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Cash Flow Detail - Operating Activities Narrative (Details) € in Millions, £ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 EUR (€)
Condensed Cash Flow Statements, Captions [Line Items]
Income taxes paid, classified as operating activities					€ 198
Finance income received, classified as operating activities	€ 211				285
VMO2
Condensed Cash Flow Statements, Captions [Line Items]
Dividends received from joint ventures, classified as investing activities		£ 425	€ 512	£ 1,000	€ 1,154	£ 800	€ 909

X

- Definition

The cash inflow representing dividends received from joint ventures, classified as investing activities. [Refer: Total for all joint ventures [member]; Dividends received]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16&doctype=Standard
-URIDate 2024-03-27

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Period Type:	duration

X

- Definition

The cash inflow from finance income received, classified as operating activities. [Refer: Finance income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 31
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_31&doctype=Standard
-URIDate 2024-03-27

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Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for income taxes paid, classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35&doctype=Standard
-URIDate 2024-03-27

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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 04
-Paragraph a
-Publisher SEC

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- Details

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