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Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 4,137.1	$ 3,911.8
Acquisitions, including post acquisition adjustments	225.9	269.7
Disposals and deconsolidations	(37.0)	(44.4)
Goodwill, end of period	$ 4,326.0	$ 4,137.1

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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