XML 211 R3.htm IDEA: XBRL DOCUMENT v3.25.1
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 72 Months Ended 84 Months Ended 108 Months Ended 132 Months Ended
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2025
C000212317_LG_ClassMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2065 Fund</span>    
C000212317_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value $ 10,000          
C000212317_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 8,690          
C000212317_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,613          
C000212317_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,138          
C000212317_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,202          
C000212317_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,038          
C000212317_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,991          
C000212317_LG_1_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2065 Composite Index℠</span>    
C000212317_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000212317_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 8,783          
C000212317_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,174          
C000212317_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,882          
C000212317_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,862          
C000212317_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,453          
C000212317_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,465          
C000212317_LG_2_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>    
C000212317_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000212317_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 8,918          
C000212317_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,944          
C000212317_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,126          
C000212317_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,879          
C000212317_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 19,326          
C000212317_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 20,920          
C000144493_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000144493_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000144493_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,706          
C000144493_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,143          
C000144493_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,610          
C000144493_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,182          
C000144493_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,002          
C000144493_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,990          
C000144493_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,866          
C000144493_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,521          
C000144493_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 20,999          
C000144493_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,385          
C000144493_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2060 Composite Index℠</span>
C000144493_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000144493_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,728          
C000144493_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,177          
C000144493_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,651          
C000144493_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,260          
C000144493_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,095          
C000144493_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,143          
C000144493_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,118          
C000144493_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,714          
C000144493_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,282          
C000144493_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,675          
C000144493_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000144493_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000144493_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000144493_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000144493_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000144493_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000144493_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000144493_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000144493_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000144493_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000144493_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000144493_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000220385_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220385_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220385_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,296,634,004          
C000220385_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,330,272,136          
C000220385_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,182,539,986          
C000220385_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,411,988,961          
C000220385_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,553,446,120          
C000220385_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2020 Composite Index℠</span>      
C000220385_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220385_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,296,214,892          
C000220385_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,336,092,217          
C000220385_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,184,563,190          
C000220385_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,418,510,242          
C000220385_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,557,828,211          
C000220385_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>      
C000220385_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220385_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 1,961,896,920          
C000220385_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 1,880,437,250          
C000220385_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 1,790,490,276          
C000220385_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 1,820,891,361          
C000220385_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 1,909,743,644          
C000252919_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252919_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252919_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,059,768,521          
C000252919_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2030 Composite Index℠</span>        
C000252919_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252919_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,051,246,961          
C000252919_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252919_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252919_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000157965_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157965_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157965_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,785,817          
C000157965_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,414,084          
C000157965_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,030,953          
C000157965_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,321,817          
C000157965_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,043,767          
C000157965_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,183,769          
C000157965_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 8,393,706          
C000157965_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,839,356          
C000157965_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 8,890,744          
C000157965_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 9,423,574          
C000157965_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2030 Composite Index℠</span>
C000157965_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157965_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,788,996          
C000157965_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,417,916          
C000157965_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,037,392          
C000157965_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,338,865          
C000157965_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,066,232          
C000157965_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,224,937          
C000157965_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 8,460,928          
C000157965_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,888,237          
C000157965_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 8,965,643          
C000157965_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 9,495,808          
C000157965_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157965_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157965_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157965_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157965_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157965_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157965_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157965_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157965_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157965_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157965_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157965_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000079278_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079278_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079278_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,708          
C000079278_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,147          
C000079278_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,613          
C000079278_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,185          
C000079278_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,005          
C000079278_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,999          
C000079278_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,879          
C000079278_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,531          
C000079278_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,010          
C000079278_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,397          
C000079278_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2050 Composite Index℠</span>
C000079278_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079278_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,728          
C000079278_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,177          
C000079278_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,651          
C000079278_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,260          
C000079278_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,095          
C000079278_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,143          
C000079278_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,118          
C000079278_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,714          
C000079278_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,282          
C000079278_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,675          
C000079278_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000079278_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079278_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000079278_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000079278_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000079278_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000079278_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000079278_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000079278_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000079278_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000079278_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000079278_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000079277_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079277_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079277_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,712          
C000079277_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,156          
C000079277_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,615          
C000079277_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,193          
C000079277_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,010          
C000079277_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,002          
C000079277_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,881          
C000079277_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,539          
C000079277_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,020          
C000079277_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,402          
C000079277_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2045 Composite Index℠</span>
C000079277_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079277_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,728          
C000079277_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,177          
C000079277_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,651          
C000079277_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,260          
C000079277_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,095          
C000079277_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,143          
C000079277_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,118          
C000079277_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,714          
C000079277_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,282          
C000079277_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,675          
C000079277_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000079277_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079277_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000079277_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000079277_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000079277_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000079277_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000079277_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000079277_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000079277_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000079277_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000079277_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000252918_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252918_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252918_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,059,679,111          
C000252918_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2025 Composite Index℠</span>        
C000252918_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252918_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,051,143,810          
C000252918_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252918_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252918_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000250737_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>        
C000250737_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000250737_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,461          
C000250737_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2070 Composite Index℠</span>        
C000250737_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000250737_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,441          
C000250737_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000250737_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000250737_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,380          
C000252913_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252913_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252913_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,072,642,127          
