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Changes in Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2020
Changes in Accumulated Other Comprehensive Loss [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Translation | ​ | Post-Retirement | ​ | ​ | ​
​ | ​ | Adjustments, Net | ​ | Benefits and | ​ | ​ | ​
​ |  | of Tax |  | Other, Net of Tax |  | Total
​ | ​ | (in millions)
Balance, December 31, 2019 | ​ | $ | (38) | ​ | $ | (44) | ​ | $ | (82)
Other comprehensive income (loss) before reclassifications, net of tax | ​ |  | 4 | ​ |  | (6) | ​ |  | (2)
Reclassifications from accumulated other comprehensive loss to earnings, net of tax | ​ |  | — | ​ |  | 1 | ​ |  | 1
Other comprehensive income (loss), net of tax | ​ |  | 4 | ​ |  | (5) | ​ |  | (1)
Balance, December 31, 2020 | ​ | $ | (34) | ​ | $ | (49) | ​ | $ | (83)

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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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