Employee Benefit Plans (Tables)

3 Months Ended

Dec. 31, 2016

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,
	2016			2015
Components of net periodic benefit cost
Service cost	$	3.3		$	2.9
Interest cost	4.4			4.6
Expected return on plan assets	(4.5		)	(4.5		)
Amortization of prior service cost	0.4			0.4
Amortization of net actuarial loss	1.0			0.6
Net periodic benefit cost	$	4.6		$	4.0

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

	Three Months Ended   December 31,
	2016			2015
Components of net periodic benefit cost
Service cost	$	0.6		$	0.3
Interest cost	0.4			0.4
Amortization of prior service cost	(0.2		)	(0.2		)
Amortization of net actuarial loss	0.1			—
Net periodic benefit cost	$	0.9		$	0.5