C000252913_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2050 Composite Index℠</span>        
C000252913_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252913_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,055,971,476          
C000252913_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252913_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252913_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000079283_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079283_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079283_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,866          
C000079283_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,820          
C000079283_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,764          
C000079283_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,304          
C000079283_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,104          
C000079283_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,326          
C000079283_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,550          
C000079283_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,555          
C000079283_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,071          
C000079283_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 17,000          
C000079283_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2020 Composite Index℠</span>
C000079283_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079283_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,877          
C000079283_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,843          
C000079283_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,802          
C000079283_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,370          
C000079283_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,176          
C000079283_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,453          
C000079283_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,721          
C000079283_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,702          
C000079283_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,276          
C000079283_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 17,214          
C000079283_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000079283_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079283_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,196          
C000079283_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,241          
C000079283_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,364          
C000079283_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,829          
C000079283_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,796          
C000079283_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,880          
C000079283_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,386          
C000079283_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,842          
C000079283_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,026          
C000079283_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,564          
C000157967_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157967_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157967_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,746,953          
C000157967_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,454,420          
C000157967_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,174,468          
C000157967_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,459,038          
C000157967_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,884,772          
C000157967_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,820,840          
C000157967_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,255,024          
C000157967_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,593,648          
C000157967_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,224,029          
C000157967_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,895,251          
C000157967_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2040 Composite Index℠</span>
C000157967_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157967_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,751,667          
C000157967_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,459,524          
C000157967_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,179,499          
C000157967_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,477,152          
C000157967_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,908,057          
C000157967_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,862,422          
C000157967_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,336,522          
C000157967_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,647,032          
C000157967_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,309,842          
C000157967_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,975,967          
C000157967_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157967_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157967_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157967_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157967_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157967_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157967_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157967_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157967_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157967_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157967_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157967_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000177883_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2015 Fund</span>  
C000177883_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177883_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,609          
C000177883_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,967          
C000177883_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,757          
C000177883_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,580          
C000177883_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,647          
C000177883_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,892          
C000177883_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,105          
C000177883_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,914          
C000177883_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2015 Composite Index℠</span>  
C000177883_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177883_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,524          
C000177883_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,030          
C000177883_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,014          
C000177883_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,463          
C000177883_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,619          
C000177883_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,849          
C000177883_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,024          
C000177883_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,824          
C000177883_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>  
C000177883_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177883_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 9,960          
C000177883_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,406          
C000177883_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,336          
C000177883_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,416          
C000177883_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,942          
C000177883_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,419          
C000177883_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,596          
C000177883_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,113          
C000220384_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220384_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220384_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,239,599,040          
C000220384_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,260,173,101          
C000220384_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,134,323,470          
C000220384_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,326,250,334          
C000220384_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,461,644,353          
C000220384_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2015 Composite Index℠</span>      
C000220384_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220384_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,240,328,599          
C000220384_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,266,284,020          
C000220384_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,138,123,847          
C000220384_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,333,690,107          
C000220384_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,466,775,311          
C000220384_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>      
C000220384_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220384_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 1,961,896,920          
C000220384_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 1,880,437,250          
C000220384_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 1,790,490,276          
C000220384_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 1,820,891,361          
C000220384_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 1,909,743,644          
C000177888_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2040 Fund</span>  
C000177888_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177888_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,989          
C000177888_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,271          
C000177888_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,114          
C000177888_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,831          
C000177888_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,450          
C000177888_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,370          
C000177888_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,522          
C000177888_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,628          
C000177888_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2040 Composite Index℠</span>  
C000177888_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177888_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,910          
C000177888_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,449          
C000177888_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,443          
C000177888_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,666          
C000177888_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,504          
C000177888_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,285          
C000177888_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,224          
C000177888_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,402          
C000177888_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177888_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177888_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177888_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177888_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177888_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177888_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177888_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177888_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177888_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000157957_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157957_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157957_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,746,061          
C000157957_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,454,932          
C000157957_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,174,724          
C000157957_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,457,394          
C000157957_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,884,207          
C000157957_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,819,916          
C000157957_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,256,753          
C000157957_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,599,109          
C000157957_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,310,036          
C000157957_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,996,524          
C000157957_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2045 Composite Index℠</span>
C000157957_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157957_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,751,667          
C000157957_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,459,524          
C000157957_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,179,499          
C000157957_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,477,152          
C000157957_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,908,057          
C000157957_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,862,422          
C000157957_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,338,439          
C000157957_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,652,539          
C000157957_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,395,314          
C000157957_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,076,086          
C000157957_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157957_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157957_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157957_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157957_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157957_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157957_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157957_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157957_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157957_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157957_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157957_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000220380_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220380_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220380_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,570,598,052          
C000220380_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,697,791,321          
C000220380_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,506,619,120          
C000220380_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,006,497,215          
C000220380_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,207,102,829          
C000220380_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2050 Composite Index℠</span>      
C000220380_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220380_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,564,930,037          
C000220380_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,702,697,201          
C000220380_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,504,186,394          
C000220380_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,008,574,171          
C000220380_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,205,600,618          
C000220380_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220380_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220380_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220380_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220380_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220380_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220380_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000177884_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2020 Fund</span>  
