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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue From Contract With Customer [Abstract] |
Summary of Revenues Disaggregated by Product Line | The following table presents our revenues disaggregated by product line (dollars in millions):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Packaging |  | $ | 1,718.5 |  |  | $ | 1,409.9 |  |  | $ | 3,342.1 |  |  | $ | 2,877.4 |
Paper |  |  | 142.3 |  |  |  | 123.3 |  |  |  | 306.8 |  |  |  | 340.7 |
Corporate and Other |  |  | 19.1 |  |  |  | 8.4 |  |  |  | 38.1 |  |  |  | 32.2 |
Total revenue |  | $ | 1,879.9 |  |  | $ | 1,541.6 |  |  | $ | 3,687.0 |  |  | $ | 3,250.3 |

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