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Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets
Trade receivables, allowances	$ 72.8	$ 67.6
Contract with Customer, Asset, Allowance for Credit Loss, Current	2.5	2.5
Property and equipment, accumulated depreciation	955.8	909.1
Identified intangibles, with finite useful lives, accumulated amortization	423.6	340.1
Investments, Fair Value Disclosure	$ 786.7	$ 639.6
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	52,085,128	52,076,800
Common Stock, Shares, Outstanding	47,516,574	50,024,139
Treasury Stock, Shares	4,568,554	2,052,661
Long-term senior notes, 4.4%, due November 2022 [Member]
Unamortized Debt Issuance Expense	$ 0.0	$ 0.3
Long-Term Senior Notes [Member]
Unamortized Debt Issuance Expense	1.3	1.4
Line of Credit [Member]
Unamortized Debt Issuance Expense	$ 12.1	$ 11.8

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