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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 125	$ 182	$ 305	$ 474
Other comprehensive income (loss):
Unrealized hedging gains (losses) on derivatives	(62)	15	(191)	(55)
Reclassification adjustments for derivative (gains) losses included in net income (interest expense)				(1)
Total unrealized gains (losses) on derivatives	(62)	15	(191)	(56)
Income tax (expense) benefit	23	(5)	71	21
Other comprehensive income (loss), net of tax expense (benefit)	(39)	10	(120)	(35)
Total comprehensive income attributable to Navient Corporation	$ 86	$ 192	$ 185	$ 439

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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