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GOODWILL AND INTANGIBLES (Tables) | 9 Months Ended
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Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | Changes in the carrying value of goodwill were as follows:
| Chlor Alkali Products and Vinyls |  | Epoxy |  | Total
| ($ in millions)
Balance at January 1, 2017 | $ | 1,831.3 |  |  | $ | 286.7 |  |  | $ | 2,118.0 |
Foreign currency translation adjustment | 1.4 |  |  | 0.4 |  |  | 1.8 |
Balance at September 30, 2017 | $ | 1,832.7 |  |  | $ | 287.1 |  |  | $ | 2,119.8 |
Balance at January 1, 2018 | $ | 1,832.9 |  |  | $ | 287.1 |  |  | 2,120.0 |
Foreign currency translation adjustment | (0.3 | ) |  | (0.1 | ) |  | (0.4 | )
Balance at September 30, 2018 | $ | 1,832.6 |  |  | $ | 287.0 |  |  | $ | 2,119.6 |
Schedule of Finite-Lived Intangible Assets | Intangible assets consisted of the following:
|  | September 30, 2018 |  | December 31, 2017 |  | September 30, 2017
|  | Gross Amount |  | Accumulated Amortization |  | Net |  | Gross Amount |  | Accumulated Amortization |  | Net |  | Gross Amount |  | Accumulated Amortization |  | Net
|  | ($ in millions)
Customers, customer contracts and relationships |  | $ | 676.2 |  |  | $ | (199.9 | ) |  | $ | 476.3 |  |  | $ | 679.5 |  |  | $ | (163.6 | ) |  | $ | 515.9 |  |  | $ | 678.0 |  |  | $ | (150.9 | ) |  | $ | 527.1 |
Trade name |  | 7.0 |  |  | (4.3 | ) |  | 2.7 |  |  | 7.1 |  |  | (3.2 | ) |  | 3.9 |  |  | 7.1 |  |  | (2.9 | ) |  | 4.2 |
Acquired technology |  | 85.6 |  |  | (36.6 | ) |  | 49.0 |  |  | 86.1 |  |  | (27.7 | ) |  | 58.4 |  |  | 85.8 |  |  | (24.5 | ) |  | 61.3 |
Other |  | 2.3 |  |  | (2.0 | ) |  | 0.3 |  |  | 2.3 |  |  | (2.0 | ) |  | 0.3 |  |  | 2.3 |  |  | (2.0 | ) |  | 0.3 |
Total intangible assets |  | $ | 771.1 |  |  | $ | (242.8 | ) |  | $ | 528.3 |  |  | $ | 775.0 |  |  | $ | (196.5 | ) |  | $ | 578.5 |  |  | $ | 773.2 |  |  | $ | (180.3 | ) |  | $ | 592.9 |

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