Summary of Significant Accounting - Summary of EBP, Risk and Uncertainty Policies (Details) - EBP 002 [Member]	Dec. 31, 2025	Dec. 31, 2024
FIAM Blend Target Date Fund 2030 Class C [Member]
EBP, Accounting Policy [Line Items]
EBP, Risk and uncertainty, concentration of investment at fair value to total investments, percentage	11.20%	11.50%
EBP, Risk and uncertainty, concentration of investment, benchmark threshold percentage	10.00%	10.00%
FIAM Blend Target Date Fund 2035 Class C [Member]
EBP, Accounting Policy [Line Items]
EBP, Risk and uncertainty, concentration of investment at fair value to total investments, percentage	12.20%	11.40%
EBP, Risk and uncertainty, concentration of investment, benchmark threshold percentage	10.00%	10.00%

Percentage of investment at fair value held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), to total investments representing concentration risk at or above applicable threshold.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

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- Definition

Threshold percentage for investment applied to benchmark used for identifying concentration risk of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 235
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479143/962-235-S50-1

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