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Share Repurchases Transactions and Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2019
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 on Available- for-Sale Securities |  |  | Foreign Currency Translation Adjustments |  |  | Defined Benefit Plans |  |  | Change in Fair Value of Derivative Instruments |  |  | Total |
Balances at December 31, 2018 |  | $ | 3 |  |  | $ | (283 | ) |  | $ | (148 | ) |  | $ | 47 |  |  | $ | (381 | )
Unrealized gains on available-for-sale securities, net of $3 of income taxes |  |  | 11 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11 |
Foreign currency translation adjustments, net of $1 income tax benefit |  |  | — |  |  |  | (17 | ) |  |  | — |  |  |  | — |  |  |  | (17 | )
Change in fair value of derivative instruments, net of $12 income tax benefits |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (40 | ) |  |  | (40 | )
Expense (income) reclassified into operations from other comprehensive income, net of $2 income tax benefits and $2 of income taxes, respectively |  |  | — |  |  |  | — |  |  |  | 5 |  |  |  | (9 | ) |  |  | (4 | )
Balances at June 30, 2019 |  | $ | 14 |  |  | $ | (300 | ) |  | $ | (143 | ) |  | $ | (2 | ) |  | $ | (431 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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