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Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Assets
Trade receivables, allowances	$ 68.3	$ 52.0
Property and equipment, accumulated depreciation	638.0	588.3
Identified intangibles, with finite useful lives, accumulated amortization	191.9	169.8
Investments, Fair Value Disclosure	$ 304.2	$ 247.3
Company shareholders' equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common Stock, Shares, Issued	51,534,119	45,599,418
Common stock, shares outstanding (in shares)	51,534,119	45,599,418
Long-Term Senior Notes [Member]
Line of Credit Facility [Line Items]
Unamortized Debt Issuance Expense	$ 3.3	$ 3.7
Line of Credit [Member]
Line of Credit Facility [Line Items]
Unamortized Debt Issuance Expense	$ 13.2	$ 15.9

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