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Defined Benefit Plan - Summary of Allocation of Assets in Swiss Life's Group Life Portfolio (Detail) - Pension Plan	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Allocation of pension plan assets	100.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of pension plan assets	59.00%
Hedge Funds, Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of pension plan assets	15.00%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of pension plan assets	25.00%
Equity Method Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Allocation of pension plan assets	1.00%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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