Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets
Trade receivables, allowances	$ 57.6	$ 51.3
Property and equipment, accumulated depreciation	583.7	514.9
Identified intangibles, with finite useful lives, accumulated amortization	161.1	165.9
Investments, Fair Value Disclosure	$ 246.0	$ 242.3
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	45,560,315	45,373,817
Common stock, shares outstanding (in shares)	45,560,315	45,373,817
Long-Term Senior Notes [Member]
Line of Credit Facility [Line Items]
Unamortized Debt Issuance Expense	$ 3.9	$ 4.3
Line of Credit [Member]
Line of Credit Facility [Line Items]
Unamortized Debt Issuance Expense	$ 16.8	$ 15.3

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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