XML 74 R60.htm IDEA: XBRL DOCUMENT v3.21.2
Fair Value Measurements - Fair Values of Financial Assets and Liabilities, Including Derivative Financial Instruments (Detail) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Total earning assets, Carrying Value $ 79,350 $ 83,185  
Short-term borrowings, Carrying Value 4,068 6,613  
Long-term borrowings, Carrying Value 75,814 77,332  
Total 79,882 83,945  
Total earning assets, Fair Value 81,935 85,401  
Short-term borrowings, Fair Value 4,111 6,626  
Long-term borrowings, Fair Value 76,156 76,719  
Total interest-bearing liabilities, Fair Value 80,267 83,345  
FFELP Loans [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Loans, Carrying Value 55,550 58,284  
Loans receivable, Fair Value 57,002 59,117  
Floor Income Contracts [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative financial instruments, Carrying Value (139) (197)  
Derivative financial instruments, Fair Value (139) (197)  
Interest Rate Swaps [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative financial instruments, Carrying Value 254 315  
Derivative financial instruments, Fair Value 254 315  
Cross-Currency Interest Rate Swaps [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative financial instruments, Carrying Value (108) (294)  
Derivative financial instruments, Fair Value (108) (294)  
Private Education Loans [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Loans, Carrying Value 19,725 21,079 $ 21,462
Loans receivable, Fair Value 20,858 22,462  
Difference [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Total earning assets, Fair Value 2,585 2,216  
Short-term borrowings, Fair Value (43) (13)  
Long-term borrowings, Fair Value (342) 613  
Total interest-bearing liabilities, Fair Value (385) 600  
Excess of net asset fair value over carrying value 2,200 2,816  
Difference [Member] | FFELP Loans [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Loans receivable, Fair Value 1,452 833  
Difference [Member] | Private Education Loans [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Loans receivable, Fair Value 1,133 1,383  
Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and investments 4,075 3,822  
Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and investments $ 4,075 $ 3,822