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 interest
Beginning balance at Dec. 31, 2020	$ 12,621.3	$ 0.0	$ 2.1	$ 102.3	$ 417.8	$ 6,937.8	$ 6,544.2	$ (1,167.8)	$ (471.4)	$ 256.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	1.0					1.0
Amortization of share-based compensation	8.3					8.3
Purchase of noncontrolling interest	(0.2)									(0.2)
Net income (loss) including noncontrolling interests	82.0						84.1			(2.1)
Other comprehensive income (loss), net of tax	122.5							122.4		0.1
Distributions and dividends to noncontrolling interests	(0.9)									(0.9)
Ending balance at Mar. 31, 2021	12,834.0	0.0	2.1	102.3	417.8	6,947.1	6,628.3	(1,045.4)	(471.4)	253.2
Beginning balance at Dec. 31, 2021	13,664.1	0.0	2.1	102.2	417.8	6,970.9	7,401.5	(1,006.0)	(471.4)	247.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares					(0.6)	0.6
Shares issued under equity compensation plan	(4.4)					(4.4)
Amortization of share-based compensation	8.5					8.5
Net income (loss) including noncontrolling interests	137.3						151.5			(14.2)
Other comprehensive income (loss), net of tax	56.0							56.4		(0.4)
Share repurchase program	(14.1)								(14.1)
Contributions from noncontrolling interests	7.3									7.3
Distributions and dividends to noncontrolling interests	(1.0)									(1.0)
Dividends declared	(83.2)						(83.2)
Ending balance at Mar. 31, 2022	$ 13,770.5	$ 0.0	$ 2.1	$ 102.2	$ 417.2	$ 6,975.6	$ 7,469.8	$ (949.6)	$ (485.5)	$ 238.7