Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value of Financial Instruments [Abstract]

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

The following tables present, by level within the fair value hierarchy, certain of our financial assets and liabilities:

	Balance at		Basis of Fair Value Measurements
	March 31,
($ in millions)	2012		Level 1		Level 2		Level 3
Assets:
Short-term investments	$	26.4	$	26.4	$	-	$	-
Deferred compensation assets		3.6		3.6		-		-
	$	30.0	$	30.0	$	-	$	-
Liabilities:
Contingent consideration	$	2.3	$	-	$	-	$	2.3
Deferred compensation liabilities		5.4		5.4		-		-
Foreign currency contracts		0.5		-		0.5		-
Interest rate swap contracts		8.2		-		8.2		-
Long-term debt		289.5		-		289.5		-
	$	305.9	$	5.4	$	298.2	$	2.3

	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

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, 2011	$	2.1
Increase in fair value recorded in earnings		0.2
Balance, March 31, 2012	$	2.3