The number of share options outstanding in a share-based payment arrangement.

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The number of share options exercisable in a share-based payment arrangement.

+ References

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The number of share options exercised in a share-based payment arrangement.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average exercise price of share options outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Share-based compensation - Accelerate! options (Detail)	12 Months Ended
Share-based compensation - Accelerate! options (Detail)	Dec. 31, 2021 € / shares	Dec. 31, 2021 $ / shares € / shares	Dec. 31, 2021 $ / shares	Dec. 31, 2020 € / shares	Dec. 31, 2020 $ / shares
Euro [Member]
Share-based compensation [Line Items]
Number of share options outstanding in share-based payment arrangement	239,077	239,077	239,077
Euro [Member] \| Accelerate options [Member]
Share-based compensation [Line Items]
Number of share options outstanding in share-based payment arrangement	136,975	136,975	136,975	163,200	163,200
Weighted average exercise price of share options outstanding in share-based payment arrangement \| € / shares	€ 18.13	€ 18.13		€ 17.66
Number of share options exercised in share-based payment arrangement	26,225	26,225
Weighted average exercise price of share options exercised in share-based payment arrangement \| € / shares	€ 15.24
Number of share options exercisable in share-based payment arrangement	136,975	136,975	136,975
Weighted average exercise price of share options exercisable in share-based payment arrangement \| € / shares	€ 18.13	€ 18.13
US Dollar [Member]
Share-based compensation [Line Items]
Number of share options outstanding in share-based payment arrangement	150,165	150,165	150,165
US Dollar [Member] \| Accelerate options [Member]
Share-based compensation [Line Items]
Number of share options outstanding in share-based payment arrangement	17,500	17,500	17,500	37,800	37,800
Weighted average exercise price of share options outstanding in share-based payment arrangement \| $ / shares			$ 20.02		$ 20.02
Number of share options exercised in share-based payment arrangement	20,300	20,300
Weighted average exercise price of share options exercised in share-based payment arrangement \| $ / shares		€ 20.02
Number of share options exercisable in share-based payment arrangement	17,500	17,500	17,500
Weighted average exercise price of share options exercisable in share-based payment arrangement \| $ / shares			$ 20.02