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Share Buyback Programme - Additional Information (Detail) - EUR (€)				6 Months Ended
	Aug. 27, 2021	May 06, 2021	Apr. 29, 2021	Jun. 30, 2021
Disclosure of share buyback programme [line items]
Share buyback programme, Amount authorised			€ 3,000,000,000
Date of commencement of share buy back programme		May 06, 2021
Share Repurchase Programme 2021 [Member]
Disclosure of share buyback programme [line items]
Share repurchase programme expiration date	Aug. 27, 2021
Share buyback programme, Amount	€ 1,500,000,000
Stock shares repurchased during the period shares				17,973,091
Share buyback programme,Amount paid for shares repurchased				€ 845,000,000
Amount payable for share repurchases				€ 52,000,000

X

- Definition

The cash outflow to acquire or redeem entity's shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17_b&doctype=Standard
-URIDate 2020-01-01

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- Definition

Consideration for share buy back programme first tranche

+ References

No definition available.

+ Details

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- Definition

Date Of Commencement Of Share Buyback Programme.

+ References

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- Definition

Disclosure of share buyback programme.

+ References

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- Definition

Maximum value for announced share buy back programme.

+ References

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- Definition

Number of treasury shares repurchased.

+ References

No definition available.

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- Definition

Share repurchase programme first tranche expiration date

+ References

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- Definition

Unpaid consideration included with in current financial liabilities

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- Details

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