CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Common stock Common Class A	Common stock Common Class B	Common stock Exchangeable Class A	Common stock Exchangeable Class B	Paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Common stock held in treasury Class B	Noncontrolling interests
Beginning balance at Dec. 31, 2024	$ 13,284.2	$ 0.0	$ 2.1	$ 100.8	$ 271.1	$ 7,223.6	$ 8,238.0	$ (1,362.4)	$ (1,380.8)	$ 191.8	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares	0.0				(3.6)	3.6
Shares issued under equity compensation plan	(16.0)		0.1			(16.1)
Amortization of share-based compensation	11.9					11.9
Purchase of noncontrolling interest	(0.2)					(0.1)				(0.1)	[1]
Net income (loss) including noncontrolling interests	126.8						121.0			5.8	[1]
Other comprehensive income (loss), net of tax	37.3
Other comprehensive income (loss), net of tax	37.2							37.0		0.2	[1]
Share repurchase program	(59.9)								(59.9)
Distributions and dividends to noncontrolling interests	(2.0)									(2.0)	[1]
Dividends declared	(96.0)						(96.0)
Ending balance at Mar. 31, 2025	13,286.0	0.0	2.2	100.8	267.5	7,222.9	8,263.0	(1,325.4)	(1,440.7)	195.7	[1]
Beginning balance at Dec. 31, 2025	10,427.1	0.0	2.2	100.8	266.9	7,247.2	5,723.7	(1,071.6)	(2,038.9)	196.8	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	(10.6)					(10.6)
Amortization of share-based compensation	8.2					8.2
Net income (loss) including noncontrolling interests	152.1						151.3			0.8
Other comprehensive income (loss), net of tax	(66.7)							(66.5)		(0.2)
Redeemable noncontrolling interest redemption value adjustment	(0.4)					(0.4)
Share repurchase program	(165.8)								(165.8)
Distributions and dividends to noncontrolling interests	(2.0)									(2.0)
Dividends declared	(90.7)						(90.7)
Ending balance at Mar. 31, 2026	$ 10,251.2	$ 0.0	$ 2.2	$ 100.8	$ 266.9	$ 7,244.4	$ 5,784.3	$ (1,138.1)	$ (2,204.7)	$ 195.4	[1]

[1] All activity included in the noncontrolling interests column of the unaudited condensed consolidated statements of stockholders' equity and noncontrolling interests excludes activity from our redeemable noncontrolling interests.