Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Consolidated Balance Sheets
Allowance for doubtful accounts	$ 68.4	$ 63.9
Class A Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Class A Common Stock, shares authorized	2,000.0	2,000.0
Class A Common Stock, shares issued	600.6	596.0
Class A Common Stock, shares outstanding	598.9	594.8
Treasury stock, shares	1.7	1.2