Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Summarized financial information concerning our reportable segments is shown in the following table.

	Three months ended March 31,
	2018			2017
Total revenue:
IAN	$	1,685.5		$	1,567.8
CMG	483.6			496.0
Total	$	2,169.1		$	2,063.8
Net revenue:
IAN	$	1,481.3		$	1,391.1
CMG	292.7			284.2
Total	$	1,774.0		$	1,675.3
Segment operating income (loss):
IAN	$	57.0		$	50.1
CMG	19.4			22.1
Corporate and other	(37.6		)	(37.5		)
Total	38.8			34.7
Interest expense, net	(15.9		)	(15.7		)
Other (expense) income, net	(24.4		)	0.8
(Loss) income before income taxes	$	(1.5	)	$	19.8
Depreciation and amortization
IAN	$	37.4		$	32.7
CMG	6.1			6.0
Corporate and other	2.5			2.3
Total	$	46.0		$	41.0
Capital expenditures:
IAN	$	15.8		$	17.2
CMG	1.1			2.7
Corporate and other	5.9			4.9
Total	$	22.8		$	24.8
	March 31, 2018			December 31, 2017
Total assets:
IAN	$	10,744.3		$	10,978.0
CMG	1,476.5			1,427.4
Corporate and other	19.3			299.3
Total	$	12,240.1		$	12,704.7