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Other Comprehensive Income Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  |  |  | Pension Adjustments |  |  |  |  |  |
|  | Foreign currency translation adjustments |  | Actuarial losses |  | Prior service costs |  | Unrealized gain (loss) on investments |  | Other |  | Total
Balance at December 31, 2018 |  | $ | (57 | ) |  | $ | (88 | ) |  | $ | (5 | ) |  | $ | 4 |  |  | $ | (1 | ) |  | $ | (146 | )
Other comprehensive income (loss) before reclassifications |  | 2 |  |  | — |  |  | — |  |  | (1 | ) |  | — |  |  | 1 |
Income taxes |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive income (loss) before reclassifications |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |
Amounts reclassified from accumulated comprehensive income (loss) |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Income taxes |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net amounts reclassified from cumulative other comprehensive income (loss) |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Total other comprehensive income (loss) |  | 2 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 2 |
Balance at March 31, 2019 |  | $ | (55 | ) |  | $ | (87 | ) |  | $ | (5 | ) |  | $ | 4 |  |  | $ | (1 | ) |  | $ | (144 | )
|  |  |  | Pension Adjustments |  |  |  |  |  |
|  | Foreign currency translation adjustments |  | Actuarial losses |  | Prior service costs |  | Unrealized gain (loss) on investments |  | Other |  | Total
Balance at December 31, 2017 |  | $ | (40 | ) |  | $ | (80 | ) |  | $ | (5 | ) |  | $ | 4 |  |  | $ | (2 | ) |  | $ | (122 | )
Effect of adoption of ASU 2018-02 |  | — |  |  | (17 | ) |  | — |  |  | 1 |  |  | — |  |  | (17 | )
Other comprehensive income (loss) before reclassifications |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3 |
Income taxes |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive income (loss) before reclassifications |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3 |
Amounts reclassified from accumulated other comprehensive income (loss) |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | 2 |
Income taxes |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net amounts reclassified from cumulative other comprehensive income (loss) |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Total other comprehensive income (loss) |  | 2 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 4 |
Balance at March 31, 2018 |  | $ | (37 | ) |  | $ | (96 | ) |  | $ | (5 | ) |  | $ | 4 |  |  | $ | (2 | ) |  | $ | (135 | )

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration