Statements of Net Assets Available for Benefits - Navient 401(k) Savings Plan [Member] - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Statements of Net Assets Available for Benefits [Abstract]
Investments, at fair value	$ 643,029,010	$ 687,690,167
Notes receivable from participants	2,808,815	6,333,718
Net assets available for benefits	$ 645,837,825	$ 694,023,885

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details

- Definition

Amount of asset less liability available to pay benefit of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, aggregation of participants' individual account balances.

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+ Details

- 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.

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