CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock at Cost	Non-controlling Interests
Beginning balance at Dec. 31, 2022	$ 4,175.6	$ 0.6	$ 695.5	$ (203.4)	$ 5,718.2	$ (2,980.6)	$ 945.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	906.1				672.9		233.2
Other comprehensive income (loss), net of tax	41.9			35.8			6.1
Share-based compensation	59.4		59.4
Common stock issued under share-based incentive plans	(31.3)		(47.2)			15.9
Share repurchases, inclusive of excise tax	(352.3)		59.1			(411.4)
Dividends	(1.5)				(1.5)
Affiliate equity-related activities:
Affiliate equity expense	52.5		13.4				39.1
Issuances	16.4		(13.7)				30.1
Purchases	8.1		13.6				(5.5)
Changes in redemption value of Redeemable non-controlling interests	(55.5)		(55.5)
Transfer (to) from Redeemable non-controlling interests	8.9						8.9
Capital contributions and other	13.5						13.5
Distributions to non-controlling interests	(271.3)						(271.3)
Effect of deconsolidation of Affiliates	(0.4)		16.8				(17.2)
Ending balance at Dec. 31, 2023	4,570.1	0.6	741.4	(167.6)	6,389.6	(3,376.1)	982.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	740.6				511.6		229.0
Other comprehensive income (loss), net of tax	2.1			4.0			(1.9)
Share-based compensation	52.0		52.0
Common stock issued under share-based incentive plans	(86.7)		(44.2)			(42.5)
Share repurchases, inclusive of excise tax	(706.0)					(706.0)
Dividends	(1.4)				(1.4)
Affiliate equity-related activities:
Affiliate equity expense	55.0		15.6				39.4
Issuances	6.3		(4.3)				10.6
Purchases	(24.0)		(3.5)				(20.5)
Changes in redemption value of Redeemable non-controlling interests	(23.9)		(23.9)
Transfer (to) from Redeemable non-controlling interests	(1.7)						(1.7)
Capital contributions and other	(26.2)						(26.2)
Distributions to non-controlling interests	(258.0)						(258.0)
Ending balance at Dec. 31, 2024	4,298.2	0.6	733.1	(163.6)	6,899.8	(4,124.6)	952.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	904.0				716.6		187.4
Other comprehensive income (loss), net of tax	69.7			56.8			12.9
Share-based compensation	59.2		59.2
Common stock issued under share-based incentive plans	(105.2)		(48.5)			(56.7)
Conversion premium on junior convertible securities, net of tax	(116.6)		(116.6)
Share repurchases, inclusive of excise tax	(705.6)					(705.6)
Dividends	(1.0)				(1.0)
Affiliate equity-related activities:
Affiliate equity expense	62.9		30.7				32.2
Issuances	11.9		(20.5)				32.4
Purchases	(16.6)		60.8				(77.4)
Changes in redemption value of Redeemable non-controlling interests	(82.1)		(82.1)
Transfer (to) from Redeemable non-controlling interests	53.0						53.0
Capital contributions and other	(4.2)						(4.2)
Distributions to non-controlling interests	(252.3)						(252.3)
Ending balance at Dec. 31, 2025	$ 4,175.3	$ 0.6	$ 616.1	$ (106.8)	$ 7,615.4	$ (4,886.9)	$ 936.9