| GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS Goodwill The following table shows changes in the carrying amount of goodwill from December 31, 2019 to June 30, 2020 by reportable segment: | | | | | | | | | | | | | | | | Performance Coatings | | Transportation Coatings | | Total | Balance at December 31, 2019 | | $ | 1,130.9 |
| | $ | 78.0 |
| | $ | 1,208.9 |
| Foreign currency translation | | 0.2 |
| | 0.2 |
| | 0.4 |
| Balance at June 30, 2020 | | $ | 1,131.1 |
| | $ | 78.2 |
| | $ | 1,209.3 |
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Identifiable Intangible Assets The following tables summarize the gross carrying amounts and accumulated amortization of identifiable intangible assets by major class: | | | | | | | | | | | | | | | | June 30, 2020 | | Gross Carrying Amount | | Accumulated Amortization | | Net Book Value | | Weighted Average Amortization Periods (years) | Technology | | $ | 541.0 |
| | $ | (338.0 | ) | | $ | 203.0 |
| | 10.4 | Trademarks - indefinite-lived | | 265.9 |
| | — |
| | 265.9 |
| | Indefinite | Trademarks - definite-lived | | 98.9 |
| | (32.8 | ) | | 66.1 |
| | 15.8 | Customer relationships | | 908.1 |
| | (290.7 | ) | | 617.4 |
| | 19.0 | Other | | 15.2 |
| | (9.5 | ) | | 5.7 |
| | 5.0 | Total | | $ | 1,829.1 |
| | $ | (671.0 | ) | | $ | 1,158.1 |
| | |
| | | | | | | | | | | | | | | | December 31, 2019 | | Gross Carrying Amount | | Accumulated Amortization | | Net Book Value | | Weighted Average Amortization Periods (years) | Technology | | $ | 540.2 |
| | $ | (310.6 | ) | | $ | 229.6 |
| | 10.4 | Trademarks—indefinite-lived | | 264.9 |
| | — |
| | 264.9 |
| | Indefinite | Trademarks—definite-lived | | 99.7 |
| | (30.1 | ) | | 69.6 |
| | 15.8 | Customer relationships | | 923.8 |
| | (271.3 | ) | | 652.5 |
| | 19.1 | Other | | 15.2 |
| | (7.9 | ) | | 7.3 |
| | 5.0 | Total | | $ | 1,843.8 |
| | $ | (619.9 | ) | | $ | 1,223.9 |
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The estimated amortization expense related to the fair value of acquired intangible assets for the remainder of 2020 and each of the succeeding five years is: | | | | | | Remainder of 2020 | | $ | 57.5 |
| 2021 | | 111.7 |
| 2022 | | 109.6 |
| 2023 | | 70.2 |
| 2024 | | 65.4 |
| 2025 | | 64.7 |
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