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Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
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Receivables, Net, Current [Abstract] |  |
Accounts receivable, allowances | $ 13.8 | $ 16.0
Property and equipment, accumulated depreciation | $ 10,631.6 | $ 10,233.4

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