Shareholder Report, Line Graph (Details) - USD ($)	12 Months Ended	36 Months Ended	96 Months Ended	108 Months Ended	120 Months Ended	132 Months Ended
	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2026
C000182220_LG_ClassMember_10YRMember
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;">Class K6</span>
C000182220_ClassMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	$ 10,000
C000182220_ClassMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,269
C000182220_ClassMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,626
C000182220_ClassMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	10,773
C000182220_ClassMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,267
C000182220_ClassMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,180
C000182220_ClassMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,666
C000182220_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	12,377
C000182220_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,064
C000182220_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	14,131
C000182220_LG_1_AdditionalIndexMember_10YRMember
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 Retirement Composite Index℠</span>
C000182220_1_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,000
C000182220_1_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,246
C000182220_1_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,688
C000182220_1_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,107
C000182220_1_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,218
C000182220_1_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,182
C000182220_1_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,717
C000182220_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	12,437
C000182220_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,126
C000182220_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	14,060
C000182220_LG_2_AdditionalIndexMember_10YRMember
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>
C000182220_2_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,000
C000182220_2_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	9,938
C000182220_2_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,384
C000182220_2_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,311
C000182220_2_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,392
C000182220_2_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	10,919
C000182220_2_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	10,396
C000182220_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,573
C000182220_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	11,089
C000182220_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	11,571
C000205064_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;">Class Z</span>
C000205064_ClassMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,000
C000205064_ClassMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,247
C000205064_ClassMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	10,387
C000205064_ClassMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,811
C000205064_ClassMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	11,723
C000205064_ClassMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,228
C000205064_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	11,883
C000205064_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	12,522
C000205064_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	13,523
C000205064_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 Retirement Composite Index℠</span>
C000205064_1_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,000
C000205064_1_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,264
C000205064_1_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	10,666
C000205064_1_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,733
C000205064_1_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	11,699
C000205064_1_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,253
C000205064_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	11,944
C000205064_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	12,605
C000205064_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	13,502
C000205064_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>
C000205064_2_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,000
C000205064_2_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,460
C000205064_2_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,395
C000205064_2_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,476
C000205064_2_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	10,999
C000205064_2_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	10,473
C000205064_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,651
C000205064_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	11,171
C000205064_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	11,657
C000013237_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;">Class M</span>
C000013237_ClassMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	9,650
C000013237_ClassMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,186
C000013237_ClassMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,616
C000013237_ClassMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,911
C000013237_ClassMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,009
C000013237_ClassMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,448
C000013237_ClassMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,284
C000013237_ClassMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,704
C000013237_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	12,321
C000013237_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	12,914
C000013237_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	13,876
C000013237_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 Retirement Composite Index℠</span>
C000013237_1_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013237_1_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,415
C000013237_1_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,867
C000013237_1_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	11,335
C000013237_1_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,779
C000013237_1_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,958
C000013237_1_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,920
C000013237_1_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	12,427
C000013237_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	13,191
C000013237_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,921
C000013237_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	14,911
C000013237_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>
C000013237_2_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013237_2_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,044
C000013237_2_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,165
C000013237_2_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,620
C000013237_2_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,569
C000013237_2_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,651
C000013237_2_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	11,168
C000013237_2_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	10,633
C000013237_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,814
C000013237_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	11,342
C000013237_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	11,835
C000013238_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;">Class I</span>
C000013238_ClassMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013238_ClassMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,607
C000013238_ClassMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	11,106
C000013238_ClassMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	11,473
C000013238_ClassMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,622
C000013238_ClassMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	13,217
C000013238_ClassMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	13,111
C000013238_ClassMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	12,557
C000013238_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	13,279
C000013238_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,982
C000013238_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	15,099
C000013238_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 Retirement Composite Index℠</span>
C000013238_1_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013238_1_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,415
C000013238_1_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,867
C000013238_1_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	11,335
C000013238_1_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,779
C000013238_1_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,958
C000013238_1_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,920
C000013238_1_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	12,427
C000013238_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	13,191
C000013238_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,921
C000013238_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	14,911
C000013238_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>
C000013238_2_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013238_2_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,044
C000013238_2_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,165
C000013238_2_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,620
C000013238_2_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,569
C000013238_2_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,651
C000013238_2_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	11,168
C000013238_2_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	10,633
C000013238_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,814
C000013238_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	11,342
