Pension Benefit Obligations (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 31, 2018	Dec. 31, 2017
United States
Components of net periodic (benefit) cost:
Service costs		$ 1.2
Interest cost on projected benefit obligation	$ 5.9	5.2
Expected return on plan assets	(6.8)	(7.9)
Amortization of net loss	0.9	1.0
Net periodic (benefit) cost		(0.5)
Change in benefit obligation:
Employer contributions	2.5
Expected remaining scheduled annual employer contributions for the current fiscal year	11.8
Foreign Pension Plan, Defined Benefit
Components of net periodic (benefit) cost:
Service costs	0.1	0.3
Interest cost on projected benefit obligation	7.4	7.9
Expected return on plan assets	(9.5)	(10.7)
Amortization of net loss	1.0	2.0
Settlement loss recognized	0.1	0.1
Net periodic (benefit) cost	(0.9)	$ (0.4)
Change in benefit obligation:
Employer contributions	7.9
Expected remaining scheduled annual employer contributions for the current fiscal year	$ 19.3

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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+ References

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(ii)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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