The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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Commitments and Contingencies - Additional Information (Detail) $ in Millions	Apr. 04, 2018 USD ($)	Jun. 30, 2018 USD ($) lawsuit	Apr. 30, 2016 USD ($)	Sep. 30, 2011 lawsuit
Loss Contingencies [Line Items]
Number of lawsuits against Company \| lawsuit		7		55
Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		$ 14.1
Expiring in 2018 \| Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		1.0
Expiring in 2020 \| Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		0.1
Expiring in 2021 \| Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		2.3
Expiring in 2022 \| Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		3.1
Expiring in 2023 \| Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		7.5
Line of Credit
Loss Contingencies [Line Items]
Letters of credit outstanding amount		$ 2.7
Phazzer
Loss Contingencies [Line Items]
Litigation settlement, amount awarded from other party	$ 7.8
Paris, France \| International Chamber of Commerce
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			$ 0.6