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Share Repurchase Transactions and Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2023
Federal Home Loan Banks [Abstract] |
Components of Accumulated Other Comprehensive Loss | The components of accumulated other comprehensive loss are as follows (dollars in millions):
|  | Unrealized Gains (Losses) on Available- for-Sale Securities |  |  | Foreign Currency Translation Adjustments |  |  | Defined Benefit Plans |  |  | Total |
Balances at December 31, 2022 |  | $ | (30 | ) |  | $ | (373 | ) |  | $ | (87 | ) |  | $ | (490 | )
Unrealized gains on available-for-sale securities |  |  | 2 |  |  |  |  |  |  |  |  |  | 2 |
Foreign currency translation adjustments, net of $6 of income taxes |  |  |  |  |  | 32 |  |  |  |  |  |  | 32 |
Balances at June 30, 2023 |  | $ | (28 | ) |  | $ | (341 | ) |  | $ | (87 | ) |  | $ | (456 | )

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