CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Activities:
Net income	$ 245.0	$ 216.2
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	39.9	37.8
Earnings of equity method investments	(33.3)	(33.3)
Deferred income taxes	(23.2)	14.6
Stock-based compensation	8.0	7.5
Gain on sale of dealership	(52.3)	0.0
Changes in operating assets and liabilities:
Accounts receivable	(188.9)	75.9
Inventories	191.7	(77.2)
Other current assets	(16.1)	(33.8)
Floor plan notes payable	(73.0)	134.8
Accounts payable and accrued expenses	187.4	130.5
Other	(2.5)	(17.0)
Net cash provided by operating activities	282.7	456.0
Investing Activities:
Purchases of property, equipment, and improvements	(76.6)	(102.5)
Proceeds from sale of dealerships	77.8	0.0
Proceeds from sale of property and equipment	4.0	0.0
Acquisitions net, including repayment of sellers' floor plan notes payable of $0.0 and $83.1, respectively	0.0	(243.6)
Other	(1.7)	(6.3)
Net cash provided by (used in) investing activities	3.5	(352.4)
Financing Activities:
Proceeds from borrowings under revolving U.S. credit agreement and mortgage facilities	1,098.6	668.7
Repayments under revolving U.S. credit agreement and mortgage facilities	(1,143.1)	(700.2)
Net cash (repayments) borrowings of other debt	(47.5)	80.2
Net repayments of floor plan notes payable — non-trade	(27.6)	(30.7)
Repurchases of common stock	(39.9)	(32.9)
Payments of tax withholding for stock-based compensation	(0.1)	0.0
Dividends	(81.8)	(58.6)
Payment of debt issuance costs	(0.3)	(0.5)
Other	0.0	(8.1)
Net cash used in financing activities	(241.7)	(82.1)
Effect of exchange rate changes on cash and cash equivalents	1.5	(1.0)
Net change in cash and cash equivalents	46.0	20.5
Cash and cash equivalents, beginning of period	72.4	96.4
Cash and cash equivalents, end of period	118.4	116.9
Cash paid for:
Interest	69.2	68.6
Income taxes	$ 23.5	$ 22.5