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Changes in Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Translation | ​ | Post-Retirement | ​ | ​ | ​
​ | ​ | Adjustments, Net | ​ | Benefits and | ​ | ​ | ​
​ |  | of Tax |  | Other, Net of Tax |  | Total
​ | ​ | (in millions)
Balance, December 31, 2019 | ​ | $ | (38) | ​ | $ | (50) | ​ | $ | (88)
Other comprehensive loss before reclassifications, net of tax | ​ |  | (2) | ​ |  | — | ​ |  | (2)
Reclassifications from accumulated other comprehensive loss to earnings, net of tax | ​ |  | 1 | ​ |  | — | ​ |  | 1
Other comprehensive loss, net of tax | ​ |  | (1) | ​ |  | — | ​ |  | (1)
Balance, June 30, 2020 | ​ | $ | (39) | ​ | $ | (50) | ​ | $ | (89)

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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=118930883&loc=SL7669686-108580 + Details
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