CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating Activities:
Net income	$ 495.9	$ 459.1
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	82.0	76.4
Earnings of equity method investments, net of distributions	(70.2)	(71.1)
Deferred income taxes	(43.9)	(2.0)
Stock-based compensation	16.9	15.3
Gain on sale of dealership	(52.3)	0.0
Changes in operating assets and liabilities:
Accounts receivable	(3.4)	101.2
Inventories	(6.4)	(305.6)
Other current assets	(14.8)	(44.2)
Floor plan notes payable	5.7	334.4
Accounts payable and accrued expenses	44.8	133.4
Other	18.1	(5.8)
Net cash provided by operating activities	472.4	691.1
Investing Activities:
Purchases of property, equipment, and improvements	(147.4)	(201.7)
Proceeds from sale of dealerships	79.2	0.0
Proceeds from sale of property and equipment	20.5	0.0
Proceeds from sale of equity method investment	16.0	0.0
Acquisitions net, including repayment of sellers' floor plan notes payable of $0.0 and $101.9, respectively	0.0	(440.8)
Other	(3.2)	(8.8)
Net cash used in investing activities	(34.9)	(651.3)
Financing Activities:
Proceeds from borrowings under revolving U.S. credit agreement and mortgage facilities	2,354.5	1,829.2
Repayments under revolving U.S. credit agreement and mortgage facilities	(2,450.1)	(1,760.6)
Net cash (repayments) borrowings of other debt	(15.0)	68.0
Net borrowings of floor plan notes payable — non-trade	48.7	51.6
Repurchases of common stock	(111.2)	(58.1)
Payments of tax withholding for stock-based compensation	(22.1)	(18.3)
Dividends	(165.4)	(123.0)
Payment of debt issuance costs	(0.6)	(0.7)
Other	0.0	(8.2)
Net cash used in financing activities	(361.2)	(20.1)
Effect of exchange rate changes on cash and cash equivalents	6.6	(1.0)
Net change in cash and cash equivalents	82.9	18.7
Cash and cash equivalents, beginning of period	72.4	96.4
Cash and cash equivalents, end of period	155.3	115.1
Cash paid for:
Interest	131.6	127.4
Income taxes	$ 181.3	$ 161.3