Working capital - Disclosure of changes in working capital (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Working Capital [Abstract]
(Increase)/decrease in inventories	€ 632	€ (4,388)	€ (5,606)
(Increase)/decrease in trade receivables	786	(2,249)	(1,986)
Increase/(decrease) in trade payables	(4,007)	1,058	4,165
Other changes	(3,398)	107	(1,054)
Total change in working capital	€ (5,987)	€ (5,472)	€ (4,481)

Adjustments for decrease (increase) in inventories to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Inventories; Profit (loss)]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Adjustments for decrease (increase) in trade accounts receivable to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]

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Adjustments for increase (decrease) in trade accounts payable to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]

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- Definition

The increase (decrease) in working capital.

+ References

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Other Decrease (Increase) In Working Capital

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Working Capital [Abstract]

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