Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Allowance for doubtful accounts receivable	$ 27.4	$ 25.1
Accumulated amortization of finite-lived intangible assets	$ 4,203.6	$ 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	277,300,000	275,900,000
Common stock, shares outstanding	247,200,000	246,600,000
Treasury stock	30,100,000	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