Consolidated Statements of Changes in Temporary Equity and Stockholders' Equity - USD ($) $ in Millions	Total	Senior A Senior Preferred Shares	Redeemable non- controlling interest	Cumulative 5.5% Dividends on Series A Senior Preferred Shares	Common stock	Additional paid-In capital ("APIC")	Retained earnings	Retained earnings Senior A Senior Preferred Shares	Retained earnings Cumulative 5.5% Dividends on Series A Senior Preferred Shares	Accumulated other comprehensive loss	Non- controlling interest ("NCI")
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss)	$ 0.0
Balance (in shares) at Dec. 31, 2020					109,876,428
Balance at Dec. 31, 2020	1,012.4				$ 200.4	$ 49.2	$ 791.9			$ (34.3)	$ 5.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	151.9						151.9
Other comprehensive (loss) income	(21.7)									(21.7)
Controlling interests	130.2						151.9			(21.7)
Stock option exercises (in shares)					495,021
Stock option exercises	16.2				$ 20.0	(3.8)
Issuance of common stock related to vesting of share units (in shares)					238,139
Issuance of common stock related to vesting of share units	(9.5)				$ 2.3	(11.8)
Acquisition of remaining interest in NCI	(5.7)					(1.2)	0.1				(4.6)
Issuance of common stock related to business combinations (in shares)					63,971
Forfeiture of common stock related to business combinations (in shares)					(55,510)
Forfeiture of common stock related to business combinations	(0.1)					(0.1)
Share-based continuing employment costs related to business combinations	10.9				$ 4.8	6.1
Share-based payments expense	20.6					20.6
Equity-classified share units dividend equivalents	0.0					0.5	(0.5)
Dividends paid to common stockholders	(103.9)						(103.8)				(0.1)
Balance (in shares) at Dec. 31, 2021					110,618,049
Balance at Dec. 31, 2021	1,071.1				$ 227.5	59.5	839.6			(56.0)	0.5
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss)	$ 0.0
Temporary equity, ending balance (in shares) at Dec. 31, 2022	0	0
Ending balance at Dec. 31, 2022		$ 0.0	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 319.7						319.7
Other comprehensive (loss) income	(29.1)									(29.1)
Controlling interests	290.6						319.7			(29.1)
Stock option exercises (in shares)					159,920
Stock option exercises	5.8				$ 7.2	(1.4)
Issuance of common stock related to vesting of share units (in shares)					103,394
Issuance of common stock related to vesting of share units	(3.8)				$ 3.0	(6.8)
Share-based continuing employment costs related to business combinations	7.5				$ 8.6	(1.1)
Share-based payments expense	34.2					34.2
Equity-classified share units dividend equivalents	0.0					0.9	(0.9)
Dividends paid to common stockholders	$ (115.2)
Balance (in shares) at Dec. 31, 2022	110,881,363				110,881,363
Balance at Dec. 31, 2022	$ 1,290.1				$ 246.3	85.3	1,043.2			(85.1)	0.5
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income (loss)			(0.5)
Net income (loss)	$ 0.5		(0.5)
NCI acquired in business combination			8.9
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs (in shares)		485,000,000
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs		$ 482.0
Temporary equity, ending balance (in shares) at Dec. 31, 2023	485,000,000	485,000,000
Ending balance at Dec. 31, 2023		$ 482.0	$ 8.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 206.5						206.5
Other comprehensive (loss) income	41.1									41.1
Controlling interests	247.6						206.5			41.1
Stock option exercises (in shares)					723,443
Stock option exercises	34.5				$ 42.9	(8.4)
Issuance of common stock related to vesting of share units (in shares)					467,747
Issuance of common stock related to vesting of share units	(19.0)				$ 17.4	(36.4)
Issuance of common stock related to ESPP purchase (in shares)					180,503
Issuance of common stock related to ESPP	9.2				$ 11.4	(2.2)
Issuance of common stock related to business combination (in shares)					70,339,723
Issuance of common stock related to business combination	3,712.9				$ 3,712.9
Share-based continuing employment costs related to business combinations	3.0				$ 8.3	(5.3)
Replacement of share-based awards in business combination	13.1					13.1
Share-based payments expense	40.3					40.3
Equity-classified share units dividend equivalents	0.0					1.6	(1.6)
NCI acquired in business combination	1.8										1.8
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs (in shares)					251,163
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs	15.0				$ 15.0
Participating dividends on Series A Senior Preferred Shares		$ (7.3)		$ (24.3)				$ (7.3)	$ (24.3)
Dividends paid to common stockholders	$ (298.0)
Balance (in shares) at Dec. 31, 2023	182,843,942				182,843,942
Balance at Dec. 31, 2023	$ 5,019.0				$ 4,054.2	$ 88.0	$ 918.5			$ (44.0)	$ 2.3