C000177884_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177884_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,672          
C000177884_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177884_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,666          
C000177884_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,008          
C000177884_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,145          
C000177884_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,265          
C000177884_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,743          
C000177884_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,580          
C000177884_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2020 Composite Index℠</span>  
C000177884_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177884_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,586          
C000177884_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,106          
C000177884_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,931          
C000177884_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,873          
C000177884_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,114          
C000177884_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,199          
C000177884_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,612          
C000177884_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,454          
C000177884_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>  
C000177884_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177884_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 9,960          
C000177884_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,406          
C000177884_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,336          
C000177884_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,416          
C000177884_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,942          
C000177884_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,419          
C000177884_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,596          
C000177884_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,113          
C000220379_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220379_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220379_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,570,322,474          
C000220379_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,696,910,965          
C000220379_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,506,886,552          
C000220379_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,005,131,673          
C000220379_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,206,138,060          
C000220379_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2045 Composite Index℠</span>      
C000220379_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220379_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,564,930,037          
C000220379_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,702,697,201          
C000220379_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,504,186,394          
C000220379_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,008,574,171          
C000220379_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,205,600,618          
C000220379_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220379_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220379_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220379_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220379_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220379_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220379_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000252925_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252925_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252925_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,069,015,444          
C000252925_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2070 Composite Index℠</span>        
C000252925_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252925_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,055,971,476          
C000252925_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252925_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252925_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000220383_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220383_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220383_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,181,263,394          
C000220383_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,189,435,914          
C000220383_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,084,500,431          
C000220383_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,239,051,130          
C000220383_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,366,539,244          
C000220383_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2010 Composite Index℠</span>      
C000220383_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220383_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,182,342,947          
C000220383_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,194,669,131          
C000220383_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,088,181,925          
C000220383_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,246,718,486          
C000220383_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,373,369,726          
C000220383_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>      
C000220383_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220383_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 1,961,896,920          
C000220383_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 1,880,437,250          
C000220383_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 1,790,490,276          
C000220383_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 1,820,891,361          
C000220383_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 1,909,743,644          
C000157963_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157963_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157963_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,878,953          
C000157963_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,354,884          
C000157963_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,824,460          
C000157963_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,095,268          
C000157963_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,999,439          
C000157963_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,598,626          
C000157963_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,707,700          
C000157963_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,216,959          
C000157963_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,978,500          
C000157963_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,438,347          
C000157963_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2020 Composite Index℠</span>
C000157963_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157963_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,881,305          
C000157963_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,358,776          
C000157963_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,832,425          
C000157963_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,113,486          
C000157963_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,017,251          
C000157963_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,637,066          
C000157963_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,769,695          
C000157963_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,265,719          
C000157963_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 8,043,812          
C000157963_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,507,175          
C000157963_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000157963_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157963_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 5,192,697          
C000157963_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,215,571          
C000157963_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,278,300          
C000157963_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,514,810          
C000157963_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,007,488          
C000157963_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,050,158          
C000157963_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 5,798,950          
C000157963_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 5,521,569          
C000157963_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,615,321          
C000157963_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,889,326          
C000079279_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079279_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079279_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,010          
C000079279_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,412          
C000079279_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,831          
C000079279_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,273          
C000079279_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,706          
C000079279_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,844          
C000079279_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,780          
C000079279_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,281          
C000079279_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,015          
C000079279_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,732          
C000079279_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index Income Composite Index℠</span>
C000079279_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079279_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,017          
C000079279_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,431          
C000079279_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,867          
C000079279_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,329          
C000079279_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,773          
C000079279_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,951          
C000079279_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,913          
C000079279_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,420          
C000079279_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,183          
C000079279_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,913          
C000079279_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000079279_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079279_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,196          
C000079279_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,241          
C000079279_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,364          
C000079279_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,829          
C000079279_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,796          
C000079279_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,880          
C000079279_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,386          
C000079279_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,842          
C000079279_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,026          
C000079279_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,564          
C000252924_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252924_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252924_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,072,782,556          
C000252924_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2065 Composite Index℠</span>        
C000252924_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252924_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,055,971,476          
C000252924_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252924_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252924_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000220381_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220381_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220381_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,091,843,329          
C000220381_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,083,390,998          
C000220381_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,004,697,552          
C000220381_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,124,065,237          
C000220381_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,242,912,626          
C000220381_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index Income Composite Index℠</span>      
C000220381_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220381_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,095,171,776          
C000220381_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,089,038,150          
C000220381_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,009,321,989          
C000220381_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,132,760,115          
C000220381_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,250,880,790          
C000220381_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>      
C000220381_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220381_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 1,961,896,920          
C000220381_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 1,880,437,250          
C000220381_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 1,790,490,276          
C000220381_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 1,820,891,361          
C000220381_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 1,909,743,644          
C000220387_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220387_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220387_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,395,521,257          
C000220387_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,456,446,567          
C000220387_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,294,660,552          
C000220387_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,603,270,947          
C000220387_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,760,173,624          
C000220387_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2030 Composite Index℠</span>      
C000220387_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220387_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,393,696,189          
C000220387_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,462,376,612          
C000220387_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,295,706,894          
C000220387_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,609,263,392          
C000220387_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,763,556,732          
C000220387_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220387_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220387_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220387_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220387_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220387_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220387_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000252923_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252923_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252923_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,071,383,824          
C000252923_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2060 Composite Index℠</span>        
C000252923_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252923_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,055,971,476          
C000252923_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252923_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252923_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000252921_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252921_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252921_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,072,162,960          
