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	0.6					0.6
Amortization of share-based compensation	16.5					16.5
Purchase of noncontrolling interest	(0.1)					0.3				(0.4)
Net income (loss) including noncontrolling interests	472.3						472.7			(0.4)
Other comprehensive income (loss), net of tax	130.2							129.7		0.5
Contributions from noncontrolling interests	1.7									1.7
Distributions and dividends to noncontrolling interests	(6.1)									(6.1)
Ending balance at Jun. 30, 2021	13,236.4	0.0	2.1	102.3	417.8	6,955.2	7,016.9	(1,038.1)	(471.4)	251.6
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	(0.4)					(0.4)
Amortization of share-based compensation	8.2					8.2
Purchase of noncontrolling interest	0.1					0.3				(0.2)
Net income (loss) including noncontrolling interests	390.3						388.6			1.7
Other comprehensive income (loss), net of tax	7.7							7.3		0.4
Contributions from noncontrolling interests	1.7									1.7
Distributions and dividends to noncontrolling interests	(5.2)									(5.2)
Ending balance at Jun. 30, 2021	13,236.4	0.0	2.1	102.3	417.8	6,955.2	7,016.9	(1,038.1)	(471.4)	251.6
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	16.9					16.9
Purchase of noncontrolling interest	(1.5)					0.1				(1.6)
Net income (loss) including noncontrolling interests	185.2						198.8			(13.6)
Other comprehensive income (loss), net of tax	(65.0)							(63.0)		(2.0)
Share repurchase program	(26.2)								(26.2)
Contributions from noncontrolling interests	7.3									7.3
Distributions and dividends to noncontrolling interests	(7.1)									(7.1)
Dividends declared	(166.5)						(166.5)
Ending balance at Jun. 30, 2022	13,602.8	0.0	2.1	102.2	417.2	6,984.1	7,433.8	(1,069.0)	(497.6)	230.0
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of share-based compensation	8.4					8.4
Purchase of noncontrolling interest	(1.5)					0.1				(1.6)
Net income (loss) including noncontrolling interests	47.9						47.3			0.6
Other comprehensive income (loss), net of tax	(121.0)							(119.4)		(1.6)
Share repurchase program	(12.1)								(12.1)
Distributions and dividends to noncontrolling interests	(6.1)									(6.1)
Dividends declared	(83.3)						(83.3)
Ending balance at Jun. 30, 2022	$ 13,602.8	$ 0.0	$ 2.1	$ 102.2	$ 417.2	$ 6,984.1	$ 7,433.8	$ (1,069.0)	$ (497.6)	$ 230.0