PENSION PLANS AND RETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefit (Income) Cost

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended September 30,						Three Months Ended September 30,
	2013			2012			2013			2012
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	1.6		$	1.5		$	0.3		$	0.3
Interest cost	20.2			22.9			0.6			0.7
Expected return on plans’ assets	(34.4		)	(34.9		)	—			—
Amortization of prior service cost	—			0.1			—			—
Recognized actuarial loss	7.4			4.8			0.7			0.6
Net periodic benefit (income) cost	$	(5.2	)	$	(5.6	)	$	1.6		$	1.6
	Pension Benefits						Other Postretirement Benefits
	Nine Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	4.7		$	4.6		$	1.0		$	1.0
Interest cost	60.9			69.0			2.0			2.4
Expected return on plans’ assets	(103.2		)	(104.7		)	—			—
Amortization of prior service cost	0.1			0.2			(0.1		)	(0.1		)
Recognized actuarial loss	22.2			15.0			2.8			2.5
Net periodic benefit (income) cost	$	(15.3	)	$	(15.9	)	$	5.7		$	5.8