C000252921_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2040 Composite Index℠</span>        
C000252921_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252921_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,056,580,824          
C000252921_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252921_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252921_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000157958_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157958_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157958_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,748,136          
C000157958_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,454,717          
C000157958_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,174,776          
C000157958_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,458,022          
C000157958_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,882,506          
C000157958_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,821,666          
C000157958_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,256,288          
C000157958_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,598,589          
C000157958_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,311,034          
C000157958_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,996,016          
C000157958_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2050 Composite Index℠</span>
C000157958_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157958_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,751,667          
C000157958_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,459,524          
C000157958_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,179,499          
C000157958_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,477,152          
C000157958_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,908,057          
C000157958_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,862,422          
C000157958_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,338,439          
C000157958_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,652,539          
C000157958_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,395,314          
C000157958_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,076,086          
C000157958_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157958_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157958_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157958_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157958_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157958_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157958_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157958_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157958_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157958_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157958_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157958_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000220388_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220388_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220388_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,501,127,749          
C000220388_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,596,101,749          
C000220388_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,418,349,910          
C000220388_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,808,088,492          
C000220388_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,983,580,328          
C000220388_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2035 Composite Index℠</span>      
C000220388_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220388_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,496,975,851          
C000220388_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,602,077,379          
C000220388_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,417,372,699          
C000220388_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,812,246,489          
C000220388_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,985,413,855          
C000220388_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220388_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220388_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220388_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220388_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220388_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220388_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000252915_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252915_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252915_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,081,393,900          
C000252915_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2010 Composite Index℠</span>        
C000252915_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252915_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,079,680,557          
C000252915_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>        
C000252915_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252915_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,042,673,521          
C000101225_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000101225_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000101225_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,704          
C000101225_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,150          
C000101225_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,610          
C000101225_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,185          
C000101225_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,006          
C000101225_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,995          
C000101225_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,873          
C000101225_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,531          
C000101225_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,007          
C000101225_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,399          
C000101225_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2055 Composite Index℠</span>
C000101225_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000101225_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,728          
C000101225_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,177          
C000101225_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,651          
C000101225_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,260          
C000101225_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,095          
C000101225_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,143          
C000101225_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,118          
C000101225_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,714          
C000101225_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,282          
C000101225_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,675          
C000101225_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000101225_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000101225_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000101225_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000101225_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000101225_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000101225_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000101225_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000101225_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000101225_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000101225_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000101225_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000177880_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2060 Fund</span>  
C000177880_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177880_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,989          
C000177880_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,269          
C000177880_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,115          
C000177880_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,838          
C000177880_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,447          
C000177880_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,373          
C000177880_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,675          
C000177880_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,774          
C000177880_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2060 Composite Index℠</span>  
C000177880_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177880_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,910          
C000177880_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,449          
C000177880_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,443          
C000177880_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,666          
C000177880_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,507          
C000177880_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,295          
C000177880_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,375          
C000177880_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,579          
C000177880_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177880_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177880_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177880_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177880_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177880_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177880_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177880_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177880_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177880_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000079287_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079287_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079287_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,709          
C000079287_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,155          
C000079287_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,615          
C000079287_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,190          
C000079287_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,012          
C000079287_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,001          
C000079287_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,883          
C000079287_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,528          
C000079287_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 20,842          
C000079287_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,202          
C000079287_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2040 Composite Index℠</span>
C000079287_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079287_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,728          
C000079287_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,177          
C000079287_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,651          
C000079287_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,260          
C000079287_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,095          
C000079287_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 18,143          
C000079287_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 19,114          
C000079287_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,702          
C000079287_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 21,107          
C000079287_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 22,470          
C000079287_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000079287_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079287_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000079287_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000079287_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000079287_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000079287_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000079287_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000079287_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000079287_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000079287_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000079287_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000220392_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220392_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220392_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,569,456,607          
C000220392_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,696,985,204          
C000220392_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,506,542,000          
C000220392_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,004,021,796          
C000220392_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,204,848,996          
C000220392_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2065 Composite Index℠</span>      
C000220392_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220392_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,564,930,037          
C000220392_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,702,697,201          
C000220392_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,504,186,394          
C000220392_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,008,574,171          
C000220392_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,205,600,618          
C000220392_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220392_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220392_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220392_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220392_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220392_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220392_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000157969_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157969_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157969_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,747,680          
C000157969_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,456,670          
C000157969_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,172,467          
C000157969_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,459,830          
C000157969_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,882,856          
C000157969_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,819,541          
C000157969_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,257,323          
C000157969_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,601,533          
C000157969_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,307,278          
C000157969_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,998,009          
C000157969_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2060 Composite Index℠</span>
C000157969_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157969_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,751,667          
C000157969_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,459,524          
C000157969_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,179,499          
C000157969_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,477,152          
C000157969_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,908,057          
C000157969_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,862,422          
C000157969_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,338,439          
C000157969_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,652,539          
C000157969_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,395,314          
C000157969_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,076,086          
C000157969_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157969_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157969_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157969_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157969_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157969_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157969_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157969_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157969_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157969_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157969_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157969_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000212331_LG_ClassMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>    
C000212331_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000212331_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 8,776          
C000212331_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,153          
C000212331_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,794          
C000212331_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,812          
C000212331_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,358          
C000212331_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,363          
C000212331_LG_1_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2065 Composite Index℠</span>    
C000212331_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000212331_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 8,783          
C000212331_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,174          
C000212331_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,882          
C000212331_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,862          
C000212331_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,453          
C000212331_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,465          
C000212331_LG_2_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>    
C000212331_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000212331_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 8,918          
C000212331_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,944          
C000212331_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,126          
C000212331_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,879          
C000212331_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 19,326          
C000212331_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 20,920          
C000250739_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>        
C000250739_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000250739_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,092,688,803          
C000250739_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2070 Composite Index℠</span>        
C000250739_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000250739_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,088,293,194          
C000250739_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000250739_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000250739_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,076,098,185          
C000079281_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079281_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079281_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,928          
C000079281_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,647          
C000079281_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,352          
C000079281_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,855          
C000079281_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,014          
C000079281_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,062          
C000079281_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,108          
C000079281_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,421          
C000079281_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,417          
C000079281_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,226          
C000079281_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2010 Composite Index℠</span>
C000079281_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079281_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,935          
C000079281_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,668          
C000079281_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,389          
C000079281_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,911          
C000079281_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,079          
C000079281_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,177          
C000079281_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,257          
C000079281_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,565          
C000079281_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,595          
C000079281_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,418          
C000079281_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000079281_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079281_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,196          
C000079281_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,241          
C000079281_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,364          
C000079281_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,829          
C000079281_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,796          
C000079281_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,880          
C000079281_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,386          
C000079281_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,842          
C000079281_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,026          
C000079281_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,564          
C000079282_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079282_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079282_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,890          
C000079282_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,751          
C000079282_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,592          
C000079282_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,120          
C000079282_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,099          
C000079282_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,751          
C000079282_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,879          
C000079282_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,042          
C000079282_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,293          
C000079282_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,171          
C000079282_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2015 Composite Index℠</span>
C000079282_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079282_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,902          
C000079282_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,775          
C000079282_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,635          
C000079282_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,185          
C000079282_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,167          
C000079282_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,873          
C000079282_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,045          
C000079282_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,194          
C000079282_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,492          
C000079282_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,376          
C000079282_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000079282_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079282_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,196          
C000079282_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,241          
C000079282_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,364          
C000079282_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,829          
C000079282_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,796          
C000079282_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,880          
C000079282_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,386          
C000079282_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,842          
C000079282_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,026          
C000079282_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,564          
C000252917_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252917_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252917_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,066,628,375          
C000252917_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2020 Composite Index℠</span>        
C000252917_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252917_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,059,830,965          
C000252917_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>        
C000252917_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252917_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,042,673,521          
C000220391_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220391_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220391_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,570,441,371          
C000220391_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,696,617,493          
C000220391_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,506,116,704          
C000220391_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,005,402,730          
C000220391_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,205,830,164          
C000220391_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2060 Composite Index℠</span>      
C000220391_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220391_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,564,930,037          
C000220391_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,702,697,201          
C000220391_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,504,186,394          
C000220391_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,008,574,171          
C000220391_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,205,600,618          
C000220391_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220391_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220391_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220391_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220391_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220391_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220391_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000157962_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157962_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157962_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,898,470          
C000157962_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,329,024          
C000157962_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,752,371          
C000157962_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,014,227          
C000157962_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,005,488          
C000157962_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,325,643          
C000157962_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,395,610          
C000157962_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,982,694          
C000157962_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,608,525          
C000157962_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,042,829          
C000157962_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2015 Composite Index℠</span>
C000157962_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157962_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,902,973          
C000157962_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,335,626          
C000157962_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,761,201          
C000157962_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,033,550          
C000157962_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,024,838          
C000157962_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,364,344          
C000157962_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,449,664          
C000157962_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,028,380          
C000157962_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,671,239          
C000157962_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,108,713          
C000157962_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000157962_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157962_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 5,192,697          
C000157962_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,215,571          
C000157962_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,278,300          
C000157962_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,514,810          
C000157962_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,007,488          
C000157962_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,050,158          
C000157962_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 5,798,950          
C000157962_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 5,521,569          
C000157962_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,615,321          
C000157962_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,889,326          
C000177886_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2030 Fund</span>  
C000177886_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177886_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,863          
C000177886_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,199          
C000177886_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,541          
C000177886_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,853          
C000177886_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,131          
C000177886_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,173          
C000177886_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,226          
C000177886_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 17,151          
C000177886_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2030 Composite Index℠</span>  
C000177886_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177886_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,773          
C000177886_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,323          
C000177886_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,836          
C000177886_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,692          
C000177886_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,114          
C000177886_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,091          
C000177886_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,015          
C000177886_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,962          
C000177886_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177886_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177886_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177886_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177886_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177886_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177886_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177886_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177886_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177886_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000079286_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079286_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079286_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,707          
C000079286_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,145          
C000079286_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,589          
