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Schedule of Target Assets Allocation (Detail)	Dec. 31, 2023
Bloomberg U.S. Corporate A or Better Index, 20+ Year Index | U.S. corporate fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	43.00%
Bloomberg U.S. Corporate A or Better Index, 5- 20 Year Index | U.S. corporate fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	32.00%
Bloomberg U.S. 3 - 10 Year Treasury Bond Index | U.S. government fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	14.00%
MSCI World Index | Global equity
Defined Benefit Plan Disclosure
Target assets allocation percentage	5.00%
ICE BofA BB-B U.S. High Yield Constrained Index | High yield fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	5.00%
ICE BofA 3-Month Treasury Bill Index | Cash
Defined Benefit Plan Disclosure
Target assets allocation percentage	1.00%

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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
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-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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