Name:	ucc_AsbestosRelatedChargesCredit
Namespace Prefix:	ucc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Asbestos Related Liability Future Claims Percentage

No definition available.

Name:	ucc_AsbestosRelatedLiabilityFutureClaimsPercentage
Namespace Prefix:	ucc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The percentage of the recorded asbestos liability related to pending claims.

No definition available.

Name:	ucc_AsbestosRelatedLiabilityPendingClaimsPercentage
Namespace Prefix:	ucc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos claims, before estimated recoveries from reinsurers.

No definition available.

Name:	ucc_LiabilityForAsbestosClaimsGross
Namespace Prefix:	ucc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process, and reserves for defense and processing costs attributable to asbestos claims

No definition available.

Name:	ucc_LiabilityforAsbestosClaimsandDefenseCostsGross
Namespace Prefix:	ucc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.