Retirement Benefit Plans - Estimated Future Payments (Details) $ in Millions	Dec. 31, 2018 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2019	$ 11.0
2020	10.3
2021	9.5
2022	9.1
2023	8.0
2024-2028	28.9
Domestic Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2019	22.5
2020	19.8
2021	18.9
2022	18.3
2023	17.8
2024-2028	84.2
Foreign Plan [Member] \| Pension Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2019	19.6
2020	21.7
2021	21.9
2022	22.6
2023	23.8
2024-2028	$ 134.0

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- Definition

Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

+ References

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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