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Summary of Significant Accounting Policies - Restricted Cash (Details) $ in Millions	1 Months Ended
	Aug. 31, 2024 USD ($)
250 Water Street litigation
Amount of litigation	$ 40.0

X

- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (g)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-25

+ Details

Name:	us-gaap_PaymentsForLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	srt_LitigationCaseAxis=seg_TwoHundredFiftyWaterStreetLitigationCaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: