Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2012

Retirement Plans

Schedule of components of net periodic benefit cost (income)

	Three months ended						Nine months ended
	September 30,						September 30,
	2012			2011			2012			2011
	($ in millions)
Service cost	$	0.2		$	0.2		$	0.6		$	0.6
Interest cost	1.2			1.3			3.6			3.9
Expected return on plan assets	(1.7		)	(1.9		)	(5.1		)	(5.7		)
Amortization of unrecognized loss	0.2			0.1			0.6			0.3
Net periodic pension income before settlement and special termination benefits expense	(0.1		)	(0.3		)	(0.3		)	(0.9		)
Settlement expense	0.5			—			0.5			—
Special termination benefits expense (1)	0.1			0.2			0.2			0.6
Net periodic benefit expense (income)	$	0.5		$	(0.1	)	$	0.4		$	(0.3	)

(1)Special termination benefits represent additional payments made from the Qualified Plan to certain vested participants when their employment was terminated due to a reduction in force.