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Share-based compensation (Expected share-based compensation expense) (Details) $ in Millions | Dec. 31, 2019 USD ($)
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2020 |
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items] |
Expected share-based compensation expense | $ 57.1
2021 |
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items] |
Expected share-based compensation expense | 35.3
2022 |
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items] |
Expected share-based compensation expense | 16.9
2023 |
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items] |
Expected share-based compensation expense | 3.2
2024 |
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items] |
Expected share-based compensation expense | $ 0.5

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- Definition Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items] + References No definition available. + Details
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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=116856206&loc=d3e5070-113901 + Details
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