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Restructuring (Tables)
 6 Months Ended
Jun. 30, 2019
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Balance Sheet Accrual
A summary of the global restructuring balance sheet accrual, included in accrued payroll and related taxes, is detailed below (in millions of dollars).
Balance as of year-end 2018
$
—

Additions charged to Americas Staffing
6.3

Reductions for cash payments
(0.2
)
Balance as of first quarter-end 2019
6.1

Reductions for cash payments
(3.1
)
Accrual adjustments
(0.6
)
Balance as of second quarter-end 2019
$
2.4