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Pension Plans - Weighted-Average Target Allocations of Plan Assets (Detail)	Dec. 31, 2022
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	40.00%
Equity Securities [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	30.00%
Equity Securities [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	50.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	60.00%
Fixed Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	50.00%
Fixed Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	70.00%
Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	0.00%
Cash and Equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	0.00%
Cash and Equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	10.00%

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- Definition

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 target 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/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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