Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Investments
Held-to-maturity	$ 22
Other	200	$ 226
Total investments	222	226
Cash and cash equivalents	1,746	1,286
Restricted cash and cash equivalents	2,680	3,976
Goodwill and acquired intangible assets, net	769	786
Other assets	3,383	3,404
Total assets	98,320	104,176
Liabilities
Short-term borrowings	6,785	5,422
Long-term borrowings	86,776	93,519
Other liabilities	1,447	1,688
Total liabilities	95,008	100,629
Commitments and contingencies
Equity
Common stock, par value $0.01 per share, 1.125 billion shares authorized: 450 million and 445 million shares issued, respectively	4	4
Additional paid-in capital	3,181	3,145
Accumulated other comprehensive (loss) income (net of tax (benefit) expense of $(27) and $35, respectively)	(80)	113
Retained earnings	3,418	3,218
Total Navient Corporation stockholders’ equity before treasury stock	6,523	6,480
Less: Common stock held in treasury at cost: 220 million and 198 million shares, respectively	(3,222)	(2,961)
Total Navient Corporation stockholders’ equity	3,301	3,519
Noncontrolling interest	11	28
Total equity	3,312	3,547
Total liabilities and equity	98,320	104,176
FFELP Loans [Member]
Assets
Loans, net	67,956	72,253
Private Education Loans [Member]
Assets
Loans, net	21,564	22,245
Assets and Liabilities of Consolidated Variable Interest Entities [Member]
Assets
Loans, net	86,735	91,619
Investments
Restricted cash	2,640	3,928
Other assets, net	1,009	956
Liabilities
Short-term borrowings	4,904	4,341
Long-term borrowings	77,373	82,738
Net assets of consolidated variable interest entities	8,107	9,424
Assets and Liabilities of Consolidated Variable Interest Entities [Member] | FFELP Loans [Member]
Assets
Loans, net	67,700	71,921
Assets and Liabilities of Consolidated Variable Interest Entities [Member] | Private Education Loans [Member]
Assets
Loans, net	$ 19,035	$ 19,698