Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net income	$ 412.8	$ 206.0	$ 319.8
Adjustments for items not affecting cash:
Depreciation and amortization	444.4	352.2	97.2
Share-based payments expense	62.4	55.8	41.7
Deferred income tax benefit	(69.2)	(65.8)	(0.3)
Unrealized foreign exchange (gain) loss	(0.4)	6.6	(6.5)
Gain on disposition of property, plant and equipment	(3.8)	(4.9)	(170.8)
Allowance for expected credit losses	5.1	5.9	0.0
Loss on redemption of notes	0.0	3.3	4.8
Gain on remeasurement of investment upon acquisition	0.0	(1.4)	0.0
Amortization of debt issuance costs	12.5	10.1	3.9
Amortization of right-of-use assets	154.4	109.9	19.4
Inventory write-downs	14.9	7.0	0.0
Other, net	(1.3)	3.0	2.7
Net changes in operating assets and liabilities	(99.8)	(143.7)	151.2
Net cash provided by operating activities	932.0	544.0	463.1
Investing activities:
Property, plant and equipment additions	(167.4)	(227.9)	(32.0)
Proceeds on disposition of property, plant and equipment	2.6	32.6	165.5
Intangible asset additions	(109.5)	(118.3)	(40.0)
Repayment of loans receivable	8.1	4.0	5.5
Issuance of loans receivable	(24.1)	(18.8)	(22.0)
Other, net	(2.7)	(1.3)	0.3
Net cash (used in) provided by investing activities	(301.6)	(3,108.3)	77.2
Financing activities:
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs	0.0	496.9	0.0
Dividends paid to common stockholders	(206.0)	(298.0)	(115.2)
Dividends paid to Series A Senior Preferred shareholders	(34.2)	(30.4)	0.0
Proceeds from exercise of options and share option plans	75.5	43.7	5.9
Payment of withholding taxes on issuance of shares	(14.8)	(15.9)	(4.0)
Net increase (decrease) in short-term debt	14.5	(15.5)	0.8
Proceeds from long-term debt	0.0	3,175.0	0.0
Repayment of long-term debt	(454.4)	(654.4)	(1,131.0)
Payment of debt issue costs	(0.3)	(41.7)	(4.3)
Repayment of finance lease and equipment financing obligations	(26.5)	(19.2)	(10.3)
Proceeds of equipment financing obligations	2.6	37.6	0.0
Payment of contingent consideration	(1.9)	(1.9)	0.0
Net cash (used in) provided by financing activities	(645.5)	2,676.2	(1,258.1)
Effect of changes in foreign currency rates on cash, cash equivalents, and restricted cash	(24.0)	10.1	(18.8)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(39.1)	122.0	(736.6)
Cash, cash equivalents, and restricted cash, beginning of period	747.9	625.9	1,362.5
Cash, cash equivalents, and restricted cash, end of period	708.8	747.9	625.9
IAA
Investing activities:
Acquisitions, net of cash acquired	0.0	(2,753.9)	0.0
VeriTread
Investing activities:
Acquisitions, net of cash acquired	0.0	(24.7)	0.0
SmartEquip
Investing activities:
Acquisitions, net of cash acquired	0.0	0.0	(0.1)
Boom and Bucket Inc
Investing activities:
Acquisitions, net of cash acquired	$ (8.6)	$ 0.0	$ 0.0