Goodwill and Intangible Assets - Changes in Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2020
Goodwill [Roll Forward]
Balance, beginning of the year	$ 5,325.3
Divesture	(6.1)
Foreign currency translation, net	(1.6)
Balance, ending of the year	5,317.6
Americas
Goodwill [Roll Forward]
Balance, beginning of the year	5,325.3
Divesture	(6.1)
Foreign currency translation, net	(1.6)
Balance, ending of the year	5,317.6
Accumulated impairment loss	1,513.3	$ 1,513.3
EMEA&APAC
Goodwill [Roll Forward]
Balance, beginning of the year	0.0
Divesture	0.0
Foreign currency translation, net	0.0
Balance, ending of the year	$ 0.0
Accumulated impairment loss			$ 1,484.3