Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Reportable Segment Revenue

In the following tables of financial data, revenue and segment income of our reportable segments are reconciled to consolidated revenue and consolidated income from continuing operations before income taxes, respectively.

	Years Ended December 31,
	2017		2016		2015
Revenues:
Domestic	$	7,452.8	$	7,810.0	$	7,069.8
Import	6,873.4		6,886.1		7,037.2
Premium Luxury	6,832.7		6,665.3		6,607.8
Total	21,158.9		21,361.4		20,714.8
Corporate and other	375.7		247.6		147.2
Total consolidated revenue	$	21,534.6	$	21,609.0	$	20,862.0

Reportable Segment Income

	Years Ended December 31,
	2017			2016			2015
Segment income(1):
Domestic	$	257.1		$	311.1		$	336.9
Import	303.1			296.8			311.4
Premium Luxury	348.8			350.2			376.2
Total	909.0			958.1			1,024.5
Corporate and other	(162.6		)	(145.1		)	(209.7		)
Other interest expense	(120.2		)	(115.5		)	(90.9		)
Interest income	1.0			1.1			0.1
Other income (loss), net	9.3			3.7			(1.3		)
Income from continuing operations before income taxes	$	636.5		$	702.3		$	722.7

⁽¹⁾  Segment income represents income for each of our reportable segments and is defined as operating income less floorplan interest expense.

Reportable Segment Floorplan Interest Expense, Depreciation and Amortization, and Capital Expenditures

	Years Ended December 31,
	2017		2016		2015
Floorplan interest expense:
Domestic	$	40.9	$	33.7	$	24.1
Import	23.2		17.4		15.0
Premium Luxury	28.4		22.7		18.0
Corporate and other	4.5		2.7		1.2
Total floorplan interest expense	$	97.0	$	76.5	$	58.3
	Years Ended December 31,
	2017		2016		2015
Depreciation and amortization:
Domestic	$	38.2	$	37.5	$	31.0
Import	34.3		35.4		32.9
Premium Luxury	44.5		40.7		35.0
Corporate and other	41.6		29.8		28.5
Total depreciation and amortization	$	158.6	$	143.4	$	127.4

	Years Ended December 31,
	2017		2016		2015
Capital expenditures:
Domestic	$	36.2	$	62.5	$	61.4
Import	32.8		28.0		34.0
Premium Luxury	101.7		95.6		101.9
Corporate and other	162.2		67.1		69.6
Total capital expenditures	$	332.9	$	253.2	$	266.9

Reportable Segment Assets

	Years Ended December 31,
	2017		2016		2015
Assets:
Domestic	$	2,563.9	$	2,742.8	$	2,573.9
Import	1,992.6		2,065.5		2,145.2
Premium Luxury	2,716.8		2,603.4		2,554.6
Corporate and other:
Goodwill	1,515.0		1,511.3		1,394.5
Franchise rights	572.2		589.4		432.4
Other Corporate and other assets	911.0		547.6		447.6
Total assets	$	10,271.5	$	10,060.0	$	9,548.2