Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash provided by (used in):
Net income	$ 294,400,000	$ 121,800,000
Adjustments for items not affecting cash:
Depreciation and amortization	329,900,000	246,900,000
Share-based payments expense	45,200,000	39,900,000
Deferred income tax benefit	(44,500,000)	(31,400,000)
Unrealized foreign exchange (gain) loss	(500,000)	5,400,000
Gain on disposition of property, plant and equipment	(3,200,000)	(4,400,000)
Allowance for expected credit losses	5,400,000	0
Loss on redemption of notes	0	3,300,000
Gain on remeasurement of investment upon acquisition	0	(1,400,000)
Amortization of debt issuance costs	9,700,000	7,100,000
Amortization of right-of-use assets	114,700,000	72,900,000
Other, net	16,100,000	7,000,000.0
Net changes in operating assets and liabilities	(19,700,000)	(260,400,000)
Net cash provided by operating activities	747,500,000	206,700,000
Net Cash Provided by (Used in) Investing Activities [Abstract]
Property, plant and equipment additions	(110,800,000)	(153,600,000)
Proceeds on disposition of property, plant and equipment	1,500,000	31,600,000
Intangible asset additions	(83,700,000)	(83,300,000)
Proceeds from repayment of loans receivable	6,300,000	2,300,000
Issuance of loans receivable	(20,800,000)	(18,800,000)
Other	(2,100,000)	(600,000)
Net cash used in investing activities	(209,600,000)	(3,002,300,000)
Financing activities:
Issuance of Series A Senior Preferred Shares and common stock, net of issuance costs	0	496,900,000
Dividends paid to common stockholders	(152,400,000)	(248,700,000)
Dividends paid to Series A Senior Preferred shareholders	(25,600,000)	(21,900,000)
Proceeds from exercise of options and share option plans	57,500,000	15,500,000
Payment of withholding taxes on issuance of shares	(14,600,000)	(14,600,000)
Net increase (decrease) in short-term debt	16,400,000	(23,900,000)
Proceeds from long-term debt	0	3,175,000,000
Repayment of long-term debt	(353,300,000)	(603,300,000)
Payment of debt issue costs	0	(41,700,000)
Repayment of finance lease and equipment financing obligations	(19,700,000)	(13,600,000)
Proceeds from equipment financing obligations	2,000,000.0	11,100,000
Payment of contingent consideration	(1,900,000)	(2,000,000.0)
Net cash (used in) provided by financing activities	(491,600,000)	2,728,800,000
Effect of changes in foreign currency rates on cash, cash equivalents, and restricted cash	(4,100,000)	100,000
Net increase (decrease) in cash, cash equivalents, and restricted cash	42,200,000	(66,700,000)
Cash, cash equivalents, and restricted cash, beginning of period	747,900,000	625,900,000
Cash, cash equivalents, and restricted cash, end of period	790,100,000	559,200,000
IAA acquisition
Net Cash Provided by (Used in) Investing Activities [Abstract]
Acquisitions, net of cash acquired	0	(2,755,200,000)
VeriTread
Net Cash Provided by (Used in) Investing Activities [Abstract]
Acquisitions, net of cash acquired	$ 0	$ (24,700,000)