Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Mar. 31, 2014

Pension and Other Postretirement Benefits

Schedule of components of the net periodic benefit cost

							Other Postretirement
Three months ended March 31,	Pension Plans						Plans
($ in millions)	2014			2013			2014			2013
Service cost	$	8.0		$	8.3		$	1.0		$	1.1
Interest cost	14.3			13.3			3.1			3.0
Expected return on plan assets	(15.7		)	(13.7		)	(1.6		)	(1.6		)
Amortization of net loss	5.5			7.0			0.3			0.8
Amortization of prior service cost (benefit)	0.1			0.2			—			(1.0		)
	$	12.2		$	15.1		$	2.8		$	2.3

							Other Postretirement
Nine months ended March 31,	Pension Plans						Plans
($ in millions)	2014			2013			2014			2013
Service cost	$	24.2		$	24.4		$	3.0		$	3.3
Interest cost	43.0			39.8			9.3			9.1
Expected return on plan assets	(47.1		)	(41.1		)	(4.8		)	(4.8		)
Amortization of net loss	16.3			21.0			0.9			2.4
Amortization of prior service cost (benefit)	0.4			0.6			—			(3.0		)
	$	36.8		$	44.7		$	8.4		$	7.0