Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities 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)	December 31, 2014		Level 1		Level 2		Level 3
Assets:
Deferred compensation assets	$	6.6	$	6.6	$	—	$	—
Foreign currency contracts	0.2		—		0.2
	$	6.8	$	6.6	$	0.2	$	—
Liabilities:
Contingent consideration	$	5.0	$	—	$	—	$	5.0
Deferred compensation liabilities	8.7		8.7		—		—
Interest rate swap contracts	3.6		—		3.6		—
	$	17.3	$	8.7	$	3.6	$	5.0

	Balance at		Basis of Fair Value Measurements
($ in millions)	December 31, 2013		Level 1		Level 2		Level 3
Assets:
Short-term investments	$	7.5	$	7.5	$	—	$	—
Deferred compensation assets	5.7		5.7		—		—
	$	13.2	$	13.2	$	—	$	—
Liabilities:
Contingent consideration	$	4.3	$	—	$	—	$	4.3
Deferred compensation liabilities	7.8		7.8		—		—
Interest rate swap contracts	5.6		—		5.6		—
	$	17.7	$	7.8	$	5.6	$	4.3

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, 2012	$	3.3
Increase in fair value recorded in earnings	1.1
Payments	(0.1		)
Balance, December 31, 2013	4.3
Increase in fair value recorded in earnings	1.0
Payments	(0.3		)
Balance, December 31, 2014	$	5.0