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Employees - Schedule of Cash Flow in Respect of Pensions and Similar Post-Employment Benefits (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 EUR (€)	Dec. 31, 2021 EUR (€)
Disclosure of defined benefit plans [line items]
Defined Benefit		€ 407		€ 303
Group cash flow in respect of pensions and similar benefits		629		515	€ 584
2024 Estimate
Disclosure of defined benefit plans [line items]
Group cash flow in respect of pensions and similar benefits	€ 405
Company contributions to funded plans
Disclosure of defined benefit plans [line items]
Defined Benefit		291		176	286
Defined Contribution		222		212	190
Company contributions to funded plans | United States
Disclosure of defined benefit plans [line items]
Defined Benefit | $			$ 110
Company contributions to funded plans | 2024 Estimate
Disclosure of defined benefit plans [line items]
Defined Benefit	70
Defined Contribution	225
Company contributions to funded plans | 2024 Estimate | The Netherlands
Disclosure of defined benefit plans [line items]
Refund from plan	115
Company contributions to funded plans | 2024 Estimate | United Kingdom
Disclosure of defined benefit plans [line items]
Defined Benefit	0
Benefit paid by the Company in respect of unfunded plans
Disclosure of defined benefit plans [line items]
Defined Benefit		€ 116		€ 127	€ 108
Benefit paid by the Company in respect of unfunded plans | 2024 Estimate
Disclosure of defined benefit plans [line items]
Defined Benefit	€ 110

X

- Definition

The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 141
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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of employer contributions to retirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2023-01-01
-Paragraph 35
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- Definition

Cash flow in respect of pensions and similar benefits.

+ References

No definition available.

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- Definition

Increase (Decrease) In Net Defined Benefit Liability (Asset) Resulting From Partial Refund

+ References

No definition available.

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