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RESTRUCTURING INITIATIVES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring initiatives | $ 10,223 | $ 3,415 | $ 18,771 | $ 15,585
Capital expenditures |  |  | 216,689 | 173,365
Business Transformation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring initiatives | 10,200 | $ 3,400 | 18,800 | $ 15,600
Expected implementation costs | 135,000 |  | 135,000 |
Cumulative expense incurred | $ 131,800 |  | 131,800 |
Capital expenditures |  |  | $ 50,000 |

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