Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of components of the net periodic benefit cost

The components of the net periodic benefit cost related to the Company’s pension and other postretirement benefits for the three and six months ended December 31, 2014 and 2013 were as follows:

Three months ended December 31,	Pension Plans						Other Postretirement Plans
($ in millions)	2014			2013			2014			2013
Service cost	$	8.0		$	8.2		$	1.1		$	1.0
Interest cost	13.5			14.3			3.0			3.1
Expected return on plan assets	(17.2		)	(15.7		)	(1.7		)	(1.6		)
Amortization of net loss	4.2			5.5			0.5			0.3
Amortization of prior service cost	0.1			0.1			—			—
	$	8.6		$	12.4		$	2.9		$	2.8

Six months ended December 31,	Pension Plans						Other Postretirement Plans
($ in millions)	2014			2013			2014			2013
Service cost	$	16.0		$	16.2		$	2.2		$	2.0
Interest cost	27.0			28.6			5.9			6.2
Expected return on plan assets	(34.4		)	(31.4		)	(3.3		)	(3.2		)
Amortization of net loss	8.4			11.0			1.0			0.6
Amortization of prior service cost	0.2			0.2			—			—
	$	17.2		$	24.6		$	5.8		$	5.6