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Summary of Significant Accounting Policies - Liquidity and Going Concern (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Dec. 31, 2023
Capital contributed		$ 384,893
Howard Hughes Holdings Inc.
Capital contributed	$ 23,400

X

- Definition

The amount of net parent investment.

+ References

No definition available.

+ Details

Name:	seg_NetParentInvestment
Namespace Prefix:	seg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=seg_HowardHughesHoldingIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: