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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2017
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,
2017
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Deferred compensation assets
$
8.5

 
$
8.5

 
$
—

 
$
—

Foreign currency contracts
1.0

 
—

 
1.0

 
—

 
$
9.5

 
$
8.5

 
$
1.0

 
$
—

Liabilities:
 

 
 

 
 

 
 

Contingent consideration
$
8.0

 
$
—

 
$
—

 
$
8.0

Deferred compensation liabilities
9.5

 
9.5

 
—

 
—

Interest rate swap contract
0.2

 
—

 
0.2

 
—

Foreign currency contracts
4.7

 
—

 
4.7

 
—

 
$
22.4

 
$
9.5

 
$
4.9

 
$
8.0


 
Balance at
 
Basis of Fair Value Measurements
($ in millions)
December 31,
2016
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Deferred compensation assets
$
7.4

 
$
7.4

 
$
—

 
$
—

Foreign currency contracts
0.2

 
—

 
0.2

 
—

 
$
7.6

 
$
7.4

 
$
0.2

 
$
—

Liabilities:
 

 
 

 
 

 
 

Contingent consideration
$
8.0

 
$
—

 
$
—

 
$
8.0

Deferred compensation liabilities
8.4

 
8.4

 
—

 
—

Interest rate swap contract
1.0

 
—

 
1.0

 
—

Foreign currency contracts
1.6

 
—

 
1.6

 
—

 
$
19.0

 
$
8.4

 
$
2.6

 
$
8.0
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, 2015
$
6.0

Increase in fair value recorded in earnings
2.3

Payments
(0.3
)
Balance, December 31, 2016
8.0

Increase in fair value recorded in earnings
0.5

Payments
(0.5
)
Balance, September 30, 2017
$
8.0