4   Fidelity Series Opportunistic Insights Fund 7.0   Fidelity Series Stock Selector Large Cap Value Fund 6.3   Fidelity Series Value Discovery Fund 6.3   Fidelity Advisor Series Growth Opportunities Fund 5.8     77.1          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2045 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2045 Fund        
Class Name Fidelity Advisor Freedom® 2045 Fund Class I        
Trading Symbol FFFIX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2045 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 76 
0.69%
  
       
Expenses Paid, Amount $ 76        
Expense Ratio, Percent 0.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,583 $13,178 $13,619 $12,194 $18,995 $19,568 $18,181 $22,057 $23,294 $28,234 Fidelity Freedom 2045 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,861 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 21.21% 8.25% 10.94% Fidelity Freedom 2045 Composite Index℠ 19.12% 8.28% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 13,330,281        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,256,608,802
  
Number of Holdings
44
  
Total Advisory Fee
$13,330,281
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 54.2 International Equity Funds 40.2 Bond Funds 5.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 54.2               International Equity Funds - 40.2          Bond Funds - 5.2                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.1   Fidelity Series Emerging Markets Opportunities Fund 10.3   Fidelity Advisor Series Equity Growth Fund 8.1   Fidelity Series International Value Fund 7.4   Fidelity Series Overseas Fund 7.4   Fidelity Series International Growth Fund 7.4   Fidelity Series Opportunistic Insights Fund 7.0   Fidelity Series Stock Selector Large Cap Value Fund 6.3   Fidelity Series Value Discovery Fund 6.3   Fidelity Advisor Series Growth Opportunities Fund 5.8     77.1          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2045 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2045 Fund        
Class Name Fidelity Advisor Freedom® 2045 Fund Class C        
Trading Symbol FFFJX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2045 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 186 
1.69%
  
       
Expenses Paid, Amount $ 186        
Expense Ratio, Percent 1.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,471 $12,915 $13,211 $11,715 $18,069 $18,423 $16,950 $20,347 $21,439 $25,929 Fidelity Freedom 2045 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,861 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 19.06% 7.17% 10.00% Class C 20.06% 7.17% 10.00% Fidelity Freedom 2045 Composite Index℠ 19.12% 8.28% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 13,330,281        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,256,608,802
  
Number of Holdings
44
  
Total Advisory Fee
$13,330,281
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 54.2 International Equity Funds 40.2 Bond Funds 5.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 54.2               International Equity Funds - 40.2          Bond Funds - 5.2                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.1   Fidelity Series Emerging Markets Opportunities Fund 10.3   Fidelity Advisor Series Equity Growth Fund 8.1   Fidelity Series International Value Fund 7.4   Fidelity Series Overseas Fund 7.4   Fidelity Series International Growth Fund 7.4   Fidelity Series Opportunistic Insights Fund 7.0   Fidelity Series Stock Selector Large Cap Value Fund 6.3   Fidelity Series Value Discovery Fund 6.3   Fidelity Advisor Series Growth Opportunities Fund 5.8     77.1          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2045 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2045 Fund        
Class Name Fidelity Advisor Freedom® 2045 Fund Class A        
Trading Symbol FFFZX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2045 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 104 
0.94%
  
       
Expenses Paid, Amount $ 104        
Expense Ratio, Percent 0.94%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,886 $12,349 $12,735 $11,374 $17,675 $18,164 $16,839 $20,364 $21,456 $25,949 Fidelity Freedom 2045 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,720 $18,271 $21,951 $23,389 $27,861 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   13.99% 6.71% 10.00% Class A (without 5.75% sales charge) 20.94% 7.98% 10.66% Fidelity Freedom 2045 Composite Index℠ 19.12% 8.28% 10.79% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802 $ 2,256,608,802
Holdings Count | shares 44 44 44 44 44
Advisory Fees Paid, Amount $ 13,330,281        
Investment Company Portfolio Turnover 16.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,256,608,802
  
Number of Holdings
44
  
Total Advisory Fee
$13,330,281
  
Portfolio Turnover
16%
  
       
Holdings [Text Block]         Domestic Equity Funds 54.2 International Equity Funds 40.2 Bond Funds 5.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 54.2               International Equity Funds - 40.2          Bond Funds - 5.2                           Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 11.1   Fidelity Series Emerging Markets Opportunities Fund 10.3   Fidelity Advisor Series Equity Growth Fund 8.1   Fidelity Series International Value Fund 7.4   Fidelity Series Overseas Fund 7.4   Fidelity Series International Growth Fund 7.4   Fidelity Series Opportunistic Insights Fund 7.0   Fidelity Series Stock Selector Large Cap Value Fund 6.3   Fidelity Series Value Discovery Fund 6.3   Fidelity Advisor Series Growth Opportunities Fund 5.8     77.1          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2040 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2040 Fund        
Class Name Fidelity Advisor Freedom® 2040 Fund Class K6        
Trading Symbol FKGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2040 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 47 
0.43%
  
       
Expenses Paid, Amount $ 47        
Expense Ratio, Percent 0.43%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,912 $11,309 $10,151 $15,850 $16,375 $15,246 $18,389 $19,469 $23,348 Fidelity Freedom 2040 Composite Index℠ $10,000 $10,921 $11,461 $10,454 $15,681 $16,520 $15,300 $18,242 $19,421 $22,860 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 19.92% 8.06% 10.09% Fidelity Freedom 2040 Composite Index℠ 17.71% 7.83% 9.83% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 17,471,178        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,969,331,790
  
Number of Holdings
46
  
Total Advisory Fee
$17,471,178
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 48.6 International Equity Funds 36.7 Bond Funds 14.3 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 48.6               International Equity Funds - 36.7          Bond Funds - 14.3                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 9.9   Fidelity Series Emerging Markets Opportunities Fund 9.3   Fidelity Advisor Series Equity Growth Fund 7.4   Fidelity Series Overseas Fund 6.8   Fidelity Series International Value Fund 6.8   Fidelity Series International Growth Fund 6.8   Fidelity Series Opportunistic Insights Fund 6.2   Fidelity Series Investment Grade Bond Fund 6.0   Fidelity Series Stock Selector Large Cap Value Fund 5.6   Fidelity Series Value Discovery Fund 5.6     70.4          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2040 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2040 Fund        
Class Name Fidelity Advisor Freedom® 2040 Fund Class Z        
Trading Symbol FIJPX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2040 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 68 
0.62%
  
       
Expenses Paid, Amount $ 68        
Expense Ratio, Percent 0.62%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,870 $8,852 $13,792 $14,226 $13,223 $15,921 $16,830 $20,140 Fidelity Freedom 2040 Composite Index℠ $10,000 $9,883 $9,014 $13,522 $14,245 $13,193 $15,730 $16,747 $19,712 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 19.67% 7.87% 9.79% Fidelity Freedom 2040 Composite Index℠ 17.71% 7.83% 9.47% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 17,471,178        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,969,331,790
  
Number of Holdings
46
  
Total Advisory Fee
$17,471,178
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 48.6 International Equity Funds 36.7 Bond Funds 14.3 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 48.6               International Equity Funds - 36.7          Bond Funds - 14.3                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 9.9   Fidelity Series Emerging Markets Opportunities Fund 9.3   Fidelity Advisor Series Equity Growth Fund 7.4   Fidelity Series Overseas Fund 6.8   Fidelity Series International Value Fund 6.8   Fidelity Series International Growth Fund 6.8   Fidelity Series Opportunistic Insights Fund 6.2   Fidelity Series Investment Grade Bond Fund 6.0   Fidelity Series Stock Selector Large Cap Value Fund 5.6   Fidelity Series Value Discovery Fund 5.6     70.4          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2040 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2040 Fund        
Class Name Fidelity Advisor Freedom® 2040 Fund Class M        
Trading Symbol FTFFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2040 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 128 
1.17%
  
       
Expenses Paid, Amount $ 128        
Expense Ratio, Percent 1.17%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $11,123 $12,581 $12,935 $11,533 $17,872 $18,320 $16,936 $20,252 $21,285 $25,326 Fidelity Freedom 2040 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,716 $18,260 $21,771 $23,178 $27,282 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   14.82% 6.46% 9.74% Class M (without 3.50% sales charge) 18.98% 7.22% 10.13% Fidelity Freedom 2040 Composite Index℠ 17.71% 7.83% 10.56% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 17,471,178        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,969,331,790
  
Number of Holdings
46
  
Total Advisory Fee
$17,471,178
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 48.6 International Equity Funds 36.7 Bond Funds 14.3 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 48.6               International Equity Funds - 36.7          Bond Funds - 14.3                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 9.9   Fidelity Series Emerging Markets Opportunities Fund 9.3   Fidelity Advisor Series Equity Growth Fund 7.4   Fidelity Series Overseas Fund 6.8   Fidelity Series International Value Fund 6.8   Fidelity Series International Growth Fund 6.8   Fidelity Series Opportunistic Insights Fund 6.2   Fidelity Series Investment Grade Bond Fund 6.0   Fidelity Series Stock Selector Large Cap Value Fund 5.6   Fidelity Series Value Discovery Fund 5.6     70.4          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2040 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2040 Fund        
Class Name Fidelity Advisor Freedom® 2040 Fund Class I        
Trading Symbol FIFFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2040 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 74 
0.67%
  
       
Expenses Paid, Amount $ 74        
Expense Ratio, Percent 0.67%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,582 $13,173 $13,610 $12,200 $18,994 $19,569 $18,170 $21,850 $23,074 $27,601 Fidelity Freedom 2040 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,716 $18,260 $21,771 $23,178 $27,282 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 19.62% 7.76% 10.69% Fidelity Freedom 2040 Composite Index℠ 17.71% 7.83% 10.56% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 17,471,178        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,969,331,790
  
Number of Holdings
46
  
Total Advisory Fee
$17,471,178
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 48.6 International Equity Funds 36.7 Bond Funds 14.3 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 48.6               International Equity Funds - 36.7          Bond Funds - 14.3                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 9.9   Fidelity Series Emerging Markets Opportunities Fund 9.3   Fidelity Advisor Series Equity Growth Fund 7.4   Fidelity Series Overseas Fund 6.8   Fidelity Series International Value Fund 6.8   Fidelity Series International Growth Fund 6.8   Fidelity Series Opportunistic Insights Fund 6.2   Fidelity Series Investment Grade Bond Fund 6.0   Fidelity Series Stock Selector Large Cap Value Fund 5.6   Fidelity Series Value Discovery Fund 5.6     70.4          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2040 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2040 Fund        
Class Name Fidelity Advisor Freedom® 2040 Fund Class C        
Trading Symbol FCFFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2040 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 182 
1.67%
  
