Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

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, 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	12.1		12.1		—		—
Interest rate swap contracts	5.6		—		5.6		—
	$	22.0	$	12.1	$	5.6	$	4.3

	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:

	($ in millions)
Balance, December 31, 2011	$	2.1
Increase in fair value recorded in earnings	1.2
Balance, December 31, 2012	3.3
Increase in fair value recorded in earnings	1.0
Balance, December 31, 2013	$	4.3