Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Disclosures [Abstract]

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

The following tables present the assets and liabilities that are measured at fair value on a recurring basis in our balance sheets:

	Balance at		Basis of Fair Value Measurements
	December 31,
($ in millions)	2011		Level 1		Level 2		Level 3
Assets:
Short-term investments	$	26.5	$	26.5	$	-	$	-
Deferred compensation assets		3.3		3.3		-		-
	$	29.8	$	29.8	$	-	$	-
Liabilities:
Contingent consideration	$	2.1	$	-	$	-	$	2.1
Deferred compensation liabilities		4.6		4.6		-		-
Interest rate swap contracts		8.8		-		8.8		-
	$	15.5	$	4.6	$	8.8	$	2.1

	Balance at		Basis of Fair Value Measurements
	December 31,
($ in millions)	2010		Level 1		Level 2		Level 3
Assets:
Short-term investments	$	0.6	$	0.6	$	-	$	-
Deferred compensation assets		3.6		3.6		-		-
	$	4.2	$	4.2	$	-	$	-
Liabilities:
Contingent consideration	$	2.3	$	-	$	-	$	2.3
Deferred compensation liabilities		5.4		5.4		-		-
Interest rate swap contracts		6.1		-		6.1		-
	$	13.8	$	5.4	$	6.1	$	2.3

Summary of changes in Level 3 Fair Value Measurements

The following table provides a summary of changes in our Level 3 fair value measurements during 2011:

	($ in millions)
Balance, December 31, 2010	$	2.3
Increase in fair value recorded in earnings		0.5
Reduction in fair value recorded in earnings		(0.8	)
Changes in foreign currency exchange rates		0.1
Balance, December 31, 2011	$	2.1

The following table provides a summary of changes in our Level 3 fair value measurements during 2010:

	($ in millions)
Balance, December 31, 2009	$	2.8
Additional contingent consideration acquired		1.8
Increase in fair value recorded in earnings		0.2
Reduction in fair value recorded in earnings		(2.1	)
Changes in foreign currency exchange rates		(0.4	)
Balance, December 31, 2010	$	2.3