       
Expenses Paid, Amount $ 182        
Expense Ratio, Percent 1.67%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,470 $12,907 $13,213 $11,718 $18,060 $18,417 $16,947 $20,166 $21,243 $25,357 Fidelity Freedom 2040 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,716 $18,260 $21,771 $23,178 $27,282 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 17.47% 6.70% 9.75% Class C 18.47% 6.70% 9.75% Fidelity Freedom 2040 Composite Index℠ 17.71% 7.83% 10.56% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 17,471,178        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,969,331,790
  
Number of Holdings
46
  
Total Advisory Fee
$17,471,178
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 48.6 International Equity Funds 36.7 Bond Funds 14.3 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 48.6               International Equity Funds - 36.7          Bond Funds - 14.3                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 9.9   Fidelity Series Emerging Markets Opportunities Fund 9.3   Fidelity Advisor Series Equity Growth Fund 7.4   Fidelity Series Overseas Fund 6.8   Fidelity Series International Value Fund 6.8   Fidelity Series International Growth Fund 6.8   Fidelity Series Opportunistic Insights Fund 6.2   Fidelity Series Investment Grade Bond Fund 6.0   Fidelity Series Stock Selector Large Cap Value Fund 5.6   Fidelity Series Value Discovery Fund 5.6     70.4          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2040 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2040 Fund        
Class Name Fidelity Advisor Freedom® 2040 Fund Class A        
Trading Symbol FAFFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2040 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 101 
0.92%
  
       
Expenses Paid, Amount $ 101        
Expense Ratio, Percent 0.92%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,889 $12,350 $12,725 $11,378 $17,672 $18,155 $16,828 $20,174 $21,252 $25,368 Fidelity Freedom 2040 Composite Index℠ $10,000 $11,501 $13,034 $13,678 $12,476 $18,715 $19,716 $18,260 $21,771 $23,178 $27,282 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   12.50% 6.23% 9.76% Class A (without 5.75% sales charge) 19.37% 7.50% 10.41% Fidelity Freedom 2040 Composite Index℠ 17.71% 7.83% 10.56% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790 $ 2,969,331,790
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 17,471,178        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,969,331,790
  
Number of Holdings
46
  
Total Advisory Fee
$17,471,178
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Domestic Equity Funds 48.6 International Equity Funds 36.7 Bond Funds 14.3 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 48.6               International Equity Funds - 36.7          Bond Funds - 14.3                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 9.9   Fidelity Series Emerging Markets Opportunities Fund 9.3   Fidelity Advisor Series Equity Growth Fund 7.4   Fidelity Series Overseas Fund 6.8   Fidelity Series International Value Fund 6.8   Fidelity Series International Growth Fund 6.8   Fidelity Series Opportunistic Insights Fund 6.2   Fidelity Series Investment Grade Bond Fund 6.0   Fidelity Series Stock Selector Large Cap Value Fund 5.6   Fidelity Series Value Discovery Fund 5.6     70.4          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2035 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2035 Fund        
Class Name Fidelity Advisor Freedom® 2035 Fund Class K6        
Trading Symbol FHGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2035 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 42 
0.39%
  
       
Expenses Paid, Amount $ 42        
Expense Ratio, Percent 0.39%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,903 $11,301 $10,313 $15,514 $15,898 $14,829 $17,409 $18,406 $21,540 Fidelity Freedom 2035 Composite Index℠ $10,000 $10,906 $11,453 $10,625 $15,344 $15,989 $14,854 $17,281 $18,345 $21,114 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 17.03% 6.78% 9.09% Fidelity Freedom 2035 Composite Index℠ 15.09% 6.59% 8.84% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 17,106,418        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$3,055,791,505
  
Number of Holdings
45
  
Total Advisory Fee
$17,106,418
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Domestic Equity Funds 39.7 International Equity Funds 30.9 Bond Funds 29.0 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 39.7               International Equity Funds - 30.9          Bond Funds - 29.0                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 17.0   Fidelity Series Large Cap Stock Fund 8.1   Fidelity Series Emerging Markets Opportunities Fund 7.9   Fidelity Advisor Series Equity Growth Fund 5.9   Fidelity Series Overseas Fund 5.6   Fidelity Series International Value Fund 5.6   Fidelity Series International Growth Fund 5.6   Fidelity Series Opportunistic Insights Fund 5.1   Fidelity Series Stock Selector Large Cap Value Fund 4.6   Fidelity Series Value Discovery Fund 4.6     70.0          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2035 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2035 Fund        
Class Name Fidelity Advisor Freedom® 2035 Fund Class Z        
Trading Symbol FIJOX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2035 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 64 
0.59%
  
       
Expenses Paid, Amount $ 64        
Expense Ratio, Percent 0.59%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,904 $9,026 $13,555 $13,874 $12,921 $15,144 $15,977 $18,656 Fidelity Freedom 2035 Composite Index℠ $10,000 $9,911 $9,194 $13,278 $13,837 $12,855 $14,954 $15,875 $18,272 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 16.77% 6.60% 8.67% Fidelity Freedom 2035 Composite Index℠ 15.09% 6.59% 8.37% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 17,106,418        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$3,055,791,505
  
Number of Holdings
45
  
Total Advisory Fee
$17,106,418
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Domestic Equity Funds 39.7 International Equity Funds 30.9 Bond Funds 29.0 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 39.7               International Equity Funds - 30.9          Bond Funds - 29.0                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 17.0   Fidelity Series Large Cap Stock Fund 8.1   Fidelity Series Emerging Markets Opportunities Fund 7.9   Fidelity Advisor Series Equity Growth Fund 5.9   Fidelity Series Overseas Fund 5.6   Fidelity Series International Value Fund 5.6   Fidelity Series International Growth Fund 5.6   Fidelity Series Opportunistic Insights Fund 5.1   Fidelity Series Stock Selector Large Cap Value Fund 4.6   Fidelity Series Value Discovery Fund 4.6     70.0          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2035 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2035 Fund        
Class Name Fidelity Advisor Freedom® 2035 Fund Class M        
Trading Symbol FTTHX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2035 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 124 
1.15%
  
       
Expenses Paid, Amount $ 124        
Expense Ratio, Percent 1.15%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $11,120 $12,564 $12,927 $11,717 $17,489 $17,792 $16,476 $19,198 $20,139 $23,386 Fidelity Freedom 2035 Composite Index℠ $10,000 $11,497 $13,009 $13,661 $12,673 $18,301 $19,072 $17,718 $20,612 $21,881 $25,184 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   12.06% 5.23% 8.87% Class M (without 3.50% sales charge) 16.12% 5.98% 9.26% Fidelity Freedom 2035 Composite Index℠ 15.09% 6.59% 9.68% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 17,106,418        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$3,055,791,505
  
Number of Holdings
45
  
Total Advisory Fee
$17,106,418
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Domestic Equity Funds 39.7 International Equity Funds 30.9 Bond Funds 29.0 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 39.7               International Equity Funds - 30.9          Bond Funds - 29.0                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 17.0   Fidelity Series Large Cap Stock Fund 8.1   Fidelity Series Emerging Markets Opportunities Fund 7.9   Fidelity Advisor Series Equity Growth Fund 5.9   Fidelity Series Overseas Fund 5.6   Fidelity Series International Value Fund 5.6   Fidelity Series International Growth Fund 5.6   Fidelity Series Opportunistic Insights Fund 5.1   Fidelity Series Stock Selector Large Cap Value Fund 4.6   Fidelity Series Value Discovery Fund 4.6     70.0          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2035 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2035 Fund        
Class Name Fidelity Advisor Freedom® 2035 Fund Class I        
Trading Symbol FITHX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2035 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 70 
0.65%
  
       
Expenses Paid, Amount $ 70        
Expense Ratio, Percent 0.65%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,579 $13,142 $13,598 $12,387 $18,579 $18,998 $17,680 $20,699 $21,819 $25,472 Fidelity Freedom 2035 Composite Index℠ $10,000 $11,497 $13,009 $13,661 $12,673 $18,301 $19,072 $17,718 $20,612 $21,881 $25,184 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 16.74% 6.51% 9.80% Fidelity Freedom 2035 Composite Index℠ 15.09% 6.59% 9.68% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 17,106,418        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$3,055,791,505
  
Number of Holdings
45
  
Total Advisory Fee
$17,106,418
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Domestic Equity Funds 39.7 International Equity Funds 30.9 Bond Funds 29.0 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 39.7               International Equity Funds - 30.9          Bond Funds - 29.0                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 17.0   Fidelity Series Large Cap Stock Fund 8.1   Fidelity Series Emerging Markets Opportunities Fund 7.9   Fidelity Advisor Series Equity Growth Fund 5.9   Fidelity Series Overseas Fund 5.6   Fidelity Series International Value Fund 5.6   Fidelity Series International Growth Fund 5.6   Fidelity Series Opportunistic Insights Fund 5.1   Fidelity Series Stock Selector Large Cap Value Fund 4.6   Fidelity Series Value Discovery Fund 4.6     70.0          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2035 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2035 Fund        
Class Name Fidelity Advisor Freedom® 2035 Fund Class C        
Trading Symbol FCTHX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2035 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 177 
1.65%
  
       
Expenses Paid, Amount $ 177        
Expense Ratio, Percent 1.65%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,469 $12,891 $13,200 $11,901 $17,686 $17,894 $16,487 $19,108 $20,089 $23,381 Fidelity Freedom 2035 Composite Index℠ $10,000 $11,497 $13,009 $13,661 $12,673 $18,301 $19,072 $17,718 $20,612 $21,881 $25,184 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 14.55% 5.45% 8.86% Class C 15.55% 5.45% 8.86% Fidelity Freedom 2035 Composite Index℠ 15.09% 6.59% 9.68% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 17,106,418        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$3,055,791,505
  
Number of Holdings
45
  
Total Advisory Fee
$17,106,418
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Domestic Equity Funds 39.7 International Equity Funds 30.9 Bond Funds 29.0 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 39.7               International Equity Funds - 30.9          Bond Funds - 29.0                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 17.0   Fidelity Series Large Cap Stock Fund 8.1   Fidelity Series Emerging Markets Opportunities Fund 7.9   Fidelity Advisor Series Equity Growth Fund 5.9   Fidelity Series Overseas Fund 5.6   Fidelity Series International Value Fund 5.6   Fidelity Series International Growth Fund 5.6   Fidelity Series Opportunistic Insights Fund 5.1   Fidelity Series Stock Selector Large Cap Value Fund 4.6   Fidelity Series Value Discovery Fund 4.6     70.0          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2035 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2035 Fund        
Class Name Fidelity Advisor Freedom® 2035 Fund Class A        
Trading Symbol FATHX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2035 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 97 
0.90%
  
