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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 230	$ 237	$ 535	$ 711
Other comprehensive income (loss):
Unrealized hedging gains (losses) on derivatives	74	(88)	(118)	(143)
Reclassification adjustments for derivative (gains) losses included in net income (interest expense)	(1)		(1)	(1)
Total unrealized gains (losses) on derivatives	73	(88)	(119)	(144)
Income tax (expense) benefit	(28)	32	44	53
Other comprehensive income (loss), net of tax expense (benefit)	45	(56)	(75)	(91)
Total comprehensive income attributable to Navient Corporation	$ 275	$ 181	$ 460	$ 620

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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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Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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