Retirement Benefits (Tables)

9 Months Ended

Jun. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Components of net periodic benefit cost

The components of net periodic benefit cost are (in millions):

	Pension Benefits
	Three Months Ended June 30,						Nine Months Ended June 30,
	2012			2011			2012			2011
Service cost	$	17.8		$	17.8		$	53.8		$	52.9
Interest cost	41.7			41.6			125.6			123.5
Expected return on plan assets	(56.8		)	(52.2		)	(171.0		)	(154.3		)
Amortization:
Prior service credit	(0.6		)	(0.5		)	(1.8		)	(1.5		)
Net actuarial loss	23.6			16.0			71.0			47.8
Net periodic benefit cost	$	25.7		$	22.7		$	77.6		$	68.4

	Other  Postretirement Benefits
	Three Months Ended June 30,						Nine Months Ended June 30,
	2012			2011			2012			2011
Service cost	$	0.6		$	0.8		$	1.7		$	2.6
Interest cost	1.8			2.5			5.4			7.6
Amortization:
Prior service credit	(2.6		)	(2.6		)	(7.9		)	(7.9		)
Net actuarial loss	0.6			1.7			1.8			4.9
Net periodic benefit cost	$	0.4		$	2.4		$	1.0		$	7.2