Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Assets
Loans, net	$ 94,498	$ 105,122
Investments
Available-for-sale	0	2
Other	226	386
Total investments	226	388
Cash and cash equivalents	1,286	1,518
Restricted cash and cash equivalents	3,976	3,128
Goodwill and acquired intangible assets, net	786	810
Other assets	3,404	4,025
Total assets	104,176	114,991
Liabilities
Short-term borrowings	5,422	4,771
Long-term borrowings	93,519	105,012
Other liabilities	1,688	1,723
Total liabilities	100,629	111,506
Commitments and contingencies
Equity
Common stock, par value $0.01 per share; 1.125 billion shares authorized: 445 million and 440 million shares issued, respectively	4	4
Additional paid-in capital	3,145	3,077
Accumulated other comprehensive income (net of tax expense of $35 and $36, respectively)	113	61
Retained earnings	3,218	3,004
Total Navient Corporation stockholders’ equity before treasury stock	6,480	6,146
Less: Common stock held in treasury at cost: 198 million and 177 million shares, respectively	(2,961)	(2,692)
Total Navient Corporation stockholders’ equity	3,519	3,454
Noncontrolling interest	28	31
Total equity	3,547	3,485
Total liabilities and equity	104,176	114,991
FFELP Loans [Member]
Assets
Loans, net	72,253	81,703
Private Education Loans [Member]
Assets
Loans, net	22,245	23,419
Assets and Liabilities of Consolidated Variable Interest Entities [Member]
Assets
Loans, net	91,619	98,596
Investments
Restricted cash	3,928	3,091
Other assets, net	956	1,160
Liabilities
Short-term borrowings	4,341	2,906
Long-term borrowings	82,738	89,317
Net assets of consolidated variable interest entities	9,424	10,624
Assets and Liabilities of Consolidated Variable Interest Entities [Member] | FFELP Loans [Member]
Assets
Loans, net	71,921	77,710
Assets and Liabilities of Consolidated Variable Interest Entities [Member] | Private Education Loans [Member]
Assets
Loans, net	$ 19,698	$ 20,886