C000013238_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	11,835
C000013236_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;">Class C</span>
C000013236_ClassMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013236_ClassMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,499
C000013236_ClassMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,886
C000013236_ClassMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	11,142
C000013236_ClassMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,175
C000013236_ClassMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,571
C000013236_ClassMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,351
C000013236_ClassMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,700
C000013236_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	12,259
C000013236_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	12,866
C000013236_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	13,866
C000013236_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 Retirement Composite Index℠</span>
C000013236_1_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013236_1_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,415
C000013236_1_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,867
C000013236_1_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	11,335
C000013236_1_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,779
C000013236_1_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,958
C000013236_1_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,920
C000013236_1_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	12,427
C000013236_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	13,191
C000013236_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,921
C000013236_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	14,911
C000013236_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>
C000013236_2_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013236_2_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,044
C000013236_2_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,165
C000013236_2_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,620
C000013236_2_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,569
C000013236_2_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,651
C000013236_2_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	11,168
C000013236_2_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	10,633
C000013236_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,814
C000013236_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	11,342
C000013236_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	11,835
C000013234_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;">Class A</span>
C000013234_ClassMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	9,425
C000013234_ClassMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	9,966
C000013234_ClassMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,411
C000013234_ClassMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,737
C000013234_ClassMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	10,849
C000013234_ClassMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,305
C000013234_ClassMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,177
C000013234_ClassMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	11,619
C000013234_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	12,273
C000013234_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	12,881
C000013234_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	13,882
C000013234_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 Retirement Composite Index℠</span>
C000013234_1_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013234_1_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,415
C000013234_1_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,867
C000013234_1_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	11,335
C000013234_1_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,779
C000013234_1_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	12,958
C000013234_1_AdditionalIndexMember_AsOf_2022Member
Account Value [Line Items]
Accumulated Value	12,920
C000013234_1_AdditionalIndexMember_AsOf_2023Member
Account Value [Line Items]
Accumulated Value	12,427
C000013234_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	13,191
C000013234_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	13,921
C000013234_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	14,911
C000013234_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>
C000013234_2_AdditionalIndexMember_AsOf_2016Member
Account Value [Line Items]
Accumulated Value	10,000
C000013234_2_AdditionalIndexMember_AsOf_2017Member
Account Value [Line Items]
Accumulated Value	10,044
C000013234_2_AdditionalIndexMember_AsOf_2018Member
Account Value [Line Items]
Accumulated Value	10,165
C000013234_2_AdditionalIndexMember_AsOf_2019Member
Account Value [Line Items]
Accumulated Value	10,620
C000013234_2_AdditionalIndexMember_AsOf_2020Member
Account Value [Line Items]
Accumulated Value	11,569
C000013234_2_AdditionalIndexMember_AsOf_2021Member
Account Value [Line Items]
Accumulated Value	11,651
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C000250722_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,380
C000250722_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,229
C000250721_LG_ClassMember_3YRMember
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;">Class M</span>
C000250721_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	9,650
C000250721_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	9,980
C000250721_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	11,988
C000250721_LG_1_AdditionalIndexMember_3YRMember
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>
C000250721_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250721_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,441
C000250721_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,428
C000250721_LG_2_AdditionalIndexMember_3YRMember
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>
C000250721_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250721_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,380
C000250721_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,229
C000250718_LG_ClassMember_3YRMember
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;">Class C</span>
C000250718_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250718_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,303
C000250718_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,316
C000250718_LG_1_AdditionalIndexMember_3YRMember
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>
C000250718_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250718_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,441
C000250718_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,428
C000250718_LG_2_AdditionalIndexMember_3YRMember
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>
C000250718_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250718_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,380
C000250718_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,229
C000250719_LG_ClassMember_3YRMember
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;">Class I</span>
C000250719_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250719_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,382
C000250719_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,539
C000250719_LG_1_AdditionalIndexMember_3YRMember
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>
C000250719_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250719_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,441
C000250719_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,428
C000250719_LG_2_AdditionalIndexMember_3YRMember
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>
C000250719_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250719_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,380
C000250719_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,229
C000250723_LG_ClassMember_3YRMember
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;">Class Z</span>
C000250723_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250723_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,390
C000250723_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,557
C000250723_LG_1_AdditionalIndexMember_3YRMember
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>
C000250723_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250723_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,441
C000250723_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,428
C000250723_LG_2_AdditionalIndexMember_3YRMember
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>
C000250723_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250723_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,380
C000250723_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,229
C000250720_LG_ClassMember_3YRMember
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;">Class K6</span>
C000250720_ClassMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250720_ClassMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,407
C000250720_ClassMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,599
C000250720_LG_1_AdditionalIndexMember_3YRMember
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>
C000250720_1_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250720_1_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,441
C000250720_1_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	12,428
C000250720_LG_2_AdditionalIndexMember_3YRMember
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>
C000250720_2_AdditionalIndexMember_AsOf_2024Member
Account Value [Line Items]
Accumulated Value	10,000
C000250720_2_AdditionalIndexMember_AsOf_2025Member
Account Value [Line Items]
Accumulated Value	10,380
C000250720_2_AdditionalIndexMember_AsOf_2026Member
Account Value [Line Items]
Accumulated Value	$ 12,229