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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Measured at Fair Value
The following tables present the assets and liabilities recorded at fair value on a recurring basis:
 
Balance at
 
Basis of Fair Value Measurements
($ in millions)
September 30,
2018
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Deferred compensation assets
$
9.4

 
$
9.4

 
$
—

 
$
—

Foreign currency contracts
2.8

 
—

 
2.8

 
—

 
$
12.2

 
$
9.4

 
$
2.8

 
$
—

Liabilities:
 

 
 

 
 

 
 

Contingent consideration
$
5.2

 
$
—

 
$
—

 
$
5.2

Deferred compensation liabilities
10.5

 
10.5

 
—

 
—

Foreign currency contracts
5.8

 
—

 
5.8

 
—

 
$
21.5

 
$
10.5

 
$
5.8

 
$
5.2


 
Balance at
 
Basis of Fair Value Measurements
($ in millions)
December 31,
2017
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Deferred compensation assets
$
8.9

 
$
8.9

 
$
—

 
$
—

Foreign currency contracts
0.5

 
—

 
0.5

 
—

 
$
9.4

 
$
8.9

 
$
0.5

 
$
—

Liabilities:
 

 
 

 
 

 
 

Contingent consideration
$
4.9

 
$
—

 
$
—

 
$
4.9

Deferred compensation liabilities
9.9

 
9.9

 
—

 
—

Foreign currency contracts
5.1

 
—

 
5.1

 
—

 
$
19.9

 
$
9.9

 
$
5.1

 
$
4.9
Summary of Changes in Level 3 Fair Value Measurements
The following table provides a summary of changes in our Level 3 fair value measurements:
 
($ in millions)
Balance, December 31, 2016
$
8.0

Decrease in fair value recorded in earnings
(2.4
)
Payments
(0.7
)
Balance, December 31, 2017
4.9

Increase in fair value recorded in earnings
0.8

Payments
(0.5
)
Balance, September 30, 2018
$
5.2