Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ 5,784.5	$ 6,821.3	$ 5,706.2	$ 2,930.2
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(297.3)	(322.2)	$ (247.5)	$ (208.7)
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(292.8)	(322.0)
Unrealized losses on defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ (4.5)	$ (0.2)