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, 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
Beginning balance at Dec. 31, 2022	12,915.2	0.0	2.1	102.2	413.3	7,006.4	6,894.1	(1,205.5)	(522.9)	225.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares					(32.6)	32.6
Shares issued under equity compensation plan	0.2					0.2
Amortization of share-based compensation	20.3					20.3
Net income (loss) including noncontrolling interests	419.3						414.9			4.4
Other comprehensive income (loss), net of tax	112.9							112.1		0.8
Share repurchase program	(26.7)								(26.7)
Contributions from noncontrolling interests	2.4									2.4
Distributions and dividends to noncontrolling interests	(7.0)									(7.0)
Dividends declared	(179.7)						(179.7)
Ending balance at Jun. 30, 2023	13,256.9	0.0	2.1	102.2	380.7	7,059.5	7,129.3	(1,093.4)	(549.6)	226.1
Beginning balance at Mar. 31, 2023	12,919.0	0.0	2.1	102.2	397.7	7,025.6	6,877.0	(1,170.6)	(537.5)	222.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares					(17.0)	17.0
Shares issued under equity compensation plan	6.4					6.4
Amortization of share-based compensation	10.5					10.5
Net income (loss) including noncontrolling interests	346.1						342.4			3.7
Other comprehensive income (loss), net of tax	77.7							77.2		0.5
Share repurchase program	(12.1)								(12.1)
Contributions from noncontrolling interests	2.4									2.4
Distributions and dividends to noncontrolling interests	(3.0)									(3.0)
Dividends declared	(90.1)						(90.1)
Ending balance at Jun. 30, 2023	$ 13,256.9	$ 0.0	$ 2.1	$ 102.2	$ 380.7	$ 7,059.5	$ 7,129.3	$ (1,093.4)	$ (549.6)	$ 226.1