CONSOLIDATED STATEMENTS OF CHANGES IN OWNERS' EQUITY AND SERIES A PREFERRED STOCK - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Shares [Member]	Noncontrolling Interests [Member]	Series A Preferred Stock [Member]
Balance at Dec. 31, 2021	$ 5,178.7	$ 0.2	$ 4,268.9	$ (1,822.3)	$ (230.9)	$ (204.1)	$ 3,166.9
Balance (in shares) at Dec. 31, 2021		228,221,000				7,884,000
Series A Preferred Stock at Dec. 31, 2021								$ 749.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation on equity grants	13.5		13.5
Dividend equivalent rights	(1.7)		(1.7)
Shares issued under compensation program (in shares)		1,095,000
Shares tendered for tax withholding obligations	(22.5)					$ (22.5)
Shares tendered for tax withholding obligations (in shares)		(397,000)				397,000
Repurchases of common stock	$ (49.7)					$ (49.7)
Repurchases of common stock (in shares)	(737,799)	(738,000)				738,000
Series A Preferred Stock dividends
Preferred stock dividends	$ (21.8)			(21.8)
Dividends in excess of retained earnings			(21.8)	21.8
Common stock dividends
Common stock dividends	(80.0)			(80.0)
Dividends in excess of retained earnings			(80.0)	80.0
Distributions to noncontrolling interests	(72.2)						(72.2)
Contributions from noncontrolling interests	2.9						2.9
Repurchase of noncontrolling interests, net of tax	(911.0)		(53.1)				(857.9)
Other comprehensive income (loss)	(187.5)				(187.5)
Net income (loss)	168.6			88.0			80.6
Balance at Mar. 31, 2022	4,017.3	$ 0.2	4,125.8	(1,734.3)	(418.4)	$ (276.3)	2,320.3
Balance (in shares) at Mar. 31, 2022		228,181,000				9,019,000
Series A Preferred Stock at Mar. 31, 2022								749.7
Balance at Dec. 31, 2022	4,982.2	$ 0.2	3,702.3	(626.8)	54.7	$ (464.7)	2,316.5
Balance (in shares) at Dec. 31, 2022		226,042,000				11,897,000
Series A Preferred Stock at Dec. 31, 2022								0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation on equity grants	15.0		15.0
Dividend equivalent rights	(1.3)		(1.3)
Shares issued under compensation program (in shares)		1,267,000
Shares tendered for tax withholding obligations	(33.8)					$ (33.8)
Shares tendered for tax withholding obligations (in shares)		(449,000)				449,000
Repurchases of common stock	$ (52.0)					$ (52.0)
Repurchases of common stock (in shares)	(724,140)	(724,000)				724,000
Common stock dividends
Common stock dividends	$ (79.3)			(79.3)
Dividends in excess of retained earnings			(79.3)	79.3
Distributions to noncontrolling interests	(56.1)						(56.1)
Contributions from noncontrolling interests	0.2						0.2
Repurchase of noncontrolling interests, net of tax	(948.0)		(490.7)				(457.3)
Other comprehensive income (loss)	30.1				30.1
Net income (loss)	555.2			497.0			58.2
Balance at Mar. 31, 2023	$ 4,412.2	$ 0.2	$ 3,146.0	$ (129.8)	$ 84.8	$ (550.5)	$ 1,861.5
Balance (in shares) at Mar. 31, 2023		226,136,000				13,070,000
Series A Preferred Stock at Mar. 31, 2023								$ 0.0