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Investment and Return - Additional Information (Detail) - EUR (€) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of cash and cash equivalents [line items] |  |  |  |
Financial assets measured at fair value through profit or loss reclassified to amortised cost |  | € 6 |  |
Cash and cash equivalents held by central finance companies | € 800 |  |  |
Percentage of cash and cash equivalents held by central finance companies | 26.00% |  |  |
Cash and cash equivalents held with foreign subsidiaries | € 2,400 |  |  |
Percentage of cash and cash equivalents held with foreign subsidiaries | 74.00% |  |  |
Cash and cash equivalents held with foreign subsidiaries for general use by wider business | € 154 |  | € 206 | € 240
Description of collateral held as security | To reduce this risk, Unilever has concentrated its main activities with a limited number of counter-parties which have secure credit ratings. Individual risk limits are set for each counter-party based on financial position, credit rating and past experience. Credit limits and concentration of exposures are actively monitored by the Group’s treasury department. Netting agreements are also put in place with Unilever’s principal counter-parties. In the case of a default, these arrangements would allow Unilever to net assets and liabilities across transactions with that counter-party. To further reduce the Group’s credit exposures on derivative financial instruments, Unilever has collateral agreements with Unilever’s principal counter-parties in relation to derivative financial instruments. |  |  |
Collateral held permitted to be sold or repledged in absence of default by owner of collateral, at fair value | € 10 |  | 6 |
IFRS9 [member] |  |  |  |
Disclosure of cash and cash equivalents [line items] |  |  |  |
Equity instruments recogonised at fair value through profit or loss |  | € 207 |  |
Cash [Member] |  |  |  |
Disclosure of cash and cash equivalents [line items] |  |  |  |
Collateral held permitted to be sold or repledged in absence of default by owner of collateral, at fair value | 10 |  | 6 |
Bond Securities [Member] |  |  |  |
Disclosure of cash and cash equivalents [line items] |  |  |  |
Collateral held permitted to be sold or repledged in absence of default by owner of collateral, at fair value | € 0 |  | € 0 |

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- Definition The description of collateral held as security and other credit enhancements in respect of the amount that best represents the maximum exposure to credit risk. This includes a description of the nature and quality of the collateral held, an explanation of any significant changes in the quality of that collateral or credit enhancements and information about financial instruments for which an entity has not recognised a loss allowance because of the collateral. [Refer: Credit risk [member]; Maximum exposure to credit risk] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 35K -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35K_b&doctype=Standard -URIDate 2017-03-09 + Details
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