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=118257860&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=118255775&loc=d3e1928-114920

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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=118255775&loc=d3e1928-114920

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- Details

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Employee Benefit Plans (Pension Plan Asset Allocation and Target Allocation) (Detail)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Plan asset		64.00%	55.00%
Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Plan asset		35.00%	34.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Plan asset		1.00%	0.00%
Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Plan asset		0.00%	11.00%
Scenario Forecast \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Target allocation plan asset	45.00%
Scenario Forecast \| Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Target allocation plan asset	50.00%
Scenario Forecast \| Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit Plan, Target allocation plan asset	5.00%