Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities:
Net income	$ 206.0	$ 319.8	$ 151.9
Adjustments for items not affecting cash:
Depreciation and amortization	352.2	97.2	87.9
Share-based payments expense	55.8	41.7	31.3
Deferred income tax (benefit) expense	(65.8)	(0.3)	3.9
Unrealized foreign exchange loss (gain)	6.6	(6.5)	(0.1)
Gain on disposition of property, plant and equipment	(4.9)	(170.8)	(1.4)
Allowance for expected credit losses	5.9	0.0	0.0
Loss on redemption of Notes	3.3	4.8	0.0
Gain on remeasurement of investment upon acquisition	(1.4)	0.0	0.0
Amortization of debt issuance costs	10.1	3.9	2.9
Amortization of right-of-use assets	109.9	19.4	12.8
Other, net	10.0	2.7	4.0
Net changes in operating assets and liabilities	(143.7)	151.2	24.4
Net cash provided by operating activities	544.0	463.1	317.6
Investing activities:
Property, plant and equipment additions	(227.9)	(32.0)	(9.8)
Proceeds on disposition of property, plant and equipment	32.6	165.5	1.9
Intangible asset additions	(118.3)	(40.0)	(33.7)
Repayment of loans receivable	4.0	5.5	1.1
Issuance of loans receivable	(18.8)	(22.0)	(2.6)
Other	(1.3)	0.3	0.0
Net cash provided by (used in) investing activities	(3,108.3)	77.2	(214.1)
Financing activities:
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs	496.9	0.0	0.0
Dividends paid to common stockholders	(298.0)	(115.2)	(103.8)
Acquisition of remaining interest in NCI and dividends paid to NCI	0.0	0.0	(5.7)
Dividends paid to Series A Senior Preferred shareholders	(30.4)	0.0	0.0
Proceeds from exercise of options and share option plans	43.7	5.9	16.3
Payment of withholding taxes on issuance of shares	(15.9)	(4.0)	(9.3)
Net increase (decrease) in short-term debt	(15.5)	0.8	(21.6)
Proceeds from long-term debt	3,175.0	0.0	1,107.0
Repayment of long-term debt	(654.4)	(1,131.0)	(5.3)
Payment of debt issue costs	(41.7)	(4.3)	(5.7)
Repayment of finance lease and equipment financing obligations	(19.2)	(10.3)	(11.0)
Proceeds of equipment financing obligations	37.6	0.0	0.0
Payment of contingent consideration	(1.9)	0.0	0.0
Net cash provided by (used in) financing activities	2,676.2	(1,258.1)	960.9
Effect of changes in foreign currency rates on cash, cash equivalents, and restricted cash	10.1	(18.8)	(8.8)
(Decrease) Increase	122.0	(736.6)	1,055.6
Beginning of period	625.9	1,362.5	306.9
Cash, cash equivalents, and restricted cash, end of period	747.9	625.9	1,362.5
IAA
Investing activities:
Acquisitions, net of cash acquired	(2,753.9)	0.0	0.0
VeriTread
Investing activities:
Acquisitions, net of cash acquired	(24.7)	0.0	0.0
SmartEquip
Investing activities:
Acquisitions, net of cash acquired	$ 0.0	$ (0.1)	$ (171.0)