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Employees - Pensions and Similar Obligations, Narrative (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of defined benefit plans [line items]
Percentage of defined benefit liabilities (in percent)	14.00%
Actuarial valuation, time interval	3 years
Actual return on plan assets	€ 990	€ (5,987)
Return on plan assets excluding amounts included in net finance income/(cost)	131	(6,483)	€ 1,958
Interest income, defined benefit plans	859
Property and leases occupied by Unilever
Disclosure of defined benefit plans [line items]
Property and leases	80	77
Unilever securities
Disclosure of defined benefit plans [line items]
Equity securities	0	€ 1
Percentage of plan assets in equity securities (in percent)		0.003%
Special Benefits Trust
Disclosure of defined benefit plans [line items]
Excluded plan assets	€ 33	€ 39
UK and Netherlands
Disclosure of defined benefit plans [line items]
Percentage of defined benefit pension liabilities	66.00%
United Kingdom
Disclosure of defined benefit plans [line items]
Percentage of long term trend future improvements	1.00%
United Kingdom | Interest rate risk | Minimum
Disclosure of defined benefit plans [line items]
Degree of hedging of liabilities, percentage	100.00%
United Kingdom | Inflation rate risk | Minimum
Disclosure of defined benefit plans [line items]
Degree of hedging of liabilities, percentage	100.00%
The Netherlands | Interest rate risk
Disclosure of defined benefit plans [line items]
Degree of hedging of liabilities, percentage	90.00%
The Netherlands | Inflation rate risk
Disclosure of defined benefit plans [line items]
Degree of hedging of liabilities, percentage	20.00%
Other post- employment benefit plans
Disclosure of defined benefit plans [line items]
Period of level of medical cost inflation	8 years
Other post- employment benefit plans | Bottom of range
Disclosure of defined benefit plans [line items]
Rate of level of medical cost inflation (in percent)	7.00%
Other post- employment benefit plans | Top of range
Disclosure of defined benefit plans [line items]
Rate of level of medical cost inflation (in percent)	5.00%
Pension liabilities
Disclosure of defined benefit plans [line items]
Percentage of defined benefit liabilities (in percent)	96.00%
Present value of defined benefit obligation
Disclosure of defined benefit plans [line items]
Percentage of defined benefit liabilities (in percent)	82.00%

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- Definition

Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

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The amount of interest income arising from defined benefit plans. [Refer: Interest income; Post-employment benefit expense in profit or loss, defined benefit plans] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)]

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The amount real estate contributes to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]]

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The amount of other comprehensive income, before tax, resulting from the return on plan assets, excluding amounts included in interest expense (income) arising from defined benefit plans. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense]

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Principal defined benefit plans as percentage of defined benefits plans.

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