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Dispositions of Subsidiaries and Repositioning Actions (Tables)
 12 Months Ended
Dec. 31, 2018
Dispositions of Subsidiaries and Repositioning Actions [Abstract]  
Summary of Repositioning Actions
A summary of our repositioning actions for the year ended December 31, 2018 is (dollars in millions):
Severance
$
68.4

Office lease consolidation and termination
73.5

Asset write-offs related to disposals and other costs
7.5

 
$
149.4
Impact of Repositioning Actions and Net Gain on Disposition of Subsidiaries
The impact of the repositioning actions and net gain on disposition of subsidiaries on operating expenses, income tax expense and noncontrolling interests for 2018 was (dollars in millions):
 
Increase (Decrease)
 
Repositioning
Actions
 
Net Gain on Disposition of Subsidiaries
 
Total
Salary and service costs
$
73.7

 
$
—

 
$
73.7

Occupancy and other costs
73.5

 
—

 
73.5

Net gain on disposition of subsidiaries
—

 
(178.4
)
 
(178.4
)
Cost of services
147.2

 
(178.4
)
 
(31.2
)
Selling, general and administrative expenses
2.2

 
—

 
2.2

Depreciation and amortization
—

 
—

 
—

Operating expenses
$
149.4

 
$
(178.4
)
 
$
(29.0
)
 
 
 
 
 
 
Income tax expense
$
(36.0
)
 
$
11.0

 
$
(25.0
)
 
 
 
 
 
 
Noncontrolling interests
$
—

 
$
6.9

 
$
6.9