       
Expenses Paid, Amount $ 97        
Expense Ratio, Percent 0.90%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,887 $12,330 $12,723 $11,559 $17,307 $17,644 $16,377 $19,135 $20,118 $23,413 Fidelity Freedom 2035 Composite Index℠ $10,000 $11,497 $13,009 $13,661 $12,673 $18,301 $19,072 $17,718 $20,612 $21,881 $25,184 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   9.69% 4.98% 8.88% Class A (without 5.75% sales charge) 16.38% 6.23% 9.53% Fidelity Freedom 2035 Composite Index℠ 15.09% 6.59% 9.68% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505 $ 3,055,791,505
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 17,106,418        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$3,055,791,505
  
Number of Holdings
45
  
Total Advisory Fee
$17,106,418
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Domestic Equity Funds 39.7 International Equity Funds 30.9 Bond Funds 29.0 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 39.7               International Equity Funds - 30.9          Bond Funds - 29.0                          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 17.0   Fidelity Series Large Cap Stock Fund 8.1   Fidelity Series Emerging Markets Opportunities Fund 7.9   Fidelity Advisor Series Equity Growth Fund 5.9   Fidelity Series Overseas Fund 5.6   Fidelity Series International Value Fund 5.6   Fidelity Series International Growth Fund 5.6   Fidelity Series Opportunistic Insights Fund 5.1   Fidelity Series Stock Selector Large Cap Value Fund 4.6   Fidelity Series Value Discovery Fund 4.6     70.0          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2030 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2030 Fund        
Class Name Fidelity Advisor Freedom® 2030 Fund Class K6        
Trading Symbol FDGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2030 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 39 
0.36%
  
       
Expenses Paid, Amount $ 39        
Expense Ratio, Percent 0.36%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,790 $11,204 $10,514 $14,839 $15,070 $14,090 $16,115 $17,028 $19,625 Fidelity Freedom 2030 Composite Index℠ $10,000 $10,779 $11,330 $10,842 $14,701 $15,123 $14,099 $16,025 $16,972 $19,263 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 15.25% 5.75% 7.94% Fidelity Freedom 2030 Composite Index℠ 13.50% 5.55% 7.71% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 16,289,707        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,981,641,828
  
Number of Holdings
45
  
Total Advisory Fee
$16,289,707
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 37.0 Domestic Equity Funds 34.9 International Equity Funds 27.7 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 37.0                          Domestic Equity Funds - 34.9               International Equity Funds - 27.7          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 20.9   Fidelity Series Emerging Markets Opportunities Fund 7.1   Fidelity Series Large Cap Stock Fund 7.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.3   Fidelity Advisor Series Equity Growth Fund 5.2   Fidelity Series Overseas Fund 5.0   Fidelity Series International Value Fund 5.0   Fidelity Series International Growth Fund 5.0   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Opportunistic Insights Fund 4.5     70.8          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2030 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2030 Fund        
Class Name Fidelity Advisor Freedom® 2030 Fund Class Z        
Trading Symbol FIJNX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2030 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 59 
0.55%
  
       
Expenses Paid, Amount $ 59        
Expense Ratio, Percent 0.55%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $9,991 $9,364 $13,203 $13,385 $12,500 $14,276 $15,045 $17,308 Fidelity Freedom 2030 Composite Index℠ $10,000 $10,006 $9,575 $12,983 $13,355 $12,451 $14,152 $14,989 $17,012 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 15.05% 5.56% 7.59% Fidelity Freedom 2030 Composite Index℠ 13.50% 5.55% 7.34% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 16,289,707        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,981,641,828
  
Number of Holdings
45
  
Total Advisory Fee
$16,289,707
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 37.0 Domestic Equity Funds 34.9 International Equity Funds 27.7 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 37.0                          Domestic Equity Funds - 34.9               International Equity Funds - 27.7          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 20.9   Fidelity Series Emerging Markets Opportunities Fund 7.1   Fidelity Series Large Cap Stock Fund 7.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.3   Fidelity Advisor Series Equity Growth Fund 5.2   Fidelity Series Overseas Fund 5.0   Fidelity Series International Value Fund 5.0   Fidelity Series International Growth Fund 5.0   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Opportunistic Insights Fund 4.5     70.8          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2030 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2030 Fund        
Class Name Fidelity Advisor Freedom® 2030 Fund Class M        
Trading Symbol FTFEX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2030 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 119 
1.11%
  
       
Expenses Paid, Amount $ 119        
Expense Ratio, Percent 1.11%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $10,976 $12,242 $12,623 $11,760 $16,483 $16,616 $15,419 $17,509 $18,351 $20,986 Fidelity Freedom 2030 Composite Index℠ $10,000 $11,323 $12,634 $13,279 $12,708 $17,230 $17,724 $16,525 $18,782 $19,892 $22,577 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   10.36% 4.20% 7.69% Class M (without 3.50% sales charge) 14.36% 4.95% 8.08% Fidelity Freedom 2030 Composite Index℠ 13.50% 5.55% 8.48% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 16,289,707        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,981,641,828
  
Number of Holdings
45
  
Total Advisory Fee
$16,289,707
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 37.0 Domestic Equity Funds 34.9 International Equity Funds 27.7 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 37.0                          Domestic Equity Funds - 34.9               International Equity Funds - 27.7          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 20.9   Fidelity Series Emerging Markets Opportunities Fund 7.1   Fidelity Series Large Cap Stock Fund 7.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.3   Fidelity Advisor Series Equity Growth Fund 5.2   Fidelity Series Overseas Fund 5.0   Fidelity Series International Value Fund 5.0   Fidelity Series International Growth Fund 5.0   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Opportunistic Insights Fund 4.5     70.8          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2030 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2030 Fund        
Class Name Fidelity Advisor Freedom® 2030 Fund Class I        
Trading Symbol FEFIX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2030 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 66 
0.61%
  
       
Expenses Paid, Amount $ 66        
Expense Ratio, Percent 0.61%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,438 $12,815 $13,282 $12,442 $17,514 $17,754 $16,555 $18,897 $19,892 $22,878 Fidelity Freedom 2030 Composite Index℠ $10,000 $11,323 $12,634 $13,279 $12,708 $17,230 $17,724 $16,525 $18,782 $19,892 $22,577 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 15.01% 5.49% 8.63% Fidelity Freedom 2030 Composite Index℠ 13.50% 5.55% 8.48% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 16,289,707        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,981,641,828
  
Number of Holdings
45
  
Total Advisory Fee
$16,289,707
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 37.0 Domestic Equity Funds 34.9 International Equity Funds 27.7 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 37.0                          Domestic Equity Funds - 34.9               International Equity Funds - 27.7          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 20.9   Fidelity Series Emerging Markets Opportunities Fund 7.1   Fidelity Series Large Cap Stock Fund 7.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.3   Fidelity Advisor Series Equity Growth Fund 5.2   Fidelity Series Overseas Fund 5.0   Fidelity Series International Value Fund 5.0   Fidelity Series International Growth Fund 5.0   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Opportunistic Insights Fund 4.5     70.8          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2030 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2030 Fund        
Class Name Fidelity Advisor Freedom® 2030 Fund Class C        
Trading Symbol FCFEX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2030 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 173 
1.61%
  
       
Expenses Paid, Amount $ 173        
Expense Ratio, Percent 1.61%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,321 $12,563 $12,886 $11,952 $16,663 $16,712 $15,440 $17,443 $18,331 $21,020 Fidelity Freedom 2030 Composite Index℠ $10,000 $11,323 $12,634 $13,279 $12,708 $17,230 $17,724 $16,525 $18,782 $19,892 $22,577 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 12.80% 4.42% 7.71% Class C 13.80% 4.42% 7.71% Fidelity Freedom 2030 Composite Index℠ 13.50% 5.55% 8.48% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 16,289,707        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,981,641,828
  
Number of Holdings
45
  
Total Advisory Fee
$16,289,707
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 37.0 Domestic Equity Funds 34.9 International Equity Funds 27.7 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 37.0                          Domestic Equity Funds - 34.9               International Equity Funds - 27.7          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 20.9   Fidelity Series Emerging Markets Opportunities Fund 7.1   Fidelity Series Large Cap Stock Fund 7.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.3   Fidelity Advisor Series Equity Growth Fund 5.2   Fidelity Series Overseas Fund 5.0   Fidelity Series International Value Fund 5.0   Fidelity Series International Growth Fund 5.0   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Opportunistic Insights Fund 4.5     70.8          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2030 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2030 Fund        
Class Name Fidelity Advisor Freedom® 2030 Fund Class A        
Trading Symbol FAFEX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2030 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 93 
0.86%
  
       
Expenses Paid, Amount $ 93        
Expense Ratio, Percent 0.86%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,746 $12,014 $12,425 $11,604 $16,305 $16,475 $15,329 $17,445 $18,333 $21,023 Fidelity Freedom 2030 Composite Index℠ $10,000 $11,323 $12,634 $13,279 $12,708 $17,230 $17,724 $16,525 $18,782 $19,892 $22,577 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   8.08% 3.98% 7.71% Class A (without 5.75% sales charge) 14.67% 5.21% 8.35% Fidelity Freedom 2030 Composite Index℠ 13.50% 5.55% 8.48% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828 $ 2,981,641,828
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 16,289,707        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$2,981,641,828
  
Number of Holdings
45
  
Total Advisory Fee
$16,289,707
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 37.0 Domestic Equity Funds 34.9 International Equity Funds 27.7 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 37.0                          Domestic Equity Funds - 34.9               International Equity Funds - 27.7          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 20.9   Fidelity Series Emerging Markets Opportunities Fund 7.1   Fidelity Series Large Cap Stock Fund 7.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.3   Fidelity Advisor Series Equity Growth Fund 5.2   Fidelity Series Overseas Fund 5.0   Fidelity Series International Value Fund 5.0   Fidelity Series International Growth Fund 5.0   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Opportunistic Insights Fund 4.5     70.8          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2025 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2025 Fund        
Class Name Fidelity Advisor Freedom® 2025 Fund Class K6        
Trading Symbol FPGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2025 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 34 
0.32%
  
