Investing primarily in a combination of Fidelity® U.S. equity funds, international equity funds, bond funds, and short-term funds (underlying Fidelity® funds), each of which (excluding any money market fund) seeks to provide investment results that correspond to the total return of a specific index. Allocating assets according to an asset allocation strategy shown in the glide path below that adjusts over time until it reaches an allocation similar to that of the Fidelity Freedom® Index Retirement Fund, approximately 15 to 20 years after the year 2050. Fidelity Management & Research Company LLC (FMR) (the Adviser) may modify the fund's asset allocations from time to time when in the interests of shareholders. A revised asset allocation strategy for the fund is expected to take effect by the end of the first quarter of 2027, as illustrated in the following chart. The Adviser has begun transitioning the asset allocation percentages to achieve the desired allocations.     The asset allocation shown in the glide path depicts the allocation to U.S. equity funds (including commodity funds), international equity funds, bond funds (including U.S. investment grade bond, international bond, inflation-protected bond, and long-term treasury bond funds), and short-term funds. Buying and selling futures contracts (both long and short positions) in an effort to manage cash flows efficiently, remain fully invested, or facilitate asset allocation. The Adviser, under normal market conditions, will make investments that are consistent with seeking high total return for several years beyond the fund's target retirement date in an effort to achieve the fund's overall investment objective. Designed for investors who anticipate retiring in or within a few years of 2050 (target retirement date) at or around age 65. When the asset allocation of a fund matches Fidelity Freedom ® Index Retirement Fund's asset allocation (approximately 15 to 20 years after the year indicated in the fund's name), the Board of Trustees may combine the fund with Fidelity Freedom ® Index Retirement Fund, without shareholder approval, and the fund's shareholders will become shareholders of Fidelity Freedom ® Index Retirement Fund.