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Impairment of intangible assets and property, plant and equipment - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 EUR (€) segment	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 EUR (€)
Disclosure of impairment loss and reversal of impairment loss [line items]
Number of operating segments | segment	3
Discount rate	260.00%
Perpetual growth rate	430.00%
Operating margin rate	670.00%
Impairment of goodwill recognized | €	€ 0	€ 0	€ 0
Bottom of range
Disclosure of impairment loss and reversal of impairment loss [line items]
After tax discount rates	7.25%
Top of range
Disclosure of impairment loss and reversal of impairment loss [line items]
After tax discount rates	8.25%
Cash-generating units
Disclosure of impairment loss and reversal of impairment loss [line items]
Uniform pre-tax discount rates	9.80%
Cash-generating units | CGUs
Disclosure of impairment loss and reversal of impairment loss [line items]
Uniform impairment testing percentage	7.20%
Pharmaceuticals | Goodwill
Disclosure of impairment loss and reversal of impairment loss [line items]
Perpetual growth rates applied to future cash flows	0.00%
Pharmaceuticals | Cash-generating units | CGUs
Disclosure of impairment loss and reversal of impairment loss [line items]
Rate used for Impairment of goodwill	7.25%
Pre-tax discount rates	9.90%
Consumer Healthcare | Goodwill
Disclosure of impairment loss and reversal of impairment loss [line items]
Perpetual growth rates applied to future cash flows	1.00%
Consumer Healthcare | Cash-generating units | CGUs
Disclosure of impairment loss and reversal of impairment loss [line items]
Rate used for Impairment of goodwill	7.00%
Pre-tax discount rates	9.40%
Vaccines | Goodwill
Disclosure of impairment loss and reversal of impairment loss [line items]
Perpetual growth rates applied to future cash flows	0.00%
Vaccines | Cash-generating units | CGUs
Disclosure of impairment loss and reversal of impairment loss [line items]
Rate used for Impairment of goodwill	7.25%
Pre-tax discount rates	9.90%

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- Definition

The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2021-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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