       
Expenses Paid, Amount $ 34        
Expense Ratio, Percent 0.32%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,661 $11,071 $10,548 $14,326 $14,479 $13,526 $15,241 $16,090 $18,346 Fidelity Freedom 2025 Composite Index℠ $10,000 $10,645 $11,175 $10,874 $14,203 $14,522 $13,539 $15,179 $16,061 $18,043 S&P 500® Index $10,000 $11,044 $12,093 $11,249 $17,589 $20,341 $18,769 $24,377 $26,388 $31,086   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 14.03% 5.07% 7.12% Fidelity Freedom 2025 Composite Index℠ 12.34% 4.90% 6.92% S&P 500® Index 17.80% 12.06% 13.72% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 10,598,312        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,972,528,601
  
Number of Holdings
45
  
Total Advisory Fee
$10,598,312
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 43.4 Domestic Equity Funds 31.1 International Equity Funds 25.1 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 43.4                          Domestic Equity Funds - 31.1               International Equity Funds - 25.1          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 24.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 8.9   Fidelity Series Emerging Markets Opportunities Fund 6.5   Fidelity Series Large Cap Stock Fund 6.3   Fidelity Series International Developed Markets Bond Index Fund 4.8   Fidelity Advisor Series Equity Growth Fund 4.6   Fidelity Series Overseas Fund 4.5   Fidelity Series International Value Fund 4.5   Fidelity Series International Growth Fund 4.4   Fidelity Series Opportunistic Insights Fund 4.0     72.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2025 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2025 Fund        
Class Name Fidelity Advisor Freedom® 2025 Fund Class Z        
Trading Symbol FIJMX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2025 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 55 
0.52%
  
       
Expenses Paid, Amount $ 55        
Expense Ratio, Percent 0.52%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,056 $9,577 $12,991 $13,114 $12,239 $13,769 $14,504 $16,507 Fidelity Freedom 2025 Composite Index℠ $10,000 $10,071 $9,800 $12,800 $13,088 $12,202 $13,680 $14,475 $16,261 S&P 500® Index $10,000 $9,796 $9,113 $14,248 $16,477 $15,203 $19,746 $21,376 $25,181   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 13.81% 4.91% 6.91% Fidelity Freedom 2025 Composite Index℠ 12.34% 4.90% 6.70% S&P 500® Index 17.80% 12.06% 13.11% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 10,598,312        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,972,528,601
  
Number of Holdings
45
  
Total Advisory Fee
$10,598,312
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 43.4 Domestic Equity Funds 31.1 International Equity Funds 25.1 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 43.4                          Domestic Equity Funds - 31.1               International Equity Funds - 25.1          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 24.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 8.9   Fidelity Series Emerging Markets Opportunities Fund 6.5   Fidelity Series Large Cap Stock Fund 6.3   Fidelity Series International Developed Markets Bond Index Fund 4.8   Fidelity Advisor Series Equity Growth Fund 4.6   Fidelity Series Overseas Fund 4.5   Fidelity Series International Value Fund 4.5   Fidelity Series International Growth Fund 4.4   Fidelity Series Opportunistic Insights Fund 4.0     72.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2025 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2025 Fund        
Class Name Fidelity Advisor Freedom® 2025 Fund Class M        
Trading Symbol FTTWX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2025 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 116 
1.09%
  
       
Expenses Paid, Amount $ 116        
Expense Ratio, Percent 1.09%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $10,779 $11,824 $12,189 $11,542 $15,565 $15,624 $14,498 $16,211 $16,982 $19,208 Fidelity Freedom 2025 Composite Index℠ $10,000 $11,085 $12,168 $12,774 $12,430 $16,236 $16,601 $15,476 $17,352 $18,359 $20,625 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   9.15% 3.55% 6.74% Class M (without 3.50% sales charge) 13.11% 4.30% 7.13% Fidelity Freedom 2025 Composite Index℠ 12.34% 4.90% 7.51% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 10,598,312        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,972,528,601
  
Number of Holdings
45
  
Total Advisory Fee
$10,598,312
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 43.4 Domestic Equity Funds 31.1 International Equity Funds 25.1 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 43.4                          Domestic Equity Funds - 31.1               International Equity Funds - 25.1          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 24.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 8.9   Fidelity Series Emerging Markets Opportunities Fund 6.5   Fidelity Series Large Cap Stock Fund 6.3   Fidelity Series International Developed Markets Bond Index Fund 4.8   Fidelity Advisor Series Equity Growth Fund 4.6   Fidelity Series Overseas Fund 4.5   Fidelity Series International Value Fund 4.5   Fidelity Series International Growth Fund 4.4   Fidelity Series Opportunistic Insights Fund 4.0     72.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2025 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2025 Fund        
Class Name Fidelity Advisor Freedom® 2025 Fund Class I        
Trading Symbol FITWX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2025 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 63 
0.59%
  
       
Expenses Paid, Amount $ 63        
Expense Ratio, Percent 0.59%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,226 $12,377 $12,826 $12,199 $16,538 $16,685 $15,548 $17,480 $18,407 $20,934 Fidelity Freedom 2025 Composite Index℠ $10,000 $11,085 $12,168 $12,774 $12,430 $16,236 $16,601 $15,476 $17,352 $18,359 $20,625 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 13.73% 4.83% 7.67% Fidelity Freedom 2025 Composite Index℠ 12.34% 4.90% 7.51% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 10,598,312        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,972,528,601
  
Number of Holdings
45
  
Total Advisory Fee
$10,598,312
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 43.4 Domestic Equity Funds 31.1 International Equity Funds 25.1 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 43.4                          Domestic Equity Funds - 31.1               International Equity Funds - 25.1          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 24.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 8.9   Fidelity Series Emerging Markets Opportunities Fund 6.5   Fidelity Series Large Cap Stock Fund 6.3   Fidelity Series International Developed Markets Bond Index Fund 4.8   Fidelity Advisor Series Equity Growth Fund 4.6   Fidelity Series Overseas Fund 4.5   Fidelity Series International Value Fund 4.5   Fidelity Series International Growth Fund 4.4   Fidelity Series Opportunistic Insights Fund 4.0     72.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2025 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2025 Fund        
Class Name Fidelity Advisor Freedom® 2025 Fund Class C        
Trading Symbol FCTWX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2025 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 169 
1.59%
  
       
Expenses Paid, Amount $ 169        
Expense Ratio, Percent 1.59%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,113 $12,129 $12,443 $11,714 $15,730 $15,711 $14,499 $16,133 $16,945 $19,217 Fidelity Freedom 2025 Composite Index℠ $10,000 $11,085 $12,168 $12,774 $12,430 $16,236 $16,601 $15,476 $17,352 $18,359 $20,625 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 11.52% 3.77% 6.75% Class C 12.52% 3.77% 6.75% Fidelity Freedom 2025 Composite Index℠ 12.34% 4.90% 7.51% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 10,598,312        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,972,528,601
  
Number of Holdings
45
  
Total Advisory Fee
$10,598,312
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 43.4 Domestic Equity Funds 31.1 International Equity Funds 25.1 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 43.4                          Domestic Equity Funds - 31.1               International Equity Funds - 25.1          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 24.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 8.9   Fidelity Series Emerging Markets Opportunities Fund 6.5   Fidelity Series Large Cap Stock Fund 6.3   Fidelity Series International Developed Markets Bond Index Fund 4.8   Fidelity Advisor Series Equity Growth Fund 4.6   Fidelity Series Overseas Fund 4.5   Fidelity Series International Value Fund 4.5   Fidelity Series International Growth Fund 4.4   Fidelity Series Opportunistic Insights Fund 4.0     72.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2025 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2025 Fund        
Class Name Fidelity Advisor Freedom® 2025 Fund Class A        
Trading Symbol FATWX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2025 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 90 
0.84%
  
       
Expenses Paid, Amount $ 90        
Expense Ratio, Percent 0.84%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,556 $11,607 $11,995 $11,384 $15,393 $15,492 $14,399 $16,153 $16,966 $19,241 Fidelity Freedom 2025 Composite Index℠ $10,000 $11,085 $12,168 $12,774 $12,430 $16,236 $16,601 $15,476 $17,352 $18,359 $20,625 S&P 500® Index $10,000 $11,717 $13,357 $14,625 $13,605 $21,271 $24,599 $22,698 $29,480 $31,913 $37,594   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   6.89% 3.33% 6.76% Class A (without 5.75% sales charge) 13.41% 4.56% 7.40% Fidelity Freedom 2025 Composite Index℠ 12.34% 4.90% 7.51% S&P 500® Index 17.80% 12.06% 14.16%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601 $ 1,972,528,601
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 10,598,312        
Investment Company Portfolio Turnover 19.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,972,528,601
  
Number of Holdings
45
  
Total Advisory Fee
$10,598,312
  
Portfolio Turnover
19%
  
       
Holdings [Text Block]         Bond Funds 43.4 Domestic Equity Funds 31.1 International Equity Funds 25.1 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 43.4                          Domestic Equity Funds - 31.1               International Equity Funds - 25.1          Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 24.1   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 8.9   Fidelity Series Emerging Markets Opportunities Fund 6.5   Fidelity Series Large Cap Stock Fund 6.3   Fidelity Series International Developed Markets Bond Index Fund 4.8   Fidelity Advisor Series Equity Growth Fund 4.6   Fidelity Series Overseas Fund 4.5   Fidelity Series International Value Fund 4.5   Fidelity Series International Growth Fund 4.4   Fidelity Series Opportunistic Insights Fund 4.0     72.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2020 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2020 Fund        
Class Name Fidelity Advisor Freedom® 2020 Fund Class K6        
Trading Symbol FOGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2020 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 30 
0.28%
  
       
Expenses Paid, Amount $ 30        
Expense Ratio, Percent 0.28%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,608 $11,008 $10,598 $13,984 $14,080 $13,178 $14,644 $15,465 $17,421 Fidelity Freedom 2020 Composite Index℠ $10,000 $10,587 $11,107 $10,932 $13,875 $14,116 $13,200 $14,614 $15,456 $17,168 Bloomberg U.S. Aggregate Bond Index $10,000 $9,938 $10,384 $11,311 $11,392 $10,919 $10,396 $10,573 $11,089 $11,571   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 12.65% 4.49% 6.49% Fidelity Freedom 2020 Composite Index℠ 11.08% 4.35% 6.32% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.67% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 5,346,237        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,039,651,935
  
Number of Holdings
46
  
Total Advisory Fee
$5,346,237
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Bond Funds 49.1 Domestic Equity Funds 26.6 International Equity Funds 21.7 Short-Term Funds 2.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 49.1                          Domestic Equity Funds - 26.6               International Equity Funds - 21.7          Short-Term Funds - 2.2                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 27.8   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.5   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 6.2   Fidelity Series Emerging Markets Opportunities Fund 5.6   Fidelity Series Large Cap Stock Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Advisor Series Equity Growth Fund 3.9   Fidelity Series Overseas Fund 3.8   Fidelity Series International Value Fund 3.8   Fidelity Series International Growth Fund 3.8     71.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2020 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2020 Fund        
Class Name Fidelity Advisor Freedom® 2020 Fund Class Z        
Trading Symbol FIJLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2020 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 51 
0.48%
  