C000079286_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,173          
C000079286_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,200          
C000079286_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,602          
C000079286_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,263          
C000079286_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 16,994          
C000079286_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 19,730          
C000079286_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 20,949          
C000079286_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2035 Composite Index℠</span>
C000079286_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079286_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,728          
C000079286_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,173          
C000079286_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,627          
C000079286_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 13,244          
C000079286_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,287          
C000079286_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,744          
C000079286_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 18,491          
C000079286_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 17,178          
C000079286_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 19,984          
C000079286_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 21,215          
C000079286_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000079286_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079286_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000079286_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000079286_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000079286_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000079286_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000079286_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000079286_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000079286_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000079286_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000079286_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000252912_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252912_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252912_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,071,202,557          
C000252912_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2045 Composite Index℠</span>        
C000252912_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252912_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,055,971,476          
C000252912_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252912_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252912_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000177889_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2045 Fund</span>  
C000177889_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177889_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,991          
C000177889_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,271          
C000177889_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,115          
C000177889_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,838          
C000177889_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,453          
C000177889_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,362          
C000177889_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,674          
C000177889_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,769          
C000177889_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2045 Composite Index℠</span>  
C000177889_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177889_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,910          
C000177889_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,449          
C000177889_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,443          
C000177889_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,666          
C000177889_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,507          
C000177889_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,295          
C000177889_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,375          
C000177889_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,579          
C000177889_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177889_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177889_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177889_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177889_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177889_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177889_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177889_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177889_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177889_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000252916_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252916_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252916_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,072,521,024          
C000252916_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2015 Composite Index℠</span>        
C000252916_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252916_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,069,883,518          
C000252916_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>        
C000252916_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252916_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,042,673,521          
C000252922_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252922_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252922_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,072,072,046          
C000252922_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2055 Composite Index℠</span>        
C000252922_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252922_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,055,971,476          
C000252922_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252922_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252922_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000177887_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2035 Fund</span>  
C000177887_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177887_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,977          
C000177887_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,279          
C000177887_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,294          
C000177887_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,509          
C000177887_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,966          
C000177887_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,923          
C000177887_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,507          
C000177887_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 18,531          
C000177887_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2035 Composite Index℠</span>  
C000177887_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177887_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,896          
C000177887_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,442          
C000177887_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,615          
C000177887_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,329          
C000177887_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 15,974          
C000177887_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,840          
C000177887_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,264          
C000177887_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 18,327          
C000177887_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177887_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177887_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177887_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177887_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177887_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177887_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177887_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177887_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177887_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000157968_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157968_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157968_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,744,385          
C000157968_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,455,203          
C000157968_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,171,694          
C000157968_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,456,431          
C000157968_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,884,840          
C000157968_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,819,588          
C000157968_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,253,601          
C000157968_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,599,637          
C000157968_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,308,926          
C000157968_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,995,847          
C000157968_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2055 Composite Index℠</span>
C000157968_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157968_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,751,667          
C000157968_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,459,524          
C000157968_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,179,499          
C000157968_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,477,152          
C000157968_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,908,057          
C000157968_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,862,422          
C000157968_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,338,439          
C000157968_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,652,539          
C000157968_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,395,314          
C000157968_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,076,086          
C000157968_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157968_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157968_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157968_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157968_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157968_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157968_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157968_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157968_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157968_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157968_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157968_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000252920_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252920_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252920_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,065,570,236          
C000252920_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2035 Composite Index℠</span>        
C000252920_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252920_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,054,037,949          
C000252920_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000252920_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252920_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,077,848,798          
C000177881_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend Income Fund</span>  
C000177881_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177881_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,314          
C000177881_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,689          
C000177881_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,921          
C000177881_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,323          
C000177881_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,247          
C000177881_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,756          
C000177881_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,479          
C000177881_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,190          
C000177881_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Income Composite Index℠</span>  
C000177881_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177881_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,253          
C000177881_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,695          
C000177881_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,114          
C000177881_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,226          
C000177881_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,190          
C000177881_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,725          
C000177881_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,445          
C000177881_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,135          
C000177881_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>  
C000177881_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177881_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 9,960          
C000177881_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,406          
C000177881_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,336          
C000177881_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,416          
C000177881_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,942          
C000177881_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,419          
C000177881_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,596          
C000177881_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,113          
C000250738_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>        
C000250738_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000250738_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,226,653          
C000250738_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2070 Composite Index℠</span>        
C000250738_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000250738_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,220,733          
C000250738_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000250738_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000250738_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,190,245          
C000252914_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier II Class</span>        
C000252914_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252914_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,084,928,646          
C000252914_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index Income Composite Index℠</span>        
C000252914_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252914_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,085,245,416          
C000252914_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>        
C000252914_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,000,000,000          
C000252914_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,042,673,521          
C000250724_LG_ClassMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2070 Fund</span>        
C000250724_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000250724_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,383          
C000250724_LG_1_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2070 Composite Index℠</span>        
C000250724_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000250724_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,441          
C000250724_LG_2_AdditionalIndexMember_2YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>        
C000250724_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000250724_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,380          
C000157961_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157961_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157961_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,930,679          
