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Acquisitions and Divestitures - 2016 Purchase Price Allocation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |
Cash paid for acquisition of businesses | $ 21.3 | $ 120.7 | $ 430.8
2016 Acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Cash paid for acquisition of businesses |  |  | 424.3
Cash acquired |  |  | 2.6
Amounts due to sellers |  |  | 20.0
Purchase price |  |  | 446.9
Assets acquired: |  |  |
Cash and cash equivalents |  |  | 2.6
Accounts and notes receivable |  |  | 62.8
Inventories |  |  | 39.0
Property and equipment |  |  | 100.3
Goodwill and identifiable intangible assets |  |  | 291.9
Other current and long-term assets |  |  | 14.8
Liabilities assumed: |  |  |
Accrued expenses and other current liabilities |  |  | (61.0)
Long-term liabilities and deferred tax liabilities |  |  | (3.5)
Purchase price |  |  | $ 446.9

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