Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Reportable Segment Information

The following tables provide information on revenues from external customers, segment income of our reportable segments, floorplan interest expense, depreciation and amortization, total assets, and capital expenditures.

	Year Ended December 31, 2021
	Domestic		Import		Premium Luxury		Corporate and other		Total
Revenues from external customers	$	7,959.9	$	7,798.5	$	9,229.9	$	855.7	$	25,844.0
Floorplan interest expense	$	7.9	$	5.1	$	8.8	$	3.9	$	25.7
Depreciation and amortization	$	39.3	$	33.9	$	64.8	$	55.3	$	193.3
Segment income (loss)(1)	$	595.8	$	714.7	$	837.4	$	(270.8)	$	1,877.1
Capital expenditures	$	15.5	$	27.1	$	80.0	$	109.3	$	231.9
Segment assets	$	1,758.5	$	1,424.2	$	2,668.6	$	3,092.3	$	8,943.6

	Year Ended December 31, 2020
	Domestic		Import		Premium Luxury		Corporate and other		Total
Revenues from external customers	$	6,490.6	$	5,988.0	$	7,202.8	$	708.6	$	20,390.0
Floorplan interest expense	$	23.8	$	12.9	$	21.8	$	5.3	$	63.8
Depreciation and amortization	$	39.8	$	33.6	$	60.5	$	65.0	$	198.9
Segment income (loss)(1)	$	355.2	$	386.4	$	478.2	$	(720.4)	$	499.4
Capital expenditures	$	17.9	$	25.7	$	51.6	$	42.0	$	137.2
Segment assets	$	2,130.0	$	1,764.7	$	2,752.5	$	3,240.0	$	9,887.2

	Year Ended December 31, 2019
	Domestic		Import		Premium Luxury		Corporate and other		Total
Revenues from external customers	$	6,671.4	$	6,468.7	$	7,434.8	$	760.8	$	21,335.7
Floorplan interest expense	$	51.8	$	30.7	$	47.3	$	8.6	$	138.4
Depreciation and amortization	$	37.2	$	33.4	$	53.5	$	56.4	$	180.5
Segment income (loss)(1)	$	257.6	$	318.6	$	381.1	$	(272.1)	$	685.2
Capital expenditures	$	38.6	$	23.2	$	145.3	$	50.3	$	257.4
Segment assets	$	2,483.6	$	1,842.1	$	3,150.5	$	3,067.1	$	10,543.3
(1) Segment income represents income for each of our reportable segments and is defined as operating income less floorplan interest expense.

Reconciliation of Reportable Segment Revenue to Total Consolidated Revenue

The following is a reconciliation of the total of the reportable segments’ revenue and segment income to our consolidated revenue and income from continuing operations before income taxes, respectively.

	Years Ended December 31,
	2021		2020		2019
Total external revenues for reportable segments	$	24,988.3	$	19,681.4	$	20,574.9
Corporate and other revenues	855.7		708.6		760.8
Total consolidated revenues	$	25,844.0	$	20,390.0	$	21,335.7

Reconciliation of Reportable Segment Income to Income from Continuing Operations Before Income Taxes

	Years Ended December 31,
	2021		2020		2019
Total segment income for reportable segments	$	2,147.9	$	1,219.8	$	957.3
Corporate and other	(270.8)		(720.4)		(272.1)
Other interest expense	(93.0)		(93.7)		(106.7)
Other income, net	24.3		144.4		34.1
Income from continuing operations before income taxes	$	1,808.4	$	550.1	$	612.6