       
Expenses Paid, Amount $ 51        
Expense Ratio, Percent 0.48%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,091 $9,705 $12,794 $12,868 $12,034 $13,357 $14,071 $15,814 Fidelity Freedom 2020 Composite Index℠ $10,000 $10,103 $9,944 $12,621 $12,841 $12,008 $13,294 $14,059 $15,617 Bloomberg U.S. Aggregate Bond Index $10,000 $10,460 $11,395 $11,476 $10,999 $10,473 $10,651 $11,171 $11,657   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 12.39% 4.33% 6.30% Fidelity Freedom 2020 Composite Index℠ 11.08% 4.35% 6.12% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 2.07% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 5,346,237        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,039,651,935
  
Number of Holdings
46
  
Total Advisory Fee
$5,346,237
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Bond Funds 49.1 Domestic Equity Funds 26.6 International Equity Funds 21.7 Short-Term Funds 2.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 49.1                          Domestic Equity Funds - 26.6               International Equity Funds - 21.7          Short-Term Funds - 2.2                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 27.8   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.5   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 6.2   Fidelity Series Emerging Markets Opportunities Fund 5.6   Fidelity Series Large Cap Stock Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Advisor Series Equity Growth Fund 3.9   Fidelity Series Overseas Fund 3.8   Fidelity Series International Value Fund 3.8   Fidelity Series International Growth Fund 3.8     71.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2020 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2020 Fund        
Class Name Fidelity Advisor Freedom® 2020 Fund Class M        
Trading Symbol FDTFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2020 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 111 
1.05%
  
       
Expenses Paid, Amount $ 111        
Expense Ratio, Percent 1.05%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $10,693 $11,653 $12,011 $11,484 $15,053 $15,051 $13,996 $15,445 $16,176 $18,078 Fidelity Freedom 2020 Composite Index℠ $10,000 $10,985 $11,972 $12,560 $12,362 $15,690 $15,962 $14,927 $16,526 $17,478 $19,413 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   7.84% 2.99% 6.10% Class M (without 3.50% sales charge) 11.75% 3.73% 6.48% Fidelity Freedom 2020 Composite Index℠ 11.08% 4.35% 6.86% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 5,346,237        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,039,651,935
  
Number of Holdings
46
  
Total Advisory Fee
$5,346,237
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Bond Funds 49.1 Domestic Equity Funds 26.6 International Equity Funds 21.7 Short-Term Funds 2.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 49.1                          Domestic Equity Funds - 26.6               International Equity Funds - 21.7          Short-Term Funds - 2.2                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 27.8   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.5   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 6.2   Fidelity Series Emerging Markets Opportunities Fund 5.6   Fidelity Series Large Cap Stock Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Advisor Series Equity Growth Fund 3.9   Fidelity Series Overseas Fund 3.8   Fidelity Series International Value Fund 3.8   Fidelity Series International Growth Fund 3.8     71.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2020 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2020 Fund        
Class Name Fidelity Advisor Freedom® 2020 Fund Class I        
Trading Symbol FDIFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2020 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 58 
0.55%
  
       
Expenses Paid, Amount $ 58        
Expense Ratio, Percent 0.55%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,136 $12,188 $12,628 $12,140 $15,988 $16,074 $15,024 $16,657 $17,537 $19,684 Fidelity Freedom 2020 Composite Index℠ $10,000 $10,985 $11,972 $12,560 $12,362 $15,690 $15,962 $14,927 $16,526 $17,478 $19,413 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 12.24% 4.25% 7.01% Fidelity Freedom 2020 Composite Index℠ 11.08% 4.35% 6.86% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 5,346,237        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,039,651,935
  
Number of Holdings
46
  
Total Advisory Fee
$5,346,237
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Bond Funds 49.1 Domestic Equity Funds 26.6 International Equity Funds 21.7 Short-Term Funds 2.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 49.1                          Domestic Equity Funds - 26.6               International Equity Funds - 21.7          Short-Term Funds - 2.2                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 27.8   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.5   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 6.2   Fidelity Series Emerging Markets Opportunities Fund 5.6   Fidelity Series Large Cap Stock Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Advisor Series Equity Growth Fund 3.9   Fidelity Series Overseas Fund 3.8   Fidelity Series International Value Fund 3.8   Fidelity Series International Growth Fund 3.8     71.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2020 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2020 Fund        
Class Name Fidelity Advisor Freedom® 2020 Fund Class C        
Trading Symbol FDCFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2020 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 163 
1.55%
  
       
Expenses Paid, Amount $ 163        
Expense Ratio, Percent 1.55%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $11,026 $11,958 $12,262 $11,672 $15,217 $15,145 $14,012 $15,382 $16,160 $18,099 Fidelity Freedom 2020 Composite Index℠ $10,000 $10,985 $11,972 $12,560 $12,362 $15,690 $15,962 $14,927 $16,526 $17,478 $19,413 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 10.17% 3.21% 6.11% Class C 11.17% 3.21% 6.11% Fidelity Freedom 2020 Composite Index℠ 11.08% 4.35% 6.86% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 5,346,237        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,039,651,935
  
Number of Holdings
46
  
Total Advisory Fee
$5,346,237
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Bond Funds 49.1 Domestic Equity Funds 26.6 International Equity Funds 21.7 Short-Term Funds 2.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 49.1                          Domestic Equity Funds - 26.6               International Equity Funds - 21.7          Short-Term Funds - 2.2                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 27.8   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.5   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 6.2   Fidelity Series Emerging Markets Opportunities Fund 5.6   Fidelity Series Large Cap Stock Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Advisor Series Equity Growth Fund 3.9   Fidelity Series Overseas Fund 3.8   Fidelity Series International Value Fund 3.8   Fidelity Series International Growth Fund 3.8     71.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2020 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2020 Fund        
Class Name Fidelity Advisor Freedom® 2020 Fund Class A        
Trading Symbol FDAFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2020 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 85 
0.80%
  
       
Expenses Paid, Amount $ 85        
Expense Ratio, Percent 0.80%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,478 $11,436 $11,825 $11,334 $14,891 $14,929 $13,913 $15,387 $16,166 $18,106 Fidelity Freedom 2020 Composite Index℠ $10,000 $10,985 $11,972 $12,560 $12,362 $15,690 $15,962 $14,927 $16,526 $17,478 $19,413 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   5.56% 2.76% 6.12% Class A (without 5.75% sales charge) 12.00% 3.99% 6.75% Fidelity Freedom 2020 Composite Index℠ 11.08% 4.35% 6.86% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935 $ 1,039,651,935
Holdings Count | shares 46 46 46 46 46
Advisory Fees Paid, Amount $ 5,346,237        
Investment Company Portfolio Turnover 17.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$1,039,651,935
  
Number of Holdings
46
  
Total Advisory Fee
$5,346,237
  
Portfolio Turnover
17%
  
       
Holdings [Text Block]         Bond Funds 49.1 Domestic Equity Funds 26.6 International Equity Funds 21.7 Short-Term Funds 2.2 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 49.1                          Domestic Equity Funds - 26.6               International Equity Funds - 21.7          Short-Term Funds - 2.2                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 27.8   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 6.5   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 6.2   Fidelity Series Emerging Markets Opportunities Fund 5.6   Fidelity Series Large Cap Stock Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Advisor Series Equity Growth Fund 3.9   Fidelity Series Overseas Fund 3.8   Fidelity Series International Value Fund 3.8   Fidelity Series International Growth Fund 3.8     71.3          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2015 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2015 Fund        
Class Name Fidelity Advisor Freedom® 2015 Fund Class K6        
Trading Symbol FIGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2015 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 27 
0.26%
  
       
Expenses Paid, Amount $ 27        
Expense Ratio, Percent 0.26%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,542 $10,943 $10,681 $13,547 $13,590 $12,817 $14,021 $14,816 $16,441 Fidelity Freedom 2015 Composite Index℠ $10,000 $10,523 $11,030 $11,014 $13,462 $13,618 $12,848 $14,023 $14,823 $16,245 Bloomberg U.S. Aggregate Bond Index $10,000 $9,938 $10,384 $11,311 $11,392 $10,919 $10,396 $10,573 $11,089 $11,571   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 10.97% 3.95% 5.80% Fidelity Freedom 2015 Composite Index℠ 9.59% 3.83% 5.65% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.67% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 1,944,056        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$407,173,770
  
Number of Holdings
45
  
Total Advisory Fee
$1,944,056
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Bond Funds 54.3 Domestic Equity Funds 22.1 International Equity Funds 18.6 Short-Term Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 54.3                          Domestic Equity Funds - 22.1               International Equity Funds - 18.6          Short-Term Funds - 4.6                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 30.2   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 11.7   Fidelity Series Emerging Markets Opportunities Fund 4.9   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Large Cap Stock Fund 4.3   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 3.9   Fidelity Series Government Money Market Fund 3.9   Fidelity Series Overseas Fund 3.1   Fidelity Series International Value Fund 3.1   Fidelity Series International Growth Fund 3.1     72.9          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2015 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2015 Fund        
Class Name Fidelity Advisor Freedom® 2015 Fund Class Z        
Trading Symbol FIJKX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2015 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 47 
0.45%
  
       
Expenses Paid, Amount $ 47        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,129 $9,878 $12,527 $12,558 $11,832 $12,915 $13,616 $15,077 Fidelity Freedom 2015 Composite Index℠ $10,000 $10,139 $10,125 $12,376 $12,519 $11,811 $12,891 $13,627 $14,934 Bloomberg U.S. Aggregate Bond Index $10,000 $10,460 $11,395 $11,476 $10,999 $10,473 $10,651 $11,171 $11,657   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 10.73% 3.77% 5.63% Fidelity Freedom 2015 Composite Index℠ 9.59% 3.83% 5.49% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 2.07% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 1,944,056        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$407,173,770
  
Number of Holdings
45
  
Total Advisory Fee
$1,944,056
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Bond Funds 54.3 Domestic Equity Funds 22.1 International Equity Funds 18.6 Short-Term Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 54.3                          Domestic Equity Funds - 22.1               International Equity Funds - 18.6          Short-Term Funds - 4.6                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 30.2   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 11.7   Fidelity Series Emerging Markets Opportunities Fund 4.9   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Large Cap Stock Fund 4.3   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 3.9   Fidelity Series Government Money Market Fund 3.9   Fidelity Series Overseas Fund 3.1   Fidelity Series International Value Fund 3.1   Fidelity Series International Growth Fund 3.1     72.9          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2015 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2015 Fund        
Class Name Fidelity Advisor Freedom® 2015 Fund Class M        
Trading Symbol FFVTX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2015 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 105 
1.00%
  
