Other Expense (Income) (Tables)

12 Months Ended

Dec. 31, 2015

Other Income and Expenses [Abstract]

Schedule of Other Income and Expense

Other expense (income) consisted of:

($ in millions)	2015			2014			2013
Pension settlement charge	$	50.4		$	—		$	—
Executive retirement and related costs	10.9			—			—
License costs	—			1.2			—
Development income	(1.5		)	(1.6		)	(2.0		)
Contingent consideration costs	1.1			1.0			1.0
Other items	(0.8		)	(0.8		)	0.5
Total other expense (income)	$	60.1		$	(0.2	)	$	(0.5	)