- Narrative (Details) - Ducommun AeroStructures $ in Millions	Dec. 31, 2019 USD ($)
El Mirage and Monrovia, California
Loss Contingencies [Line Items]
Reserve for estimated liability	$ 1.5
Casmalia and West Covina, California
Loss Contingencies [Line Items]
Reserve for estimated liability	0.4
Casmalia and West Covina, California \| Minimum
Loss Contingencies [Line Items]
Estimate of possible loss	0.4
Casmalia and West Covina, California \| Maximum
Loss Contingencies [Line Items]
Estimate of possible loss	$ 3.1

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12021-110248

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant