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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Trade receivables, allowances | $ 67.6 | $ 66.5
Contract with Customer, Asset, Allowance for Credit Loss, Current | 2.5 | 1.8
Property and equipment, accumulated depreciation | 909.1 | 806.2
Finite-Lived Intangible Assets, Accumulated Amortization | 340.1 | 295.3
Investments, Fair Value Disclosure | $ 639.6 | $ 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 (in shares) | 52,076,800 | 51,970,307
Common stock, shares outstanding (in shares) | 50,024,139 | 51,105,417
Treasury Stock, Shares | 2,052,661 | 864,890
Line of Credit [Member] |  |
Liabilities and Equity |  |
Unamortized Debt Issuance Expense | $ 11.8 | $ 8.7
Long-Term Senior Notes [Member] |  |
Liabilities and Equity |  |
Unamortized Debt Issuance Expense | $ 1.4 | $ 2.5

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