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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Allowance for doubtful accounts receivable $ 31.5 $ 25.1
Accumulated amortization of finite-lived intangible assets $ 4,537.8 $ 4,063.4
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares issued 282,300,000 275,900,000
Common stock, shares outstanding 247,300,000 246,600,000
Treasury stock 35,000,000 29,300,000
Class A Non-Voting Common Stock [Member]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 5,000,000 5,000,000
Common stock, shares issued 0 0