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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2023
Fair Value Disclosures [Abstract] |
Valuation of Financial Instruments that are Marked-to-Market on Recurring Basis | 11. Fair Value Measurements (Continued) The following table summarizes the valuation of our financial instruments that are marked-to-market on a recurring basis. During 2023 and 2022, there were no significant transfers of financial instruments between levels.
|  | Fair Value Measurements on a Recurring Basis |
|  | December 31, 2023 |  |  | December 31, 2022 |
(Dollars in millions) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments:(1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  |  | — |  |  |  | 55 |  |  |  | — |  |  |  | 55 |  |  |  | — |  |  |  | 55 |  |  |  | 1 |  |  |  | 56 |
Cross-currency interest rate swaps |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total derivative assets(2) |  |  | — |  |  |  | 55 |  |  |  | — |  |  |  | 55 |  |  |  | — |  |  |  | 55 |  |  |  | 1 |  |  |  | 56 |
Total |  | $ | — |  |  | $ | 55 |  |  | $ | — |  |  | $ | 55 |  |  | $ | — |  |  | $ | 55 |  |  | $ | 1 |  |  | $ | 56 |
Liabilities(3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments(1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | — |  |  | $ | — |  |  | $ | (1 | ) |  | $ | (1 | ) |  | $ | — |  |  | $ | (2 | ) |  | $ | (3 | ) |  | $ | (5 | )
Floor Income Contracts |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Cross-currency interest rate swaps |  |  | — |  |  |  | — |  |  |  | (189 | ) |  |  | (189 | ) |  |  | — |  |  |  | — |  |  |  | (253 | ) |  |  | (253 | )
Total derivative liabilities(2) |  |  | — |  |  |  | — |  |  |  | (190 | ) |  |  | (190 | ) |  |  | — |  |  |  | (2 | ) |  |  | (256 | ) |  |  | (258 | )
Total |  | $ | — |  |  | $ | — |  |  | $ | (190 | ) |  | $ | (190 | ) |  | $ | — |  |  | $ | (2 | ) |  | $ | (256 | ) |  | $ | (258 | )
(1) Fair value of derivative instruments excludes accrued interest and the value of collateral. (2) See “Note 7 — Derivative Financial Instruments" for a reconciliation of gross positions without the impact of master netting agreements to the balance sheet classification. Borrowings which are the hedged item in a fair value hedge relationship and which are adjusted for changes in value due to benchmark interest rates only are not carried at full fair value and not reflected in this table.
Change in Balance Sheet Carrying Value Associated with Level 3 Financial Instruments Carried at Fair Value on Recurring Basis | 11. Fair Value Measurements (Continued) The following tables summarize the change in balance sheet carrying value associated with level 3 financial instruments carried at fair value on a recurring basis.
|  | Year Ended December 31, 2023 |
|  | Derivative Instruments |
(Dollars in millions) |  | Interest Rate Swaps |  |  | Cross Currency Interest Rate Swaps |  |  | Other |  |  | Total Derivative Instruments |
Balance, beginning of period |  | $ | (2 | ) |  | $ | (253 | ) |  | $ | — |  |  | $ | (255 | )
Total gains/(losses): |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings(1) |  |  | 1 |  |  |  | 17 |  |  |  | — |  |  |  | 18 |
Included in other comprehensive income |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Settlements |  |  | — |  |  |  | 47 |  |  |  | — |  |  |  | 47 |
Transfers in and/or out of level 3 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Balance, end of period |  | $ | (1 | ) |  | $ | (189 | ) |  | $ | — |  |  | $ | (190 | )
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date(2) |  | $ | 1 |  |  | $ | 64 |  |  | $ | — |  |  | $ | 65 |
|  | Year Ended December 31, 2022 |
|  | Derivative Instruments |
(Dollars in millions) |  | Interest Rate Swaps |  |  | Cross Currency Interest Rate Swaps |  |  | Other |  |  | Total Derivative Instruments |
Balance, beginning of period |  | $ | (4 | ) |  | $ | (190 | ) |  | $ | — |  |  | $ | (194 | )
Total gains/(losses): |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings(1) |  |  | 1 |  |  |  | (105 | ) |  |  | — |  |  |  | (104 | )
Included in other comprehensive income |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Settlements |  |  | 1 |  |  |  | 42 |  |  |  | — |  |  |  | 43 |
Transfers in and/or out of level 3 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Balance, end of period |  | $ | (2 | ) |  | $ | (253 | ) |  | $ | — |  |  | $ | (255 | )
