Restructuring - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 29, 2020	Jun. 28, 2020
Restructuring Cost and Reserve [Line Items]
Lease Termination Costs		$ 4.8
Severance Costs		3.7
Total		8.5
Americas Staffing
Restructuring Cost and Reserve [Line Items]
Lease Termination Costs		4.1
Severance Costs		1.4
Total	$ 5.6	5.5
Global Talent Solutions
Restructuring Cost and Reserve [Line Items]
Lease Termination Costs		0.0
Severance Costs		0.8
Total	0.9	0.8
International Staffing
Restructuring Cost and Reserve [Line Items]
Lease Termination Costs		0.7
Severance Costs		0.4
Total	1.1	1.1
Corporate
Restructuring Cost and Reserve [Line Items]
Lease Termination Costs		0.0
Severance Costs		1.1
Total	$ 1.1	$ 1.1