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]
Exchange of shares				(0.1)		0.1
Shares issued under equity compensation plan	0.6					0.6
Amortization of share-based compensation	24.7					24.7
Purchase of noncontrolling interest	(0.1)					0.3				(0.4)
Net income (loss) including noncontrolling interests	926.1						925.7			0.4
Other comprehensive income (loss), net of tax	32.8							33.3		(0.5)
Contributions from noncontrolling interests	2.5									2.5
Distributions and dividends to noncontrolling interests	(11.3)									(11.3)
Dividends declared	(74.1)						(74.1)
Ending balance at Sep. 30, 2021	13,522.5	0.0	2.1	102.2	417.8	6,963.5	7,395.8	(1,134.5)	(471.4)	247.0
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares				(0.1)		0.1
Amortization of share-based compensation	8.2					8.2
Net income (loss) including noncontrolling interests	453.8						453.0			0.8
Other comprehensive income (loss), net of tax	(97.4)							(96.4)		(1.0)
Contributions from noncontrolling interests	0.8									0.8
Distributions and dividends to noncontrolling interests	(5.2)									(5.2)
Dividends declared	(74.1)						(74.1)
Ending balance at Sep. 30, 2021	13,522.5	0.0	2.1	102.2	417.8	6,963.5	7,395.8	(1,134.5)	(471.4)	247.0
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	(3.4)					(3.4)
Amortization of share-based compensation	25.7					25.7
Purchase of noncontrolling interest	(1.4)					0.3				(1.7)
Net income (loss) including noncontrolling interests	403.3						415.2			(11.9)
Other comprehensive income (loss), net of tax	(400.5)							(396.5)		(4.0)
Share repurchase program	(38.8)								(38.8)
Contributions from noncontrolling interests	8.1									8.1
Distributions and dividends to noncontrolling interests	(11.3)									(11.3)
Dividends declared	(249.3)						(249.3)
Ending balance at Sep. 30, 2022	13,396.5	0.0	2.1	102.2	417.2	6,994.1	7,567.4	(1,402.5)	(510.2)	226.2
Beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	1.0					1.0
Amortization of share-based compensation	8.8					8.8
Purchase of noncontrolling interest	0.1					0.2				(0.1)
Net income (loss) including noncontrolling interests	218.1						216.4			1.7
Other comprehensive income (loss), net of tax	(335.5)							(333.5)		(2.0)
Share repurchase program	(12.6)								(12.6)
Contributions from noncontrolling interests	0.8									0.8
Distributions and dividends to noncontrolling interests	(4.2)									(4.2)
Dividends declared	(82.8)						(82.8)
Ending balance at Sep. 30, 2022	$ 13,396.5	$ 0.0	$ 2.1	$ 102.2	$ 417.2	$ 6,994.1	$ 7,567.4	$ (1,402.5)	$ (510.2)	$ 226.2