Shareholders' equity - Dividends - Dividends paid (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shareholders' equity [abstract]
Interim dividend, current year	€ 796	€ 796	€ 665	€ 532
Dividend, balance for prior year	1,061	1,064	1,064	1,064
Total dividends	€ 1,857	€ 1,860	€ 1,729	€ 1,596

The amount of dividends recognised as distributions to owners of the parent. [Refer: Parent [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2019-03-27

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- Definition

The amount of dividends relating to the current year, recognised as distributions to owners of the parent. [Refer: Parent [member]]

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- Definition

The amount of dividends relating to prior years, recognised as distributions to owners of the parent. [Refer: Parent [member]]

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- Definition

Shareholders' equity [abstract]

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No definition available.

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