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Cover
12 Months Ended
Dec. 31, 2023
Cover [Abstract]  
Entity Registrant Name Navient Corporation
Entity Central Index Key 0001593538
Document Type DEFR14A
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Emerging Growth Company false
Document Period End Date Dec. 31, 2023
Entity Filer Category Non-accelerated Filer