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Other Expense (Tables)
 3 Months Ended
Mar. 31, 2018
Other Income and Expenses [Abstract]  
Schedule of Other Expense
Other expense consists of:

 
Three Months Ended
March 31,
($ in millions)
2018
 
2017
Restructuring and related charges:
 
 
 
Severance and post-employment benefits
$
2.0

 
$
—

Asset-related charges
0.1

 
—

Other charges
1.2

 
—

Total restructuring and related charges
3.3

 
—

Development and licensing income
(0.2
)
 
(0.4
)
Contingent consideration
0.3

 
0.3

Other items
(0.3
)
 
1.0

Total other expense
$
3.1

 
$
0.9
Schedule of Restructuring Reserve

The following table presents activity related to our restructuring obligations related to the 2018 restructuring plan:

($ in millions)
Severance
and benefits
 
Asset-related charges
 
Other charges
 
Total
Balance, December 31, 2017
$
—

 
$
—

 
$
—

 
$
—

Charges
2.0

 
0.1

 
1.2

 
3.3

Cash payments
—

 
—

 
—

 
—

Non-cash asset write-downs
—

 
(0.1
)
 
(1.2
)
 
(1.3
)
Balance, March 31, 2018
$
2.0

 
$
—

 
$
—

 
$
2.0