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Segments - Narrative (Detail)	Sep. 30, 2020 operating_division
Segment Reporting [Abstract]
Number of operating divisions	3

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- Definition

Number of Divisions

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No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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