Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment

The following tables present revenues, gross profit, operating income and amortization by segment (in millions):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Apex
Revenues	$	576.9	$	628.5	$	1,206.0	$	1,234.6
Gross profit	170.6		187.8		355.1		363.2
Operating income	66.0		72.9		133.1		133.9
Amortization	5.5		5.5		10.8		11.5
Oxford
Revenues	$	120.2	$	153.2	$	268.9	$	302.8
Gross profit	46.4		62.5		105.7		121.4
Operating income	7.8		11.0		18.9		22.7
Amortization	0.1		1.0		0.3		2.0
ECS
Revenues	$	239.7	$	190.6	$	452.4	$	358.6
Gross profit	43.8		34.9		80.9		64.5
Operating income	16.2		10.9		27.5		17.8
Amortization	7.0		6.6		13.6		13.4
Consolidated
Revenues	$	936.8	$	972.3	$	1,927.3	$	1,896.0
Gross profit	260.8		285.2		541.7		549.1
Operating income(1)	76.0		73.3		146.9		136.0
Amortization	12.6		13.1		24.7		26.9

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Consolidated operating income includes corporate operating expenses, which are not allocated to the segments, consisting of consolidated stock-based compensation expense, compensation for corporate employees, acquisition, integration and strategic planning expenses, public company expenses and depreciation expense for corporate assets.

Disaggregation of Revenue

The following table presents segment revenues by type (in millions):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Apex
Contract —
Assignment	$	483.8	$	533.5	$	1,010.1	$	1,053.3
Consulting	85.3		79.5		174.9		151.9
	569.1		613.0		1,185.0		1,205.2
Permanent placement	7.8		15.5		21.0		29.4
	576.9		628.5		1,206.0		1,234.6
Oxford
Contract —
Assignment	$	96.2	$	117.1	$	211.1	$	234.7
Consulting	11.1		14.3		24.3		26.1
	107.3		131.4		235.4		260.8
Permanent placement	12.9		21.8		33.5		42.0
	120.2		153.2		268.9		302.8
ECS
Firm-fixed-price	$	63.5	$	46.1	$	120.5	$	89.4
Time and materials	81.4		70.8		153.8		132.2
Cost reimbursable	94.8		73.7		178.1		137.0
	239.7		190.6		452.4		358.6
Consolidated	$	936.8	$	972.3	$	1,927.3	$	1,896.0

Schedule of Revenue by Geographical Areas

The Company operates internationally, with operations mainly in the United States. The following table presents revenues within and outside of the United States (in millions):

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2020		%		2019		%		2020		%		2019		%
Revenues:
Domestic	$	897.9	95.8	%	$	929.8	95.6	%	$	1,843.3	95.6	%	$	1,810.9	95.5	%
Foreign	38.9		4.2	%	42.5		4.4	%	84.0		4.4	%	85.1		4.5	%
	$	936.8	100.0	%	$	972.3	100.0	%	$	1,927.3	100.0	%	$	1,896.0	100.0	%

Revenue from External Customers by Products and Services

The following table presents the ECS segment (federal government IT solutions) revenues by customer type (in millions):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Department of Defense and Intelligence Agencies	$	127.1	$	107.6	$	242.0	$	203.6
Federal Civilian	96.0		71.3		180.6		131.5
Other	16.6		11.7		29.8		23.5
	$	239.7	$	190.6	$	452.4	$	358.6