C000157961_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,295,229          
C000157961_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,644,358          
C000157961_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,897,972          
C000157961_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,978,853          
C000157961_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,005,296          
C000157961_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,029,611          
C000157961_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,690,547          
C000157961_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,189,757          
C000157961_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 7,596,227          
C000157961_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2010 Composite Index℠</span>
C000157961_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157961_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,932,632          
C000157961_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,296,656          
C000157961_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,654,599          
C000157961_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,913,861          
C000157961_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,997,262          
C000157961_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,038,859          
C000157961_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,078,616          
C000157961_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,735,156          
C000157961_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,246,494          
C000157961_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 7,654,991          
C000157961_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000157961_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157961_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 5,192,697          
C000157961_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,215,571          
C000157961_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,278,300          
C000157961_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,514,810          
C000157961_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,007,488          
C000157961_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,050,158          
C000157961_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 5,798,950          
C000157961_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 5,521,569          
C000157961_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,615,321          
C000157961_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,889,326          
C000177882_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2010 Fund</span>  
C000177882_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177882_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,520          
C000177882_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,877          
C000177882_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,841          
C000177882_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,110          
C000177882_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,113          
C000177882_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,490          
C000177882_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,438          
C000177882_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,235          
C000177882_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2010 Composite Index℠</span>  
C000177882_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177882_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,436          
C000177882_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,922          
C000177882_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,076          
C000177882_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,000          
C000177882_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,073          
C000177882_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,439          
C000177882_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,383          
C000177882_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,138          
C000177882_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>  
C000177882_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177882_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 9,960          
C000177882_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,406          
C000177882_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,336          
C000177882_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,416          
C000177882_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,942          
C000177882_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,419          
C000177882_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,596          
C000177882_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,113          
C000079285_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079285_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079285_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,756          
C000079285_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,031          
C000079285_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,283          
C000079285_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,862          
C000079285_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,298          
C000079285_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 16,648          
C000079285_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 17,058          
C000079285_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,924          
C000079285_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,061          
C000079285_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,135          
C000079285_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2030 Composite Index℠</span>
C000079285_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079285_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,773          
C000079285_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,057          
C000079285_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 12,321          
C000079285_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,936          
C000079285_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,380          
C000079285_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 16,785          
C000079285_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 17,267          
C000079285_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 16,098          
C000079285_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,297          
C000079285_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,379          
C000079285_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000079285_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079285_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000079285_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000079285_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000079285_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000079285_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000079285_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000079285_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000079285_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000079285_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000079285_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000177878_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2050 Fund</span>  
C000177878_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177878_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,989          
C000177878_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,269          
C000177878_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,114          
C000177878_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,828          
C000177878_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,443          
C000177878_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,355          
C000177878_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,649          
C000177878_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,743          
C000177878_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2050 Composite Index℠</span>  
C000177878_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177878_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,910          
C000177878_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,449          
C000177878_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,443          
C000177878_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,666          
C000177878_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,507          
C000177878_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,295          
C000177878_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,375          
C000177878_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,579          
C000177878_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177878_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177878_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177878_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177878_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177878_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177878_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177878_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177878_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177878_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000220390_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220390_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220390_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,569,376,202          
C000220390_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,697,690,481          
C000220390_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,506,076,076          
C000220390_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,005,115,168          
C000220390_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,206,346,184          
C000220390_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2055 Composite Index℠</span>      
C000220390_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220390_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,564,930,037          
C000220390_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,702,697,201          
C000220390_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,504,186,394          
C000220390_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,008,574,171          
C000220390_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,205,600,618          
C000220390_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220390_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220390_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220390_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220390_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220390_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220390_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000157959_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157959_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157959_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 5,012,775          
C000157959_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,213,349          
C000157959_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,425,419          
C000157959_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,651,288          
C000157959_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,876,240          
C000157959_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,445,023          
C000157959_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 6,416,978          
C000157959_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,168,267          
C000157959_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 6,540,504          
C000157959_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 6,903,194          
C000157959_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index Income Composite Index℠</span>
C000157959_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157959_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 5,012,266          
C000157959_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,219,190          
C000157959_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,437,563          
C000157959_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,668,531          
C000157959_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,890,571          
C000157959_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,480,034          
C000157959_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 6,461,063          
C000157959_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,214,514          
C000157959_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 6,596,289          
C000157959_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 6,961,617          
C000157959_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Bloomberg U.S. Aggregate Bond Index</span>
C000157959_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157959_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 5,192,697          
C000157959_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,215,571          
C000157959_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,278,300          
C000157959_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,514,810          
C000157959_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,007,488          
C000157959_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,050,158          
C000157959_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 5,798,950          
C000157959_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 5,521,569          
C000157959_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 5,615,321          
C000157959_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 5,889,326          
C000220386_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220386_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220386_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,338,829,920          
C000220386_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,385,070,966          
C000220386_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,227,860,847          
C000220386_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,492,946,417          
C000220386_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,640,472,021          
C000220386_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2025 Composite Index℠</span>      
C000220386_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220386_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,338,901,213          
C000220386_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,391,485,370          
C000220386_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,229,519,994          
C000220386_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,499,688,968          
C000220386_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 2,644,804,055          
C000220386_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220386_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220386_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220386_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220386_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220386_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220386_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000177885_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2025 Fund</span>  
C000177885_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177885_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,724          
C000177885_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,076          
C000177885_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,595          
C000177885_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,349          
