XML 190 R183.htm IDEA: XBRL DOCUMENT v3.8.0.1

Guarantor Statements - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Notes [Member]
Supplemental Guarantor Information [line items]
Borrowings outstanding amount	$ 8.9	$ 6.3	$ 5.6
Notes [Member] | Bottom of range [member]
Supplemental Guarantor Information [line items]
Interest rate of borrowings	1.375%
Notes [Member] | Top of range [member]
Supplemental Guarantor Information [line items]
Interest rate of borrowings	5.90%
UCC and UNUS [Member]
Supplemental Guarantor Information [line items]
Ownership percentage	100.00%

X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2016-01-13
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_Borrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2016-01-13
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2016-03-30&anchor=para_7&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of ownership by parent entities

+ References

No definition available.

+ Details

Name:	ul_PercentageOfOwnershipByParentEntities
Namespace Prefix:	ul_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Supplemental guarantor information.

+ References

No definition available.

+ Details

Name:	ul_SupplementalGuarantorInformationLineItems
Namespace Prefix:	ul_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=ul_NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ul_UCCAndUNUSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: