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Cash and cash equivalents and short-term investments - Short-Term Investments (Detail) - EUR (€) € in Millions	Dec. 31, 2022	Dec. 31, 2021
Short Term Investments [Line Items]
Cash and cash equivalents	€ 7,268.3	€ 6,951.8
Short-term investments	107.7	638.5
Deposits with financial institutions, governments and government related bodies
Short Term Investments [Line Items]
Cash and cash equivalents	2,548.1	2,131.7
Bank accounts
Short Term Investments [Line Items]
Cash and cash equivalents	1,523.5	1,891.8
Fair Value, Recurring
Short Term Investments [Line Items]
Investments in money market funds	3,196.7	2,928.3
Short-term investments	€ 107.7	€ 638.5

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Short Term Investments [Line Items]

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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