C000177885_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,552          
C000177885_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,605          
C000177885_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,344          
C000177885_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,201          
C000177885_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2025 Composite Index℠</span>  
C000177885_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177885_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,643          
C000177885_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,172          
C000177885_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,872          
C000177885_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,200          
C000177885_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,519          
C000177885_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,536          
C000177885_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,176          
C000177885_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,057          
C000177885_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177885_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177885_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177885_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177885_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177885_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177885_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177885_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177885_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177885_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000220389_LG_ClassMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Premier Class</span>      
C000220389_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220389_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,569,839,744          
C000220389_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,696,838,733          
C000220389_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,504,546,715          
C000220389_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,980,616,147          
C000220389_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,177,272,104          
C000220389_LG_1_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2040 Composite Index℠</span>      
C000220389_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220389_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,564,930,037          
C000220389_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 2,702,142,363          
C000220389_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,502,592,539          
C000220389_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 2,983,837,130          
C000220389_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,176,624,452          
C000220389_LG_2_AdditionalIndexMember_6YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>      
C000220389_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 2,000,000,000          
C000220389_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 2,637,300,930          
C000220389_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 3,049,927,469          
C000220389_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 2,814,215,574          
C000220389_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 3,655,135,424          
C000220389_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 3,956,745,967          
C000079284_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Investor Class</span>
C000079284_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079284_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,828          
C000079284_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,877          
C000079284_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,913          
C000079284_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,467          
C000079284_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,124          
C000079284_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,793          
C000079284_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,094          
C000079284_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,024          
C000079284_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,808          
C000079284_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 17,790          
C000079284_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2025 Composite Index℠</span>
C000079284_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079284_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,842          
C000079284_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,901          
C000079284_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,951          
C000079284_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,534          
C000079284_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,197          
C000079284_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,930          
C000079284_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,288          
C000079284_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,185          
C000079284_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,025          
C000079284_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 18,014          
C000079284_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000079284_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000079284_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,178          
C000079284_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,926          
C000079284_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 13,595          
C000079284_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 14,886          
C000079284_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 13,847          
C000079284_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 21,650          
C000079284_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 25,038          
C000079284_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 23,103          
C000079284_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 30,006          
C000079284_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 32,482          
C000177879_LG_ClassMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Flex® Freedom Blend 2055 Fund</span>  
C000177879_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177879_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,990          
C000177879_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,271          
C000177879_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,117          
C000177879_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,846          
C000177879_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,455          
C000177879_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,370          
C000177879_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,669          
C000177879_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,779          
C000177879_LG_1_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom 2055 Composite Index℠</span>  
C000177879_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177879_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,910          
C000177879_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,449          
C000177879_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,443          
C000177879_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,666          
C000177879_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 16,507          
C000177879_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 15,295          
C000177879_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,375          
C000177879_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,579          
C000177879_LG_2_AdditionalIndexMember_9YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>  
C000177879_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000177879_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,022          
C000177879_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,068          
C000177879_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,226          
C000177879_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 17,552          
C000177879_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 20,299          
C000177879_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 18,730          
C000177879_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 24,326          
C000177879_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 26,334          
C000212330_LG_ClassMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>    
C000212330_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000212330_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 4,388,267          
C000212330_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,579,063          
C000212330_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 6,904,618          
C000212330_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,415,946          
C000212330_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,693,687          
C000212330_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,200,517          
C000212330_LG_1_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2065 Composite Index℠</span>    
C000212330_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000212330_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 4,391,280          
C000212330_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,587,170          
C000212330_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 6,940,979          
C000212330_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 6,431,170          
C000212330_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 7,726,522          
C000212330_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,232,519          
C000212330_LG_2_AdditionalIndexMember_7YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>    
C000212330_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000212330_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 4,459,188          
C000212330_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 6,972,014          
C000212330_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 8,062,841          
C000212330_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,439,709          
C000212330_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 9,662,779          
C000212330_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,460,122          
C000157966_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157966_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157966_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,748,091          
C000157966_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,454,018          
C000157966_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,163,264          
C000157966_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,452,249          
C000157966_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,979,040          
C000157966_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,628,137          
C000157966_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 8,957,909          
C000157966_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,339,022          
C000157966_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 9,681,124          
C000157966_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,283,540          
C000157966_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2035 Composite Index℠</span>
C000157966_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157966_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,751,667          
C000157966_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,457,599          
C000157966_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,167,723          
C000157966_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,469,456          
C000157966_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,001,755          
C000157966_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 8,667,258          
C000157966_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,032,076          
C000157966_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 8,390,947          
C000157966_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 9,761,594          
C000157966_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 10,362,676          
C000157966_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157966_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157966_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157966_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157966_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157966_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157966_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157966_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157966_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157966_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157966_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157966_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,852,618          
C000157964_LG_ClassMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Institutional Premium Class</span>
C000157964_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157964_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,846,649          
C000157964_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,367,088          
C000157964_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,881,141          
C000157964_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,157,643          
C000157964_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 5,990,620          
C000157964_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,810,213          
C000157964_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 7,962,951          
C000157964_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,436,555          
C000157964_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 8,319,007          
C000157964_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,808,258          
C000157964_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Freedom Index 2025 Composite Index℠</span>
C000157964_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157964_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,850,328          
C000157964_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,372,296          
C000157964_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 5,889,816          
C000157964_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 6,176,845          
C000157964_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,010,677          
C000157964_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 7,850,629          
C000157964_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 8,027,130          
C000157964_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 7,483,486          
C000157964_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 8,390,320          
C000157964_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 8,877,405          
C000157964_LG_2_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span>
C000157964_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 5,000,000          
C000157964_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 4,967,470          
C000157964_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 5,820,498          
C000157964_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 6,634,891          
C000157964_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 7,264,973          
C000157964_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 6,758,028          
C000157964_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,566,289          
C000157964_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,219,469          
C000157964_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,275,094          
C000157964_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,644,221          
C000157964_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value $ 15,852,618