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Segment Reporting - Asset Information for Loans Segment (Detail) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Other | $ 3,383 | $ 3,404
Total assets | 98,320 | 104,176
Federal Education Loans [Member] |  |
Segment Reporting Information [Line Items] |  |
Loans, net | 67,956 | 72,253
Cash and investments | 2,219 | 3,368
Other | 2,174 | 2,100
Total assets | 72,349 | 77,721
Consumer Lending [Member] |  |
Segment Reporting Information [Line Items] |  |
Loans, net | 21,564 | 22,245
Cash and investments | 931 | 732
Other | 1,012 | 1,076
Total assets | $ 23,507 | $ 24,053

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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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