Goodwill and Intangible Assets - Changes in Goodwill (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Aug. 31, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2020
Goodwill [Roll Forward]
Balance, beginning of the year				$ 5,582.3
Impairment		$ (3,645.7)	$ 0.0	(3,645.7)	$ 0.0
Foreign currency translation, net				6.9
Balance, ending of the year		1,943.5		1,943.5
Americas
Goodwill [Roll Forward]
Balance, beginning of the year				5,582.3
Impairment	$ (3,645.7)	(3,645.7)		(3,645.7)
Foreign currency translation, net				6.9
Balance, ending of the year		1,943.5		1,943.5
Accumulated impairment losses		5,159.0		5,159.0		$ 1,513.3
EMEA&APAC
Goodwill [Roll Forward]
Balance, beginning of the year				0.0
Impairment				0.0
Foreign currency translation, net				0.0
Balance, ending of the year		$ 0.0		$ 0.0
Accumulated impairment losses							$ 1,484.3