Retirement Benefits (Tables)

3 Months Ended

Dec. 31, 2018

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

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

	Pension Benefits
	Three Months Ended December 31,
	2018			2017
Service cost	$	19.6		$	22.2
Interest cost	39.6			38.8
Expected return on plan assets	(61.2		)	(61.2		)
Amortization:
Prior service cost	0.3			0.2
Net actuarial loss	19.5			28.3
Settlements	(0.2		)	—
Net periodic benefit cost	$	17.6		$	28.3

	Other Postretirement Benefits
	Three Months Ended December 31,
	2018			2017
Service cost	$	0.2		$	0.3
Interest cost	0.6			0.6
Amortization:
Prior service credit	(1.4		)	(1.3		)
Net actuarial loss	0.2			0.4
Net periodic benefit credit	$	(0.4	)	$	—

The service cost component is included in Cost of sales and Selling, general and administrative expenses in the Consolidated Statement of Operations. All other components are included in Other income (expense) in the Consolidated Statement of Operations.