Employee Benefit Plans (Tables)

3 Months Ended

Dec. 31, 2012

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of net periodic benefit cost

Components of net periodic pension benefit cost were as follows (in millions):

	Three Months Ended
	December 31,
	2012			2011
Components of net periodic benefit cost
Service cost	$	4.0		$	5.6
Interest cost	4.0			4.1
Expected return on plan assets	(4.1		)	(3.9		)
Amortization of prior service cost	0.4			0.6
Curtailment	0.9			—
Amortization of net actuarial loss	1.1			1.8
Net periodic benefit cost	$	6.3		$	8.2

Components of net periodic other post-employment benefit cost were as follows (in millions):

	Three Months Ended
	December 31,
	2012			2011
Components of net periodic benefit cost
Service cost	$	2.0		$	1.8
Interest cost	0.8			0.9
Amortization of prior service cost	(0.1		)	—
Amortization of net actuarial loss	0.3			0.3
Net periodic benefit cost	$	3.0		$	3.0