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Employees - Schedule of Charges Related to Equity-Settled Plans (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Share Based Compensation Plans [Line Items]
Income statement charge	€ (161)	€ (108)	€ (151)
Performance share plans
Disclosure of Share Based Compensation Plans [Line Items]
Income statement charge	(150)	(98)	(142)
Other plans
Disclosure of Share Based Compensation Plans [Line Items]
Income statement charge	€ (11)	€ (10)	€ (9)

X

- Definition

The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

+ Details

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Period Type:	duration

X

- Definition

Disclosure of share based compensation plans.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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Period Type: