Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured at fair value on a recurring basis

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, 2013		Level 1		Level 2		Level 3
Assets:
Short-term investments	$	7.5	$	7.5	$	—	$	—
Deferred compensation assets	5.2		5.2		—		—
	$	12.7	$	12.7	$	—	$	—
Liabilities:
Contingent consideration	$	3.8	$	—	$	—	$	3.8
Deferred compensation liabilities	9.8		9.8		—		—
Interest rate swap contracts	6.3		—		6.3		—
Foreign currency contracts	1.8		—		1.8		—
	$	21.7	$	9.8	$	8.1	$	3.8

	Balance at		Basis of Fair Value Measurements
($ in millions)	December 31, 2012		Level 1		Level 2		Level 3
Assets:
Short-term investments	$	12.4	$	12.4	$	—	$	—
Deferred compensation assets	4.0		4.0		—		—
	$	16.4	$	16.4	$	—	$	—
Liabilities:
Contingent consideration	$	3.3	$	—	$	—	$	3.3
Deferred compensation liabilities	7.6		7.6		—		—
Interest rate swap contracts	8.6		—		8.6		—
Foreign currency contracts	1.4		—		1.4		—
	$	20.9	$	7.6	$	10.0	$	3.3

Summary of changes in Level 3 fair value measurements

The following table provides a summary of changes in our Level 3 fair value measurements:

	Nine Months Ended September 30,
	2013		2012
Beginning Balance	$	3.3	$	2.1
Increase in fair value recorded in earnings	0.5		0.9
Ending Balance	$	3.8	$	3.0