Other Expense (Tables)

6 Months Ended

Jun. 30, 2015

Other Income and Expenses [Abstract]

Schedule of Other Expense

Other expense consists of:

	Three Months Ended June 30,						Six Months Ended June 30,
($ in millions)	2015			2014			2015			2014
Executive retirement and related costs	$	10.9		$	—		$	10.9		$	—
Development income	(0.4		)	(0.5		)	(0.8		)	(0.9		)
Acquisition-related contingencies	0.1			0.3			0.3			0.7
Other items	(0.4		)	0.5			(1.0		)	1.2
	$	10.2		$	0.3		$	9.4		$	1.0