       
Expenses Paid, Amount $ 105        
Expense Ratio, Percent 1.00%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $10,613 $11,473 $11,818 $11,464 $14,460 $14,409 $13,500 $14,664 $15,365 $16,919 Fidelity Freedom 2015 Composite Index℠ $10,000 $10,888 $11,772 $12,339 $12,321 $15,060 $15,235 $14,373 $15,688 $16,583 $18,173 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   6.26% 2.46% 5.40% Class M (without 3.50% sales charge) 10.11% 3.19% 5.78% Fidelity Freedom 2015 Composite Index℠ 9.59% 3.83% 6.16% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 1,944,056        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$407,173,770
  
Number of Holdings
45
  
Total Advisory Fee
$1,944,056
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Bond Funds 54.3 Domestic Equity Funds 22.1 International Equity Funds 18.6 Short-Term Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 54.3                          Domestic Equity Funds - 22.1               International Equity Funds - 18.6          Short-Term Funds - 4.6                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 30.2   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 11.7   Fidelity Series Emerging Markets Opportunities Fund 4.9   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Large Cap Stock Fund 4.3   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 3.9   Fidelity Series Government Money Market Fund 3.9   Fidelity Series Overseas Fund 3.1   Fidelity Series International Value Fund 3.1   Fidelity Series International Growth Fund 3.1     72.9          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2015 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2015 Fund        
Class Name Fidelity Advisor Freedom® 2015 Fund Class I        
Trading Symbol FFVIX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2015 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 53 
0.50%
  
       
Expenses Paid, Amount $ 53        
Expense Ratio, Percent 0.50%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $11,053 $12,010 $12,436 $12,125 $15,364 $15,396 $14,497 $15,820 $16,667 $18,437 Fidelity Freedom 2015 Composite Index℠ $10,000 $10,888 $11,772 $12,339 $12,321 $15,060 $15,235 $14,373 $15,688 $16,583 $18,173 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 10.62% 3.71% 6.31% Fidelity Freedom 2015 Composite Index℠ 9.59% 3.83% 6.16% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 1,944,056        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$407,173,770
  
Number of Holdings
45
  
Total Advisory Fee
$1,944,056
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Bond Funds 54.3 Domestic Equity Funds 22.1 International Equity Funds 18.6 Short-Term Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 54.3                          Domestic Equity Funds - 22.1               International Equity Funds - 18.6          Short-Term Funds - 4.6                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 30.2   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 11.7   Fidelity Series Emerging Markets Opportunities Fund 4.9   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Large Cap Stock Fund 4.3   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 3.9   Fidelity Series Government Money Market Fund 3.9   Fidelity Series Overseas Fund 3.1   Fidelity Series International Value Fund 3.1   Fidelity Series International Growth Fund 3.1     72.9          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2015 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2015 Fund        
Class Name Fidelity Advisor Freedom® 2015 Fund Class C        
Trading Symbol FFVCX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2015 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 157 
1.50%
  
       
Expenses Paid, Amount $ 157        
Expense Ratio, Percent 1.50%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $10,933 $11,760 $12,065 $11,645 $14,598 $14,490 $13,501 $14,588 $15,328 $16,915 Fidelity Freedom 2015 Composite Index℠ $10,000 $10,888 $11,772 $12,339 $12,321 $15,060 $15,235 $14,373 $15,688 $16,583 $18,173 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 8.65% 2.70% 5.40% Class C 9.65% 2.70% 5.40% Fidelity Freedom 2015 Composite Index℠ 9.59% 3.83% 6.16% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 1,944,056        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$407,173,770
  
Number of Holdings
45
  
Total Advisory Fee
$1,944,056
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Bond Funds 54.3 Domestic Equity Funds 22.1 International Equity Funds 18.6 Short-Term Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 54.3                          Domestic Equity Funds - 22.1               International Equity Funds - 18.6          Short-Term Funds - 4.6                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 30.2   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 11.7   Fidelity Series Emerging Markets Opportunities Fund 4.9   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Large Cap Stock Fund 4.3   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 3.9   Fidelity Series Government Money Market Fund 3.9   Fidelity Series Overseas Fund 3.1   Fidelity Series International Value Fund 3.1   Fidelity Series International Growth Fund 3.1     72.9          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2015 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2015 Fund        
Class Name Fidelity Advisor Freedom® 2015 Fund Class A        
Trading Symbol FFVAX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2015 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 79 
0.75%
  
       
Expenses Paid, Amount $ 79        
Expense Ratio, Percent 0.75%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,389 $11,264 $11,632 $11,310 $14,302 $14,290 $13,412 $14,618 $15,359 $16,950 Fidelity Freedom 2015 Composite Index℠ $10,000 $10,888 $11,772 $12,339 $12,321 $15,060 $15,235 $14,373 $15,688 $16,583 $18,173 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   4.01% 2.24% 5.42% Class A (without 5.75% sales charge) 10.36% 3.46% 6.04% Fidelity Freedom 2015 Composite Index℠ 9.59% 3.83% 6.16% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770 $ 407,173,770
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 1,944,056        
Investment Company Portfolio Turnover 18.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$407,173,770
  
Number of Holdings
45
  
Total Advisory Fee
$1,944,056
  
Portfolio Turnover
18%
  
       
Holdings [Text Block]         Bond Funds 54.3 Domestic Equity Funds 22.1 International Equity Funds 18.6 Short-Term Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 54.3                          Domestic Equity Funds - 22.1               International Equity Funds - 18.6          Short-Term Funds - 4.6                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 30.2   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 11.7   Fidelity Series Emerging Markets Opportunities Fund 4.9   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Large Cap Stock Fund 4.3   Fidelity Series 5+ Year Inflation-Protected Bond Index Fund 3.9   Fidelity Series Government Money Market Fund 3.9   Fidelity Series Overseas Fund 3.1   Fidelity Series International Value Fund 3.1   Fidelity Series International Growth Fund 3.1     72.9          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2010 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2010 Fund        
Class Name Fidelity Advisor Freedom® 2010 Fund Class K6        
Trading Symbol FUGLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2010 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 25 
0.24%
  
       
Expenses Paid, Amount $ 25        
Expense Ratio, Percent 0.24%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 6, 2017 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,462 $10,846 $10,737 $13,064 $13,051 $12,399 $13,350 $14,098 $15,405 Fidelity Freedom 2010 Composite Index℠ $10,000 $10,433 $10,920 $11,074 $12,997 $13,070 $12,436 $13,380 $14,134 $15,276 Bloomberg U.S. Aggregate Bond Index $10,000 $9,938 $10,384 $11,311 $11,392 $10,919 $10,396 $10,573 $11,089 $11,571   2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class K6 9.27% 3.35% 5.02% Fidelity Freedom 2010 Composite Index℠ 8.08% 3.28% 4.92% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.67% A   From June 6, 2017   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date         Jun. 06, 2017
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 www.401k.com for more recent performance information.        
Net Assets $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 875,528        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$199,614,999
  
Number of Holdings
45
  
Total Advisory Fee
$875,528
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Bond Funds 59.3 Domestic Equity Funds 18.0 International Equity Funds 15.8 Short-Term Funds 6.5 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 59.3                          Domestic Equity Funds - 18.0               International Equity Funds - 15.8          Short-Term Funds - 6.5                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 32.1   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 17.7   Fidelity Series Government Money Market Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.2   Fidelity Series Large Cap Stock Fund 3.4   Fidelity Series Overseas Fund 2.6   Fidelity Series International Value Fund 2.6   Fidelity Series International Growth Fund 2.6   Fidelity Advisor Series Equity Growth Fund 2.5     77.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2010 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2010 Fund        
Class Name Fidelity Advisor Freedom® 2010 Fund Class Z        
Trading Symbol FIJJX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2010 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 43 
0.41%
  
       
Expenses Paid, Amount $ 43        
Expense Ratio, Percent 0.41%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE October 2, 2018 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,165 $10,058 $12,241 $12,217 $11,598 $12,471 $13,142 $14,341 Fidelity Freedom 2010 Composite Index℠ $10,000 $10,183 $10,326 $12,120 $12,188 $11,597 $12,477 $13,180 $14,245 Bloomberg U.S. Aggregate Bond Index $10,000 $10,460 $11,395 $11,476 $10,999 $10,473 $10,651 $11,171 $11,657   2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year Life of Fund A Class Z 9.13% 3.22% 4.93% Fidelity Freedom 2010 Composite Index℠ 8.08% 3.28% 4.83% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 2.07% A   From October 2, 2018   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date       Oct. 02, 2018  
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 875,528        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$199,614,999
  
Number of Holdings
45
  
Total Advisory Fee
$875,528
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Bond Funds 59.3 Domestic Equity Funds 18.0 International Equity Funds 15.8 Short-Term Funds 6.5 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 59.3                          Domestic Equity Funds - 18.0               International Equity Funds - 15.8          Short-Term Funds - 6.5                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 32.1   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 17.7   Fidelity Series Government Money Market Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.2   Fidelity Series Large Cap Stock Fund 3.4   Fidelity Series Overseas Fund 2.6   Fidelity Series International Value Fund 2.6   Fidelity Series International Growth Fund 2.6   Fidelity Advisor Series Equity Growth Fund 2.5     77.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2010 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2010 Fund        
Class Name Fidelity Advisor Freedom® 2010 Fund Class M        
Trading Symbol FCFTX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2010 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 100 
0.96%
  
       
Expenses Paid, Amount $ 100        
Expense Ratio, Percent 0.96%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $10,483 $11,205 $11,547 $11,359 $13,733 $13,646 $12,883 $13,759 $14,434 $15,660 Fidelity Freedom 2010 Composite Index℠ $10,000 $10,743 $11,484 $12,019 $12,188 $14,305 $14,386 $13,688 $14,727 $15,557 $16,814 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class M (incl. 3.50% sales charge)   4.70% 1.93% 4.59% Class M (without 3.50% sales charge) 8.50% 2.66% 4.96% Fidelity Freedom 2010 Composite Index℠ 8.08% 3.28% 5.33% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 875,528        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$199,614,999
  
