Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Abingworth	Common Stock	Common Stock Abingworth	Additional Paid-in Capital	Additional Paid-in Capital Abingworth	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests in Consolidated Entities
Beginning balance (in shares) at Dec. 31, 2020			353,500,000
Beginning balance at Dec. 31, 2020	$ 2,930.2		$ 3.5		$ 2,546.2		$ 348.2	$ (208.7)	$ 241.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased (in shares)			(3,200,000)
Shares repurchased	(161.8)						(161.8)
Equity-based compensation	166.7		$ 0.1		166.6
Shares issued for equity-based awards (in shares)			5,000,000.0
Shares issued for performance allocations (in shares)			100,000
Shares issued for performance allocations	4.8				4.8
Contributions	216.2								216.2
Dividends and distributions	(450.4)						(355.8)		(94.6)
Net income (loss)	3,045.2						2,974.7		70.5
Currency translation adjustments	(56.3)							(50.4)	(5.9)
Defined benefit plans, net	11.6							11.6
Ending balance (in shares) at Dec. 31, 2021			355,400,000
Ending balance at Dec. 31, 2021	5,706.2		$ 3.6		2,717.6		2,805.3	(247.5)	427.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased (in shares)			(5,000,000.0)
Shares repurchased	(185.6)						(185.6)
Equity-based compensation	$ 162.5				162.5
Shares issued for equity-based awards (in shares)			6,200,000
Shares issued for performance allocations (in shares)	850,110		900,000
Shares issued for performance allocations	$ 38.9				38.9
Shares issued related to the acquisition of CBAM and Abingworth (in shares)			4,200,000	600,000
Shares issued related to the acquisition of CBAM and Abingworth	194.5	$ 25.0			194.5	$ 25.0
Contributions	391.2								391.2
Dividends and distributions	(660.4)						(443.6)		(216.8)
Net income (loss)	1,284.7						1,225.0		59.7
Deconsolidation of Consolidated Entities	(47.6)								(47.6)
Non-controlling interests related to the acquisition of Abingworth	4.2								4.2
Currency translation adjustments	(107.8)							(90.2)	(17.6)
Defined benefit plans, net	$ 15.5							15.5
Ending balance (in shares) at Dec. 31, 2022	362,298,650		362,300,000
Ending balance at Dec. 31, 2022	$ 6,821.3		$ 3.6		3,138.5		3,401.1	(322.2)	600.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased (in shares)			(6,500,000)
Shares repurchased	(203.5)						(203.5)
Equity-based compensation	255.1				255.1
Shares issued for equity-based awards (in shares)			5,500,000
Dividend-equivalent rights on certain equity-based awards	$ 0.0				9.4		(9.4)
Shares issued for performance allocations (in shares)	0
Contributions	$ 177.0								177.0
Dividends and distributions	(637.4)						(497.7)		(139.7)
Net income (loss)	(496.7)						(608.4)		111.7
Deconsolidation of Consolidated Entities	(168.8)								(168.8)
Currency translation adjustments	41.7							29.1	12.6
Defined benefit plans, net	$ (4.2)							(4.2)
Ending balance (in shares) at Dec. 31, 2023	361,326,172		361,300,000
Ending balance at Dec. 31, 2023	$ 5,784.5		$ 3.6		$ 3,403.0		$ 2,082.1	$ (297.3)	$ 593.1