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date(2) |  | $ | 1 |  |  | $ | (63 | ) |  | $ | — |  |  | $ | (62 | )
|  | Year Ended December 31, 2021 |
|  | Derivative Instruments |
(Dollars in millions) |  | Interest Rate Swaps |  |  | Cross Currency Interest Rate Swaps |  |  | Other |  |  | Total Derivative Instruments |
Balance, beginning of period |  | $ | (8 | ) |  | $ | (294 | ) |  | $ | — |  |  | $ | (302 | )
Total gains/(losses): |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings(1) |  |  | 3 |  |  |  | 81 |  |  |  | — |  |  |  | 84 |
Included in other comprehensive income |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Settlements |  |  | 1 |  |  |  | 23 |  |  |  | — |  |  |  | 24 |
Transfers in and/or out of level 3 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Balance, end of period |  | $ | (4 | ) |  | $ | (190 | ) |  | $ | — |  |  | $ | (194 | )
Change in mark-to-market gains/(losses) relating to instruments still held at the reporting date(2) |  | $ | 3 |  |  | $ | (157 | ) |  | $ | — |  |  | $ | (154 | )
“Included in earnings” is comprised of the following amounts recorded in the specified line item in the consolidated statements of income:
Included in Earnings |
|  | Years Ended December 31, |
(Dollars in millions) |  | 2023 |  |  | 2022 |  |  | 2021 |
Gains (losses) on derivative and hedging activities, net |  | $ | 1 |  |  | $ | 1 |  |  | $ | 3 |
Interest expense |  |  | 17 |  |  |  | (105 | ) |  |  | 81 |
Total |  | $ | 18 |  |  | $ | (104 | ) |  | $ | 84 |
Recorded in “gains (losses) on derivative and hedging activities, net” in the consolidated statements of income.
Unobservable Data Used in Recurring Valuations of Level 3 | 11. Fair Value Measurements (Continued) The following table presents the significant inputs that are unobservable or from inactive markets used in the recurring valuations of the level 3 financial instruments detailed above.
(Dollars in millions) |  | Fair Value at December 31, 2023 |  |  | Valuation Technique |  | Input |  | Range and Weighted Average
Derivatives |  |  |  |  |  |  |  |  |
Prime basis swaps |  | $ | (1 | ) |  | Discounted cash flow |  | Constant Prepayment Rate |  | 10%
|  |  |  |  |  |  | Bid/ask adjustment to discount rate |  | 0.08%
Cross-currency interest rate swaps |  |  | (189 | ) |  | Discounted cash flow |  | Constant Prepayment Rate |  | 5%
Other |  |  | — |  |  |  |  |  |  |
Total |  | $ | (190 | ) |  |  |  |  |  |
Fair Values of Financial Assets and Liabilities, Including Derivative Financial Instruments | The following table summarizes the fair values of our financial assets and liabilities, including derivative financial instruments.
|  | December 31, 2023 |  |  | December 31, 2022 |
(Dollars in millions) |  | Fair Value |  |  | Carrying Value |  |  | Difference |  |  | Fair Value |  |  | Carrying Value |  |  | Difference |
Earning assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FFELP Loans |  | $ | 36,590 |  |  | $ | 37,925 |  |  | $ | (1,335 | ) |  | $ | 41,426 |  |  | $ | 43,525 |  |  | $ | (2,099 | )
Private Education Loans |  |  | 16,287 |  |  |  | 16,902 |  |  |  | (615 | ) |  |  | 17,880 |  |  |  | 18,725 |  |  |  | (845 | )
Cash and investments |  |  | 2,939 |  |  |  | 2,939 |  |  |  | — |  |  |  | 4,974 |  |  |  | 4,974 |  |  |  | — |
Total earning assets |  |  | 55,816 |  |  |  | 57,766 |  |  |  | (1,950 | ) |  |  | 64,280 |  |  |  | 67,224 |  |  |  | (2,944 | )
Interest-bearing liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term borrowings |  |  | 4,237 |  |  |  | 4,226 |  |  |  | (11 | ) |  |  | 5,879 |  |  |  | 5,870 |  |  |  | (9 | )
Long-term borrowings |  |  | 51,566 |  |  |  | 53,402 |  |  |  | 1,836 |  |  |  | 57,652 |  |  |  | 61,026 |  |  |  | 3,374 |
Total interest-bearing liabilities |  |  | 55,803 |  |  |  | 57,628 |  |  |  | 1,825 |  |  |  | 63,531 |  |  |  | 66,896 |  |  |  | 3,365 |
Derivative financial instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floor Income Contracts |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Interest rate swaps |  |  | 54 |  |  |  | 54 |  |  |  | — |  |  |  | 51 |  |  |  | 51 |  |  |  | — |
Cross-currency interest rate swaps |  |  | (189 | ) |  |  | (189 | ) |  |  | — |  |  |  | (253 | ) |  |  | (253 | ) |  |  | — |
Other |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Excess of net asset fair value over carrying value |  |  |  |  |  |  |  | $ | (125 | ) |  |  |  |  |  |  |  | $ | 421 |

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