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	[1]
Beginning balance at Dec. 31, 2023	$ 13,407.2	$ 0.0	$ 2.1	$ 100.8	$ 352.3	$ 7,108.4	$ 7,484.3	$ (1,116.3)	$ (735.6)	$ 211.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	(13.2)					(13.2)
Amortization of share-based compensation	24.2					24.2
Purchase of noncontrolling interest	(0.1)									(0.1)
Net income (loss) including noncontrolling interests	636.2						634.8			1.4
Other comprehensive income (loss), net of tax	(101.3)							(101.0)		(0.3)
Share repurchase program	(374.5)								(374.5)
Distributions and dividends to noncontrolling interests	(2.8)									(2.8)
Dividends declared	(186.7)						(186.7)
Ending balance at Jun. 30, 2024	13,389.0	0.0	2.1	100.8	352.3	7,119.4	7,932.4	(1,217.3)	(1,110.1)	209.4
Beginning balance at Mar. 31, 2024	13,330.9	0.0	2.1	100.8	352.3	7,106.9	7,597.4	(1,192.6)	(846.8)	210.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	1.1					1.1
Amortization of share-based compensation	11.4					11.4
Purchase of noncontrolling interest	(0.1)									(0.1)
Net income (loss) including noncontrolling interests	425.7						427.0			(1.3)
Other comprehensive income (loss), net of tax	(24.7)							(24.7)
Share repurchase program	(263.3)								(263.3)
Dividends declared	(92.0)						(92.0)
Ending balance at Jun. 30, 2024	13,389.0	0.0	2.1	100.8	352.3	7,119.4	7,932.4	(1,217.3)	(1,110.1)	209.4
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares					(4.2)	4.2
Shares issued under equity compensation plan	(15.9)		0.1			(16.0)
Amortization of share-based compensation	18.9					18.9
Purchase of noncontrolling interest	(0.2)					(0.1)				(0.1)
Net income (loss) including noncontrolling interests	557.1						549.7			7.4
Other comprehensive income (loss), net of tax	296.5
Other comprehensive income (loss), net of tax	296.0							295.5		0.5
Share repurchase program	(309.6)								(309.6)
Distributions and dividends to noncontrolling interests	(4.0)									(4.0)
Dividends declared	(190.2)						(190.2)
Ending balance at Jun. 30, 2025	13,636.3	0.0	2.2	100.8	266.9	7,230.6	8,597.5	(1,066.9)	(1,690.4)	195.6
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares					(0.6)	0.6
Shares issued under equity compensation plan	0.1					0.1
Amortization of share-based compensation	7.0					7.0
Net income (loss) including noncontrolling interests	430.3						428.7			1.6
Other comprehensive income (loss), net of tax	259.2
Other comprehensive income (loss), net of tax	258.8							258.5		0.3
Share repurchase program	(249.7)								(249.7)
Distributions and dividends to noncontrolling interests	(2.0)									(2.0)
Dividends declared	(94.2)						(94.2)
Ending balance at Jun. 30, 2025	$ 13,636.3	$ 0.0	$ 2.2	$ 100.8	$ 266.9	$ 7,230.6	$ 8,597.5	$ (1,066.9)	$ (1,690.4)	$ 195.6

[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.