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.

No definition available.

+ Details

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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 http://asc.fasb.org/extlink&oid=112275985&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 http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

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- Details

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- Details

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- Details

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PENSION (Asset Class) (Detail)	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	15.00%
Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanWeightedAverageAssetAllocations	48.00%	52.00%
DefinedBenefitPlanTargetPlanAssetAllocations	50.00%
International Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanWeightedAverageAssetAllocations	15.00%	15.00%
EquitySecuritiesMember
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanWeightedAverageAssetAllocations	63.00%	67.00%
DefinedBenefitPlanTargetPlanAssetAllocations	65.00%
FixedIncomeFundsMember
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanWeightedAverageAssetAllocations	37.00%	33.00%
DefinedBenefitPlanTargetPlanAssetAllocations	35.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	10.00%
Minimum [Member] \| Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	40.00%
Minimum [Member] \| EquitySecuritiesMember
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	55.00%
Minimum [Member] \| FixedIncomeFundsMember
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	25.00%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	20.00%
Maximum [Member] \| Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	60.00%
Maximum [Member] \| EquitySecuritiesMember
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	75.00%
Maximum [Member] \| FixedIncomeFundsMember
Defined Benefit Plan Disclosure [Line Items]
DefinedBenefitPlanTargetPlanAssetAllocations	45.00%