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Acquisitions - Summary of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions |  | 3 Months Ended | 8 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |  |  |
Total consideration transferred |  | $ 0.0 | $ 1.2 |  |
Assets: |  |  |  |  |
Goodwill |  | 2,195.8 |  | $ 2,195.8 | $ 2,216.9
Product Care |  |  |  |  |
Assets: |  |  |  |  |
Goodwill |  | 1,676.6 |  | 1,676.6 | $ 1,689.0
Automated Packaging Systems |  |  |  |  |
Assets: |  |  |  |  |
Identifiable intangible assets, net | $ 80.5 |  |  |  |
Measurement Period |  |  |  |  |
Property and equipment, net |  |  |  | 2.4 |
Automated Packaging Systems | Product Care |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total consideration transferred | 445.7 | 441.4 |  |  |
Assets: |  |  |  |  |
Cash and cash equivalents | 16.0 | 15.8 |  | 15.8 |
Trade receivables, net | 37.3 | 37.3 |  | 37.3 |
Other receivables | 0.3 | 0.3 |  | 0.3 |
Inventories, net | 40.7 | 40.0 |  | 40.0 |
Prepaid expenses and other current assets | 2.3 | 2.3 |  | 2.3 |
Property and equipment, net | 76.9 | 86.2 |  | 86.2 |
Identifiable intangible assets, net | 81.1 | 80.5 |  | 80.5 |
Goodwill | 261.3 | 247.9 |  | 247.9 |
Operating lease right-of-use-assets |  | 4.3 |  | 4.3 |
Other non-current assets | 24.7 | 25.9 |  | 25.9 |
Total assets | 540.6 | 540.5 |  | 540.5 |
Liabilities: |  |  |  |  |
Accounts payable | 12.0 | 12.0 |  | 12.0 |
Current portion of long-term debt | 2.6 | 2.6 |  | 2.6 |
Current portion of operating lease liabilities |  | 1.5 |  | 1.5 |
Other current liabilities | 56.2 | 54.0 |  | 54.0 |
Long-term debt, less current portion | 4.3 | 4.3 |  | 4.3 |
Long-term operating lease liabilities, less current portion |  | 2.8 |  | 2.8 |
Deferred taxes |  | 0.5 |  | 0.5 |
Other noncurrent liabilities | 19.8 | 21.4 |  | 21.4 |
Total liabilities | $ 94.9 | $ 99.1 |  | 99.1 |
Measurement Period |  |  |  |  |
Consideration transferred |  |  |  | (4.3) |
Cash and cash equivalents |  |  |  | (0.2) |
Inventories, net |  |  |  | (0.7) |
Property and equipment, net |  |  |  | 9.3 |
Identifiable intangible assets, net |  |  |  | (0.6) |
Goodwill |  |  |  | (13.4) |
Operating lease right-of-use-assets |  |  |  | 4.3 |
Other non-current assets |  |  |  | 1.2 |
Total assets |  |  |  | (0.1) |
Current portion of operating lease liabilities |  |  |  | 1.5 |
Other current liabilities |  |  |  | (2.2) |
Long-term operating lease liabilities, less current portion |  |  |  | 2.8 |
Deferred taxes |  |  |  | 0.5 |
Other noncurrent liabilities |  |  |  | 1.6 |
Total liabilities |  |  |  | $ 4.2 |

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