Retirement Benefits (Tables)

3 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

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

	Pension Benefits
	Three Months Ended December 31,
	2014			2013
Service cost	$	21.7		$	19.7
Interest cost	42.3			43.6
Expected return on plan assets	(56.1		)	(54.5		)
Amortization:
Prior service credit	(0.7		)	(0.7		)
Net actuarial loss	30.0			24.9
Net periodic benefit cost	$	37.2		$	33.0

	Other Postretirement Benefits
	Three Months Ended December 31,
	2014			2013
Service cost	$	0.4		$	0.5
Interest cost	1.0			1.6
Amortization:
Prior service credit	(3.7		)	(2.5		)
Net actuarial loss	1.2			0.7
Net periodic benefit cost	$	(1.1	)	$	0.3