Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2022

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,
	2022											2021
	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	$	2,862.5	$	274.3	$	209.0	$	153.5	$	3,499.3		$	2,292.1	$	154.9	$	147.8	$	148.5	$	2,743.3
Other Americas		1,329.3		51.9		48.6		6.6		1,436.4			1,430.3		45.9		34.5		9.7		1,520.4
		4,191.8		326.2		257.6		160.1		4,935.7			3,722.4		200.8		182.3		158.2		4,263.7
Southern Europe:
France		4,421.8		268.0		57.9		37.3		4,785.0			4,765.1		329.8		53.5		22.9		5,171.3
Italy		1,600.7		31.9		51.7		22.6		1,706.9			1,695.6		33.9		45.6		20.3		1,795.4
Other Southern Europe		1,635.0		336.7		62.0		10.7		2,044.4			1,945.0		369.4		52.6		13.1		2,380.1
		7,657.5		636.6		171.6		70.6		8,536.3			8,405.7		733.1		151.7		56.3		9,346.8
Northern Europe		3,567.4		215.0		179.3		86.6		4,048.3			4,191.4		255.5		145.9		77.7		4,670.5
APME		1,809.6		392.0		149.1		36.6		2,387.3			1,886.6		408.1		143.2		43.2		2,481.1
		17,226.3		1,569.8		757.6		353.9		19,907.6			18,206.1		1,597.5		623.1		335.4		20,762.1
Intercompany Eliminations										(80.1	)										(37.7	)
Total									$	19,827.5										$	20,724.4

	Year Ended December 31,
	2022							2021
	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	$	3,380.9	$	118.4	$	3,499.3		$	2,663.9	$	79.4	$	2,743.3
Other Americas		1,406.3		30.1		1,436.4			1,498.6		21.8		1,520.4
		4,787.2		148.5		4,935.7			4,162.5		101.2		4,263.7
Southern Europe:
France		4,732.3		52.7		4,785.0			5,122.4		48.9		5,171.3
Italy		1,659.4		47.5		1,706.9			1,752.8		42.6		1,795.4
Other Southern Europe		1,993.8		50.6		2,044.4			2,337.1		43.0		2,380.1
		8,385.5		150.8		8,536.3			9,212.3		134.5		9,346.8
Northern Europe		3,902.9		145.4		4,048.3			4,545.0		125.5		4,670.5
APME		2,302.4		84.9		2,387.3			2,401.1		80.0		2,481.1
		19,378.0		529.6		19,907.6			20,320.9		441.2		20,762.1
Intercompany Eliminations						(80.1	)						(37.7	)
Total					$	19,827.5						$	20,724.4