Number of Holdings
45
  
Total Advisory Fee
$875,528
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Bond Funds 59.3 Domestic Equity Funds 18.0 International Equity Funds 15.8 Short-Term Funds 6.5 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 59.3                          Domestic Equity Funds - 18.0               International Equity Funds - 15.8          Short-Term Funds - 6.5                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 32.1   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 17.7   Fidelity Series Government Money Market Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.2   Fidelity Series Large Cap Stock Fund 3.4   Fidelity Series Overseas Fund 2.6   Fidelity Series International Value Fund 2.6   Fidelity Series International Growth Fund 2.6   Fidelity Advisor Series Equity Growth Fund 2.5     77.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2010 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2010 Fund        
Class Name Fidelity Advisor Freedom® 2010 Fund Class I        
Trading Symbol FCIFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2010 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 48 
0.46%
  
       
Expenses Paid, Amount $ 48        
Expense Ratio, Percent 0.46%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $10,922 $11,729 $12,140 $12,013 $14,596 $14,565 $13,818 $14,850 $15,642 $17,068 Fidelity Freedom 2010 Composite Index℠ $10,000 $10,743 $11,484 $12,019 $12,188 $14,305 $14,386 $13,688 $14,727 $15,557 $16,814 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class I 9.11% 3.18% 5.49% Fidelity Freedom 2010 Composite Index℠ 8.08% 3.28% 5.33% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 875,528        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$199,614,999
  
Number of Holdings
45
  
Total Advisory Fee
$875,528
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Bond Funds 59.3 Domestic Equity Funds 18.0 International Equity Funds 15.8 Short-Term Funds 6.5 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 59.3                          Domestic Equity Funds - 18.0               International Equity Funds - 15.8          Short-Term Funds - 6.5                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 32.1   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 17.7   Fidelity Series Government Money Market Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.2   Fidelity Series Large Cap Stock Fund 3.4   Fidelity Series Overseas Fund 2.6   Fidelity Series International Value Fund 2.6   Fidelity Series International Growth Fund 2.6   Fidelity Advisor Series Equity Growth Fund 2.5     77.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2010 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2010 Fund        
Class Name Fidelity Advisor Freedom® 2010 Fund Class C        
Trading Symbol FCFCX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2010 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 152 
1.46%
  
       
Expenses Paid, Amount $ 152        
Expense Ratio, Percent 1.46%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $10,807 $11,496 $11,778 $11,539 $13,889 $13,724 $12,889 $13,699 $14,398 $15,669 Fidelity Freedom 2010 Composite Index℠ $10,000 $10,743 $11,484 $12,019 $12,188 $14,305 $14,386 $13,688 $14,727 $15,557 $16,814 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class C  (incl. contingent deferred sales charge) 6.94% 2.13% 4.59% Class C 7.94% 2.13% 4.59% Fidelity Freedom 2010 Composite Index℠ 8.08% 3.28% 5.33% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 875,528        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$199,614,999
  
Number of Holdings
45
  
Total Advisory Fee
$875,528
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Bond Funds 59.3 Domestic Equity Funds 18.0 International Equity Funds 15.8 Short-Term Funds 6.5 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 59.3                          Domestic Equity Funds - 18.0               International Equity Funds - 15.8          Short-Term Funds - 6.5                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 32.1   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 17.7   Fidelity Series Government Money Market Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.2   Fidelity Series Large Cap Stock Fund 3.4   Fidelity Series Overseas Fund 2.6   Fidelity Series International Value Fund 2.6   Fidelity Series International Growth Fund 2.6   Fidelity Advisor Series Equity Growth Fund 2.5     77.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2010 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2010 Fund        
Class Name Fidelity Advisor Freedom® 2010 Fund Class A        
Trading Symbol FACFX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2010 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 74 
0.71%
  
       
Expenses Paid, Amount $ 74        
Expense Ratio, Percent 0.71%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the past 10 years?    CUMULATIVE PERFORMANCE March 31, 2016 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $10,261 $10,997 $11,358 $11,200 $13,583 $13,527 $12,795 $13,709 $14,408 $15,680 Fidelity Freedom 2010 Composite Index℠ $10,000 $10,743 $11,484 $12,019 $12,188 $14,305 $14,386 $13,688 $14,727 $15,557 $16,814 Bloomberg U.S. Aggregate Bond Index $10,000 $10,044 $10,165 $10,620 $11,569 $11,651 $11,168 $10,633 $10,814 $11,342 $11,835   2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year 5 Year 10 Year Class A (incl. 5.75% sales charge)   2.57% 1.70% 4.60% Class A (without 5.75% sales charge) 8.82% 2.91% 5.22% Fidelity Freedom 2010 Composite Index℠ 8.08% 3.28% 5.33% Bloomberg U.S. Aggregate Bond Index 4.35% 0.31% 1.70%     Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999 $ 199,614,999
Holdings Count | shares 45 45 45 45 45
Advisory Fees Paid, Amount $ 875,528        
Investment Company Portfolio Turnover 20.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$199,614,999
  
Number of Holdings
45
  
Total Advisory Fee
$875,528
  
Portfolio Turnover
20%
  
       
Holdings [Text Block]         Bond Funds 59.3 Domestic Equity Funds 18.0 International Equity Funds 15.8 Short-Term Funds 6.5 Short-Term Investments and Net Other Assets (Liabilities) 0.4 ASSET ALLOCATION (% of Fund's net assets)     Bond Funds - 59.3                          Domestic Equity Funds - 18.0               International Equity Funds - 15.8          Short-Term Funds - 6.5                     Short-Term Investments and Net Other Assets (Liabilities) - 0.4          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Investment Grade Bond Fund 32.1   Fidelity Series 0-5 Year Inflation-Protected Bond Index Fund 17.7   Fidelity Series Government Money Market Fund 5.2   Fidelity Series International Developed Markets Bond Index Fund 4.7   Fidelity Series Emerging Markets Opportunities Fund 4.2   Fidelity Series Large Cap Stock Fund 3.4   Fidelity Series Overseas Fund 2.6   Fidelity Series International Value Fund 2.6   Fidelity Series International Growth Fund 2.6   Fidelity Advisor Series Equity Growth Fund 2.5     77.6          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fund's contractual management fee was reduced during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2070 Fund - Class A          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2070 Fund        
Class Name Fidelity Advisor Freedom® 2070 Fund Class A        
Trading Symbol FRBJX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2070 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class A 
$ 103 
0.94%
  
       
Expenses Paid, Amount $ 103        
Expense Ratio, Percent 0.94%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2024 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class A $9,425 $9,770 $11,768 Fidelity Freedom 2070 Composite Index℠ $10,000 $10,441 $12,428 S&P 500® Index $10,000 $10,380 $12,229   2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Class A (incl. 5.75% sales charge)   13.52% 9.75% Class A (without 5.75% sales charge) 20.44% 13.53% Fidelity Freedom 2070 Composite Index℠ 19.02% 13.22% S&P 500® Index 17.80% 12.18% A   From June 28, 2024   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date   Jun. 28, 2024      
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722
Holdings Count | shares 25 25 25 25 25
Advisory Fees Paid, Amount $ 60,583        
Investment Company Portfolio Turnover 24.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$18,920,722
  
Number of Holdings
25
  
Total Advisory Fee
$60,583
  
Portfolio Turnover
24%
  
       
Holdings [Text Block]         Domestic Equity Funds 53.0 International Equity Funds 42.3 Bond Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 53.0               International Equity Funds - 42.3          Bond Funds - 4.6                           Short-Term Investments and Net Other Assets (Liabilities) - 0.1          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 10.9   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Series Overseas Fund 8.1   Fidelity Series International Value Fund 8.0   Fidelity Advisor Series Equity Growth Fund 8.0   Fidelity Series International Growth Fund 8.0   Fidelity Series Opportunistic Insights Fund 6.8   Fidelity Series Stock Selector Large Cap Value Fund 6.2   Fidelity Series Value Discovery Fund 6.2   Fidelity Advisor Series Growth Opportunities Fund 5.7     78.5          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2070 Fund - Class M          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2070 Fund        
Class Name Fidelity Advisor Freedom® 2070 Fund Class M        
Trading Symbol FRBKX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2070 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class M 
$ 130 
1.18%
  
       
Expenses Paid, Amount $ 130        
Expense Ratio, Percent 1.18%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2024 through March 31, 2026. Initial investment of $10,000 and the current sales charge was paid. Class M $9,650 $9,980 $11,988 Fidelity Freedom 2070 Composite Index℠ $10,000 $10,441 $12,428 S&P 500® Index $10,000 $10,380 $12,229   2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Class M (incl. 3.50% sales charge)   15.91% 10.92% Class M (without 3.50% sales charge) 20.11% 13.20% Fidelity Freedom 2070 Composite Index℠ 19.02% 13.22% S&P 500® Index 17.80% 12.18% A   From June 28, 2024   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date   Jun. 28, 2024      
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722
Holdings Count | shares 25 25 25 25 25
Advisory Fees Paid, Amount $ 60,583        
Investment Company Portfolio Turnover 24.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$18,920,722
  
Number of Holdings
25
  
Total Advisory Fee
$60,583
  
Portfolio Turnover
24%
  
       
Holdings [Text Block]         Domestic Equity Funds 53.0 International Equity Funds 42.3 Bond Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 53.0               International Equity Funds - 42.3          Bond Funds - 4.6                           Short-Term Investments and Net Other Assets (Liabilities) - 0.1          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 10.9   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Series Overseas Fund 8.1   Fidelity Series International Value Fund 8.0   Fidelity Advisor Series Equity Growth Fund 8.0   Fidelity Series International Growth Fund 8.0   Fidelity Series Opportunistic Insights Fund 6.8   Fidelity Series Stock Selector Large Cap Value Fund 6.2   Fidelity Series Value Discovery Fund 6.2   Fidelity Advisor Series Growth Opportunities Fund 5.7     78.5          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2070 Fund - Class C          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2070 Fund        
Class Name Fidelity Advisor Freedom® 2070 Fund Class C        
Trading Symbol FRBLX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2070 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class C 
$ 186 
1.69%
  
       
Expenses Paid, Amount $ 186        
Expense Ratio, Percent 1.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2024 through March 31, 2026. Initial investment of $10,000. Class C $10,000 $10,303 $12,316 Fidelity Freedom 2070 Composite Index℠ $10,000 $10,441 $12,428 S&P 500® Index $10,000 $10,380 $12,229   2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Class C  (incl. contingent deferred sales charge) 18.54% 12.64% Class C 19.54% 12.64% Fidelity Freedom 2070 Composite Index℠ 19.02% 13.22% S&P 500® Index 17.80% 12.18% A   From June 28, 2024   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date   Jun. 28, 2024      
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722
Holdings Count | shares 25 25 25 25 25
Advisory Fees Paid, Amount $ 60,583        
Investment Company Portfolio Turnover 24.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$18,920,722
  
