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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Statement of Comprehensive Income [Abstract] |  |
Net income | $ 88 | $ 181
Other comprehensive income (loss): |  |
Unrealized hedging gains (losses) on derivatives | 25 | (129)
Reclassification adjustments for derivative (gains) losses included in net income (interest expense) | 0 | 0
Total unrealized gains (losses) on derivatives | 25 | (129)
Income tax (expense) benefit | (9) | 48
Other comprehensive income (loss), net of tax expense (benefit) | 16 | (81)
Total comprehensive income attributable to Navient Corporation | $ 104 | $ 100

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