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Leases - Operating Leases (Detail) $ in Millions	Dec. 31, 2017 USD ($)
Leases [Abstract]
2018	$ 42.6
2019	41.2
2020	34.0
2021	19.5
2022	8.4
2023 and thereafter	0.7
Total	$ 146.4

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- References

No definition available.

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- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

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Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

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Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
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Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

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Future rental payments receivable within the third year from the balance sheet date under an operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

+ References

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-Name Accounting Standards Codification
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