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Schedule of Target Assets Allocation (Detail)	Dec. 31, 2022
Barclays U.S. Corporate A or Better Index | U.S. corporate fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	75.00%
Barclays U.S. Long Government Bond Index | U.S. government fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	14.00%
MSCI World Minimum Volatility Index | Global equity
Defined Benefit Plan Disclosure
Target assets allocation percentage	5.00%
Barclays U.S. Corporate High Yield 2% Issuer Cap Index | High yield fixed income
Defined Benefit Plan Disclosure
Target assets allocation percentage	5.00%
Citigroup Three Month U.S. 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
-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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