CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 492.9	$ 594.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	68.6	66.9
Change in operating lease assets	19.1	22.6
Deferred income taxes	8.2	17.4
Asset impairments	7.7	7.1
Stock-based compensation	15.5	21.2
Amortization of debt discount and issuance costs	2.2	2.3
Gain on disposition of assets	(20.1)	(40.8)
Unrealized gain on derivative instruments	(4.9)	0.0
Other	(1.8)	1.3
Changes in assets and liabilities, net of acquisitions and dispositions:
Accounts payable and accrued expenses	79.3	51.0
Accounts and notes receivable	(23.5)	(7.3)
Inventories	(314.3)	(156.6)
Contracts-in-transit and vehicle receivables	(20.6)	(6.6)
Prepaid expenses and other assets	(7.2)	6.4
Floorplan notes payable — manufacturer affiliates	110.3	(23.9)
Deferred revenues	(0.6)	(0.3)
Operating lease liabilities	(18.3)	(21.9)
Net cash provided by operating activities	392.5	533.4
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for acquisitions, net, including repayment of sellers’ floorplan notes payable of $64.9 and $7.7, respectively	(363.7)	(424.2)
Proceeds from disposition of franchises, property and equipment	153.9	132.6
Purchases of property and equipment	(137.4)	(93.3)
Proceeds from sale of discontinued operations, net	0.0	59.4
Other	1.3	(0.5)
Net cash used in investing activities	(345.8)	(325.9)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facility — floorplan line and other	8,235.6	7,548.3
Repayments on credit facility — floorplan line and other	(8,109.7)	(7,294.2)
Borrowings on credit facility — acquisition line	200.0	286.0
Repayments on credit facility — acquisition line	(178.2)	(411.3)
Debt issuance costs	(0.3)	(4.6)
Borrowings on other debt	136.4	296.0
Principal payments on other debt	(183.2)	(246.5)
Proceeds from employee stock purchase plan	16.6	15.9
Payments of tax withholding for stock-based compensation	(9.4)	(9.1)
Repurchases of common stock, amounts based on settlement date	(130.5)	(359.5)
Dividends paid	(19.0)	(18.1)
Other	0.0	(1.2)
Net cash used in financing activities	(41.7)	(198.4)
Effect of exchange rate changes on cash	0.1	(7.2)
Net increase in cash and cash equivalents	5.1	1.9
CASH AND CASH EQUIVALENTS, beginning of period	47.9	18.7
CASH AND CASH EQUIVALENTS, end of period	$ 52.9	$ 20.5