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Restructuring (Tables)
 12 Months Ended
Dec. 31, 2017
Restructuring and Related Activities [Abstract]  
Summary of Restructuring Reserve
A summary of our global restructuring balance sheet accrual, primarily included in accrued payroll and related taxes, is detailed below (in millions of dollars).

Balance as of year-end 2015
$
0.5

Additions charged to Americas Staffing
1.8

Additions charged to International Staffing
1.2

Additions charged to Global Talent Solutions
0.4

Reductions for cash payments related to all restructuring activities
(3.4
)
Balance as of year-end 2016
0.5

Additions charged to charged to Global Talent Solutions
2.0

Additions charged to Americas Staffing
0.4

Reductions for cash payments related to all restructuring activities
(2.7
)
Balance as of year-end 2017
$
0.2