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Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Assets
Trade receivables, allowances	$ 72.3	$ 66.5
Contract with Customer, Asset, Allowance for Credit Loss, Current	2.1	1.8
Property and equipment, accumulated depreciation	867.3	806.2
Identified intangibles, with finite useful lives, accumulated amortization	320.7	295.3
Investments, Fair Value Disclosure	$ 505.0	$ 340.3
Company shareholders' equity
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	100,000,000
Common Stock, Shares, Issued	52,075,494	51,970,307
Common Stock, Shares, Outstanding	51,145,228	51,105,417
Treasury Stock, Shares	930,266	864,890
Long-Term Senior Notes [Member]
Unamortized Debt Issuance Expense	$ 2.1	$ 2.5
Line of Credit [Member]
Unamortized Debt Issuance Expense	$ 13.3	$ 8.7

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