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Share-based compensation (Expected share-based compensation expense) (Details) $ in Millions	Dec. 31, 2021 USD ($)
2022
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]
Expected share-based compensation expense	$ 90.8
2023
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]
Expected share-based compensation expense	69.9
2024
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]
Expected share-based compensation expense	57.5
2025
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]
Expected share-based compensation expense	30.0
2026
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]
Expected share-based compensation expense	$ 5.9

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- Definition

Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]

+ References

No definition available.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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