Revenue from contracts with customer - Changes in Contract Assets and Liabilities (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Contract Assets
Contract assets, beginning balance	€ 131.9	€ 164.6
Transferred from contract assets to accounts receivables	(402.0)	(393.4)
Revenue recognized during the year ending in contract assets	135.1	116.5
Transfer between contract assets and liabilities	375.1	244.2
Contract assets, ending balance	240.1	131.9
Change in Contract with Customer, Liability [Abstract]
Contract Liabilities, Balance at beginning of the year	17,750.9	11,160.9
Revenue recognized that was included in contract liabilities	(11,106.1)	(6,326.6)
Changes as a result of cumulative catch-up adjustments arising from changes in estimates	(24.9)	(118.0)
Remaining performance obligations for which considerations have been received, or for which we have an unconditional right to consideration	9,416.3	12,790.4
Transfer between contract assets and liabilities	375.1	244.2
Other	(144.8)
Contract Liabilities, Balance at end of the year	€ 16,266.5	€ 17,750.9

Contract With Customer Asset, Revenue Recognized During The Current Year

No definition available.

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- Definition

Contract with Customer, Liability, Other

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No definition available.

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- Definition

Contract with Customer, Asset, Transfer Between Contract Assets and Liabilities

+ References

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Contract with Customer, Liability, Consideration Becoming Unconditional

+ References

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Contract with Customer, Liability, Transfer Between Contract Assets and Liabilities

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Name Accounting Standards Codification
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Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from contract modification which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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