Number of Holdings
25
  
Total Advisory Fee
$60,583
  
Portfolio Turnover
24%
  
       
Holdings [Text Block]         Domestic Equity Funds 53.0 International Equity Funds 42.3 Bond Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 53.0               International Equity Funds - 42.3          Bond Funds - 4.6                           Short-Term Investments and Net Other Assets (Liabilities) - 0.1          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 10.9   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Series Overseas Fund 8.1   Fidelity Series International Value Fund 8.0   Fidelity Advisor Series Equity Growth Fund 8.0   Fidelity Series International Growth Fund 8.0   Fidelity Series Opportunistic Insights Fund 6.8   Fidelity Series Stock Selector Large Cap Value Fund 6.2   Fidelity Series Value Discovery Fund 6.2   Fidelity Advisor Series Growth Opportunities Fund 5.7     78.5          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2070 Fund - Class I          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2070 Fund        
Class Name Fidelity Advisor Freedom® 2070 Fund Class I        
Trading Symbol FRBNX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2070 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class I 
$ 76 
0.69%
  
       
Expenses Paid, Amount $ 76        
Expense Ratio, Percent 0.69%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2024 through March 31, 2026. Initial investment of $10,000. Class I $10,000 $10,382 $12,539 Fidelity Freedom 2070 Composite Index℠ $10,000 $10,441 $12,428 S&P 500® Index $10,000 $10,380 $12,229   2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Class I 20.77% 13.80% Fidelity Freedom 2070 Composite Index℠ 19.02% 13.22% S&P 500® Index 17.80% 12.18% A   From June 28, 2024   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date   Jun. 28, 2024      
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722
Holdings Count | shares 25 25 25 25 25
Advisory Fees Paid, Amount $ 60,583        
Investment Company Portfolio Turnover 24.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$18,920,722
  
Number of Holdings
25
  
Total Advisory Fee
$60,583
  
Portfolio Turnover
24%
  
       
Holdings [Text Block]         Domestic Equity Funds 53.0 International Equity Funds 42.3 Bond Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 53.0               International Equity Funds - 42.3          Bond Funds - 4.6                           Short-Term Investments and Net Other Assets (Liabilities) - 0.1          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 10.9   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Series Overseas Fund 8.1   Fidelity Series International Value Fund 8.0   Fidelity Advisor Series Equity Growth Fund 8.0   Fidelity Series International Growth Fund 8.0   Fidelity Series Opportunistic Insights Fund 6.8   Fidelity Series Stock Selector Large Cap Value Fund 6.2   Fidelity Series Value Discovery Fund 6.2   Fidelity Advisor Series Growth Opportunities Fund 5.7     78.5          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
The fund modified its principal investment strategies during the reporting period.

       
Material Fund Change Expenses [Text Block] The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes:
  • Management fee
 
The fund's contractual management fee was reduced during the reporting period.
        
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.

       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2070 Fund - Class Z          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2070 Fund        
Class Name Fidelity Advisor Freedom® 2070 Fund Class Z        
Trading Symbol FRBOX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2070 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-877-208-0098        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class Z 
$ 71 
0.65%
  
       
Expenses Paid, Amount $ 71        
Expense Ratio, Percent 0.65%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2024 through March 31, 2026. Initial investment of $10,000. Class Z $10,000 $10,390 $12,557 Fidelity Freedom 2070 Composite Index℠ $10,000 $10,441 $12,428 S&P 500® Index $10,000 $10,380 $12,229   2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Class Z 20.86% 13.89% Fidelity Freedom 2070 Composite Index℠ 19.02% 13.22% S&P 500® Index 17.80% 12.18% A   From June 28, 2024   Visit institutional.fidelity.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date   Jun. 28, 2024      
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 institutional.fidelity.com for more recent performance information.        
Net Assets $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722
Holdings Count | shares 25 25 25 25 25
Advisory Fees Paid, Amount $ 60,583        
Investment Company Portfolio Turnover 24.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$18,920,722
  
Number of Holdings
25
  
Total Advisory Fee
$60,583
  
Portfolio Turnover
24%
  
       
Holdings [Text Block]         Domestic Equity Funds 53.0 International Equity Funds 42.3 Bond Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 53.0               International Equity Funds - 42.3          Bond Funds - 4.6                           Short-Term Investments and Net Other Assets (Liabilities) - 0.1          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 10.9   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Series Overseas Fund 8.1   Fidelity Series International Value Fund 8.0   Fidelity Advisor Series Equity Growth Fund 8.0   Fidelity Series International Growth Fund 8.0   Fidelity Series Opportunistic Insights Fund 6.8   Fidelity Series Stock Selector Large Cap Value Fund 6.2   Fidelity Series Value Discovery Fund 6.2   Fidelity Advisor Series Growth Opportunities Fund 5.7     78.5          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-877-208-0098  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-877-208-0098</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>        
Fidelity Advisor Freedom 2070 Fund - Class K6          
Shareholder Report [Line Items]          
Fund Name Fidelity Advisor Freedom® 2070 Fund        
Class Name Fidelity Advisor Freedom® 2070 Fund Class K6        
Trading Symbol FRBPX        
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains information about Fidelity Advisor Freedom® 2070 Fund for the period April 1, 2025 to March 31, 2026.        
Shareholder Report Annual or Semi-Annual annual shareholder report        
Additional Information [Text Block] You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com.        
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.        
Additional Information Phone Number 1-800-835-5092        
Additional Information Email fidfunddocuments@fidelity.com        
Additional Information Website fundresearch.fidelity.com/prospectus/sec        
Expenses [Text Block] What were your Fund costs for the last year?
(based on hypothetical $10,000 investment)
 
FUND COST (PREVIOUS YEAR)
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
 
Class K6 
$ 50 
0.45%
  
       
Expenses Paid, Amount $ 50        
Expense Ratio, Percent 0.45%        
Factors Affecting Performance [Text Block] What affected the Fund's performance this period?
 
•Global risk assets posted strong gains for the 12 months ending March 31, 2026, supported by healthy corporate fundamentals in several regions, a resilient global economy, robust corporate spending on artificial intelligence and dovish monetary policy from some central banks, though momentum faded in late February, as conflict in the Middle East took center stage.
•Against this backdrop, an overweight positioning in non-U.S. equities and investment performance among the underlying U.S. equity portfolios notably contributed to the fund's performance versus the composite index for the fiscal year. Also helping on a relative basis was an out-of-composite allocation to commodities and lighter-than-composite exposure to U.S. investment-grade bonds.  
•Within U.S. equities, an investment in Fidelity® Series Large Cap Fund (+29.19%) meaningfully boosted the Fund's relative result, given it outperformed its benchmark, the S&P 500® index (+17.80%), for the 12 months. Fidelity Advisor® Series Growth Opportunities Fund (+25.77%) also stood out, outperforming its benchmark, the Russell 3000® Growth Index (+18.75%).  
•Investment performance within emerging-markets equities also added relative value. Specifically, an investment in Fidelity® Series Emerging Markets Opportunities Fund (+39.58%) outpaced the MSCI Emerging Markets Index (+29.53%).
•In contrast, the performance of the underlying non-U.S. developed-markets equities funds detracted from the Fund's relative result. Fidelity® Series Overseas Fund (+10.87%) lagged its benchmark, the MSCI EAFE Index (+21.61%).
•An underweight allocation to U.S. equities also hurt the Fund's relative performance, along with an overweight in long-term U.S. Treasury bonds. 
        
Performance Past Does Not Indicate Future [Text] <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span>        
Line Graph [Table Text Block] How did the Fund perform over the life of Fund?    CUMULATIVE PERFORMANCE June 28, 2024 through March 31, 2026. Initial investment of $10,000. Class K6 $10,000 $10,407 $12,599 Fidelity Freedom 2070 Composite Index℠ $10,000 $10,441 $12,428 S&P 500® Index $10,000 $10,380 $12,229   2024 2025 2026          
Average Annual Return [Table Text Block] AVERAGE ANNUAL TOTAL RETURNS:   1 Year Life of Fund A Class K6 21.07% 14.11% Fidelity Freedom 2070 Composite Index℠ 19.02% 13.22% S&P 500® Index 17.80% 12.18% A   From June 28, 2024   Visit www.401k.com for more recent performance information.    The Fund's past performance is not a good predictor of the Fund's future performance.  The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.        
Performance Inception Date   Jun. 28, 2024      
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 www.401k.com for more recent performance information.        
Net Assets $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722 $ 18,920,722
Holdings Count | shares 25 25 25 25 25
Advisory Fees Paid, Amount $ 60,583        
Investment Company Portfolio Turnover 24.00%        
Additional Fund Statistics [Text Block] Key Fund Statistics
(as of March 31, 2026)
 
KEY FACTS
 
  
  
Fund Size
$18,920,722
  
Number of Holdings
25
  
Total Advisory Fee
$60,583
  
Portfolio Turnover
24%
  
       
Holdings [Text Block]         Domestic Equity Funds 53.0 International Equity Funds 42.3 Bond Funds 4.6 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets)     Domestic Equity Funds - 53.0               International Equity Funds - 42.3          Bond Funds - 4.6                           Short-Term Investments and Net Other Assets (Liabilities) - 0.1          
Largest Holdings [Text Block] TOP HOLDINGS(% of Fund's net assets)     Fidelity Series Large Cap Stock Fund 10.9   Fidelity Series Emerging Markets Opportunities Fund 10.6   Fidelity Series Overseas Fund 8.1   Fidelity Series International Value Fund 8.0   Fidelity Advisor Series Equity Growth Fund 8.0   Fidelity Series International Growth Fund 8.0   Fidelity Series Opportunistic Insights Fund 6.8   Fidelity Series Stock Selector Large Cap Value Fund 6.2   Fidelity Series Value Discovery Fund 6.2   Fidelity Advisor Series Growth Opportunities Fund 5.7     78.5          
Material Fund Change [Text Block]
How has the Fund changed?
 
This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.
 
The fund modified its principal investment strategies during the reporting period.
       
Material Fund Change Strategies [Text Block] The fund modified its principal investment strategies during the reporting period.
       
Summary of Change Legend [Text Block] This is a summary of certain changes to the Fund since April 1, 2025. For more complete information, you may review the Fund's next prospectus, which we expect to be available by May 30, 2026 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092  or by sending an e-mail to fidfunddocuments@fidelity.com.        
Updated Prospectus Phone Number <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span>        
Updated Prospectus Email Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span>        
Updated Prospectus Web Address <span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span>