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Changes in Accumulated Other Comprehensive Loss | 3 Months Ended
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Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Changes in Accumulated Other Comprehensive Loss. | 14. Changes in Accumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss consists of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Translation | ​ | Post-Retirement | ​ | ​ | ​
​ | ​ | Adjustments, Net | ​ | Benefits and | ​ | ​ | ​
​ |  | of Tax |  | Other, Net of Tax |  | Total
​ | ​ | (in millions)
Balance, December 31, 2020 | ​ | $ | (31) | ​ | $ | (49) | ​ | $ | (80)
Other comprehensive loss before reclassifications, net of tax | ​ |  | (1) | ​ |  | — | ​ |  | (1)
Reclassifications from accumulated other comprehensive loss to earnings, net of tax | ​ |  | — | ​ |  | — | ​ |  | —
Other comprehensive loss, net of tax | ​ |  | (1) | ​ |  | — | ​ |  | (1)
Balance, March 31, 2021 | ​ | $ | (32) | ​ | $ | (49) | ​ | $ | (81)
​

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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