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Subsequent Event (Notes) | 12 Months Ended
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Dec. 31, 2019
Subsequent Events [Abstract] |
Subsequent Events [Text Block] | 19. Subsequent Events On February 7, 2020, the Company announced it had entered into a definitive agreement to acquire the Stericycle Environmental Solutions Business ("ESOL"), an established hazardous waste transportation and processing solutions provider from Stericycle, Inc. Under the terms of the agreement, the Company will acquire ESOL for $462.5 million in cash, subject to post-closing adjustments. The transaction has been approved by the Company's Board and is expected to close by March 31, 2020 subject to customary closing conditions, including regulatory approvals.

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -URI http://asc.fasb.org/topic&trid=2122774 + Details
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