CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common stock Common Class A	Common stock Common Class B	Common stock Class A exchangeable shares	Common stock Class B exchangeable shares	Paid-in capital	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)	Common stock held in treasury, Class B	Noncontrolling interests
Beginning balance at Dec. 31, 2018	$ 13,735.8		$ 0.0	$ 2.0	$ 103.2	$ 557.6	$ 6,773.1	$ 7,692.9		$ (1,150.0)	$ (471.4)	$ 228.4
Beginning balance (ASU 2016-02) at Dec. 31, 2018		$ 32.0							$ 32.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares	0.0				(0.7)	0.2	0.5
Shares issued under equity compensation plan	(8.3)			0.1			(8.4)
Amortization of share-based compensation	8.3						8.3
Acquisition of business and purchase of noncontrolling interest	0.6						0.1					0.5
Deconsolidation of VIE	(1.7)											(1.7)
Net income (loss) including noncontrolling interests	246.2							241.7				4.5
Other comprehensive income (loss), net of tax	63.2									62.6		0.6
Reclassification of stranded tax effects	0.0							74.8		(74.8)
Contributions from noncontrolling interests	34.1											34.1
Distributions and dividends to noncontrolling interests	(12.7)											(12.7)
Dividends declared	(424.4)							(424.4)
Ending balance at Dec. 31, 2019	13,673.1		0.0	2.1	102.5	557.8	6,773.6	7,617.0		(1,162.2)	(471.4)	253.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares	0.0				(0.2)	(140.0)	140.2
Shares issued under equity compensation plan	(0.5)						(0.5)
Amortization of share-based compensation	24.2						24.2
Acquisition of business and purchase of noncontrolling interest	(0.2)						0.3					(0.5)
Net income (loss) including noncontrolling interests	(945.7)							(949.0)				3.3
Other comprehensive income (loss), net of tax	(3.4)									(5.6)		2.2
Contributions from noncontrolling interests	16.3											16.3
Distributions and dividends to noncontrolling interests	(18.7)											(18.7)
Dividends declared	(123.8)							(123.8)
Ending 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	0.0				(0.1)		0.1
Shares issued under equity compensation plan	0.6						0.6
Amortization of share-based compensation	32.1						32.1
Acquisition of business and purchase of noncontrolling interest	(0.2)						0.3					(0.5)
Net income (loss) including noncontrolling interests	1,008.5							1,005.7				2.8
Other comprehensive income (loss), net of tax	161.3									161.8		(0.5)
Contributions from noncontrolling interests	3.2											3.2
Distributions and dividends to noncontrolling interests	(14.3)											(14.3)
Dividends declared	(148.4)							(148.4)
Ending 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