Expense Example, No Redemption - FidelitySustainableTargetDateFunds-ComboClassAMCIZPro - FidelitySustainableTargetDateFunds-ComboClassAMCIZPro - Fidelity Sustainable Target Date 2025 Fund	May 30, 2024 USD ($)
Fidelity Advisor Sustainable Target Date 2025 Fund - Class Z
Expense Example, No Redemption:
1 Year	$ 36
3 Years	113
5 Years	197
10 Years	443
Fidelity Advisor Sustainable Target Date 2025 Fund - Class C
Expense Example, No Redemption:
1 Year	148
3 Years	459
5 Years	792
10 Years	1,531
Fidelity Advisor Sustainable Target Date 2025 Fund - Class M
Expense Example, No Redemption:
1 Year	444
3 Years	642
5 Years	857
10 Years	1,476
Fidelity Advisor Sustainable Target Date 2025 Fund - Class A
Expense Example, No Redemption:
1 Year	642
3 Years	786
5 Years	942
10 Years	1,395
Fidelity Advisor Sustainable Target Date 2025 Fund - Class I
Expense Example, No Redemption:
1 Year	46
3 Years	144
5 Years	252
10 Years	$ 567

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You would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection example
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instructions
-Paragraph 4
-Subparagraph f

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