Retirement Benefits (Tables)

6 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The components of net periodic benefit cost for our defined benefit pension plans for the three and six months ended 31 March 2019 and 2018 were as follows:

	Pension Benefits
	2019						2018
Three Months Ended 31 March	U.S.			International			U.S.			International
Service cost		$5.3			$4.9			$6.4			$6.6
Interest cost	28.4			9.0			26.8			9.6
Expected return on plan assets	(43.1		)	(19.2		)	(50.4		)	(21.1		)
Prior service cost amortization	.3			.1			.4			—
Actuarial loss amortization	16.5			2.8			22.2			10.3
Settlements	5.0			—			1.5			—
Special termination benefits	—			—			.4			—
Other	—			.1			—			.1
Net Periodic Benefit Cost (Total)		$12.4			($2.3	)		$7.3			$5.5

	Pension Benefits
	2019						2018
Six Months Ended 31 March	U.S.			International			U.S.			International
Service cost		$10.7			$9.8			$12.8			$12.9
Interest cost	56.8			18.0			53.5			18.8
Expected return on plan assets	(86.2		)	(38.1		)	(100.8		)	(41.3		)
Prior service cost amortization	.6			.1			.8			—
Actuarial loss amortization	32.6			5.6			43.9			20.3
Settlements	5.8			.2			3.3			—
Special termination benefits	.7			—			.4			—
Other	—			.4			—			.6
Net Periodic Benefit Cost (Total)		$21.0			($4.0	)		$13.9			$11.3