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GOODWILL AND INTANGIBLES (Tables) | 3 Months Ended
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Mar. 31, 2017
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, 2016 | $ | 1,877.5 |  |  | $ | 296.6 |  |  | $ | 2,174.1 |
Acquisition activity | (23.3 | ) |  | (5.5 | ) |  | (28.8 | )
Foreign currency translation adjustment | 0.6 |  |  | 0.2 |  |  | 0.8 |
Balance at March 31, 2016 | $ | 1,854.8 |  |  | $ | 291.3 |  |  | $ | 2,146.1 |
Balance at January 1, 2017 | $ | 1,831.3 |  |  | $ | 286.7 |  |  | 2,118.0 |
Foreign currency translation adjustment | 0.8 |  |  | 0.2 |  |  | 1.0 |
Balance at March 31, 2017 | $ | 1,832.1 |  |  | $ | 286.9 |  |  | $ | 2,119.0 |
Schedule of Finite-Lived Intangible Assets | Intangible assets consisted of the following:
|  | March 31, 2017 |  | December 31, 2016 |  | March 31, 2016
|  | Gross Amount | Accumulated Amortization | Net |  | Gross Amount | Accumulated Amortization | Net |  | Gross Amount | Accumulated Amortization | Net
|  | ($ in millions)
Customers, customer contracts and relationships |  | $ | 669.2 |  |  | $ | (125.3 | ) |  | $ | 543.9 |  |  | $ | 667.8 |  |  | $ | (112.9 | ) |  | $ | 554.9 |  |  | $ | 643.8 |  |  | $ | (75.9 | ) |  | $ | 567.9 |
Trade name |  | 6.9 |  |  | (2.1 | ) |  | 4.8 |  |  | 17.8 |  |  | (12.7 | ) |  | 5.1 |  |  | 17.9 |  |  | (2.7 | ) |  | 15.2 |
Acquired technology |  | 84.4 |  |  | (18.1 | ) |  | 66.3 |  |  | 84.2 |  |  | (15.0 | ) |  | 69.2 |  |  | 85.2 |  |  | (5.7 | ) |  | 79.5 |
Other |  | 2.3 |  |  | (1.9 | ) |  | 0.4 |  |  | 2.3 |  |  | (1.9 | ) |  | 0.4 |  |  | 2.3 |  |  | (1.7 | ) |  | 0.6 |
Total intangible assets |  | $ | 762.8 |  |  | $ | (147.4 | ) |  | $ | 615.4 |  |  | $ | 772.1 |  |  | $ | (142.5 | ) |  | $ | 629.6 |  |  | $ | 749.2 |  |  | $ | (86.0 | ) |  | $ | 663.2 |

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