Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net income	$ 561.2	$ 738.4
Adjustments to reconcile net income to net cash provided by operating activities:
(Income) loss from discontinued operations	(0.9)	0.2
Depreciation and amortization	107.4	98.8
Amortization of debt issuance costs and accretion of debt discounts	4.8	3.0
Stock-based compensation expense	23.4	21.2
Provision for credit losses on auto loans receivable	22.7	0.0
Deferred income tax provision	2.8	3.5
Net gain related to business/property dispositions	(1.1)	(1.0)
Non-cash impairment charges	2.2	1.0
Loss on equity investments	1.3	0.1
Loss (gain) on corporate-owned life insurance asset	(9.1)	20.8
(Increase) decrease, net of effects from business acquisitions and divestitures:
Receivables	20.7	24.3
Inventory	(485.8)	(63.5)
Other assets	(102.5)	(0.9)
Increase (decrease), net of effects from business acquisitions and divestitures:
Vehicle floorplan payable - trade	265.2	71.8
Accounts payable	53.4	(20.8)
Other liabilities	41.6	(1.7)
Net cash provided by continuing operations	507.3	895.2
Net cash used in discontinued operations	(0.3)	(0.2)
Net cash provided by operating activities	507.0	895.0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of property and equipment	(199.0)	(160.3)
Proceeds from the sale of property and equipment	1.8	0.0
Proceeds from the disposal of assets held for sale	2.5	18.0
Cash used in business acquisitions, net of cash acquired	(268.9)	0.0
Originations of auto loans receivable acquired through third-party dealers	(91.8)	0.0
Collections on auto loans receivable acquired through third-party dealers	76.7	0.0
Other	(8.8)	(6.2)
Net cash used in continuing operations	(487.5)	(148.5)
Net cash used in discontinued operations	0.0	0.0
Net cash used in investing activities	(487.5)	(148.5)
CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Repurchases of common stock	(523.2)	(784.5)
Proceeds from 3.85% Senior Notes due 2032	0.0	698.8
Net proceeds from (payments of) commercial paper	415.0	(340.0)
Proceeds from non-recourse debt	63.9	0.0
Payments of non-recourse debt	(126.9)	0.0
Payment of debt issuance costs	0.0	(6.6)
Net proceeds from (payments of) vehicle floorplan payable - non-trade	171.4	(5.5)
Payments of other debt obligations	(6.2)	(5.9)
Proceeds from the exercise of stock options	1.5	2.6
Payments of tax withholdings for stock-based awards	(25.1)	(29.4)
Net cash used in continuing operations	(29.6)	(470.5)
Net cash used in discontinued operations	0.0	0.0
Net cash used in financing activities	(29.6)	(470.5)
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(10.1)	276.0
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH at beginning of period	95.4	60.6
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH at end of period	$ 85.3	$ 336.6