Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2019

Revenue From Contract With Customer [Abstract]

Disaggregation of Revenue

In the following table, revenue is disaggregated by service types and timing of revenue recognition and includes a reconciliation of the disaggregated revenues by reportable segment.

	Year Ended December 31,
	2019										2018
	Staffing and Interim		Outcome- Based Solutions and Consulting		Permanent Recruitment		Other		Total		Staffing and Interim		Outcome- Based Solutions and Consulting		Permanent Recruitment		Other		Total
Americas:
United States	$	2,186.8	$	130.9	$	98.0	$	91.3	$	2,507.0	$	2,208.3	$	129.7	$	92.9	$	91.4	$	2,522.3
Other Americas		1,596.6		49.0		25.4		4.3		1,675.3		1,561.1		47.2		24.7		4.0		1,637.0
		3,783.4		179.9		123.4		95.6		4,182.3		3,769.4		176.9		117.6		95.4		4,159.3
Southern Europe:
France		5,159.5		232.4		52.1		15.7		5,459.7		5,526.5		224.7		54.9		21.6		5,827.7
Italy		1,401.9		44.6		37.6		22.4		1,506.5		1,565.6		48.4		35.9		20.7		1,670.6
Other Southern Europe		1,800.7		332.3		58.9		8.3		2,200.2		1,496.4		306.2		54.8		15.9		1,873.3
		8,362.1		609.3		148.6		46.4		9,166.4		8,588.5		579.3		145.6		58.2		9,371.6
Northern Europe		4,180.9		332.3		145.7		32.4		4,691.3		4,746.3		426.2		164.4		33.6		5,370.5
APME		2,159.7		294.7		159.8		13.0		2,627.2		2,394.0		284.9		196.3		15.1		2,890.3
Right Management		—		46.2		—		150.1		196.3		—		49.9		—		149.6		199.5
Total	$	18,486.1	$	1,462.4	$	577.5	$	337.5	$	20,863.5	$	19,498.2	$	1,517.2	$	623.9	$	351.9	$	21,991.2

	Year Ended December 31,
	2019						2018
	Services transferred over time		Services transferred at a point in time		Total		Services transferred over time		Services transferred at a point in time		Total
Americas:
United States	$	2,453.1	$	53.9	$	2,507.0	$	2,471.0	$	51.3	$	2,522.3
Other Americas		1,657.9		17.4		1,675.3		1,619.7		17.3		1,637.0
		4,111.0		71.3		4,182.3		4,090.7		68.6		4,159.3
Southern Europe:
France		5,410.9		48.8		5,459.7		5,775.1		52.6		5,827.7
Italy		1,471.8		34.7		1,506.5		1,637.1		33.5		1,670.6
Other Southern Europe		2,151.3		48.9		2,200.2		1,827.7		45.6		1,873.3
		9,034.0		132.4		9,166.4		9,239.9		131.7		9,371.6
Northern Europe		4,564.5		126.8		4,691.3		5,229.1		141.4		5,370.5
APME		2,526.3		100.9		2,627.2		2,758.3		132.0		2,890.3
Right Management		196.3		—		196.3		199.5		—		199.5
Total	$	20,432.1	$	431.4	$	20,863.5	$	21,517.5	$	473.7	$	21,991.2