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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dividends per common share attributable to Navient Corporation $ 0.16 $ 0.16 $ 0.32 $ 0.32
Retained Earnings [Member]        
Dividends per common share attributable to Navient Corporation 0.16 0.16 0.32 0.32
Total Stockholders' Equity [Member]        
Dividends per common share attributable to Navient Corporation $ 0.16 $ 0.16 $ 0.32 $ 0.32