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Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income | Components of other comprehensive income (loss) consist of the following:
|  | Foreign |  | Gain/(Loss) |  | Employee |  | Gain/(Loss) |  | Total Accumulated
|  | Currency |  | On |  | Benefit |  | On Derivatives |  | Other Comprehensive
(Dollars in Millions) |  | Translation |  | Securities |  | Plans |  | & Hedges |  | Income (Loss)
December 31, 2017 |  | $ | (7,351 | ) |  | 232 |  |  | (6,150 | ) |  | 70 |  |  | (13,199 | )
Net change |  | (1,718 | ) |  | (1 | ) |  | 557 |  |  | (54 | ) |  | (1,216 | )
Cumulative adjustment to retained earnings |  |  |  | (232 | ) | (1) |  |  |  |  | (232 | )
September 30, 2018 |  | $ | (9,069 | ) |  | (1 | ) |  | (5,593 | ) |  | 16 |  |  | (14,647 | )
(1) See Note 1 to the Consolidated Financial Statements for additional details on the adoption of ASU 2016-01

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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